solar panel sailboat

Top 3 Best Solar Panels For Sailboats

Choosing whether or not to install solar panels on your sailboat is a big decision. They are not exactly cheap, though they can start to pay themselves off pretty quickly.

This article is going to cover not only why you might want to use solar panels but all the benefits they provide. You will also find a helpful guide on which solar panels would be best for you and your budget. Hopefully, by the end, you will feel confident in your decision to install solar panels on your sailboat and even have an idea of which ones you might like.

Table of contents

Are solar panels on sailboats necessary?

Whether or not you should be installing solar panels on your boat is a matter of choice, not out of necessity. Sailboats get their power from the wind, by harnassing it in their sail. So if you plan to be sailing for the afternoon you probably don’t need solar panels.

You could charge a battery pack from the marina and that will probably see you through several trips. The problems only really start to arise if you are planning to be on your sailboat for longer periods, or even permanently. If you plan to live on your sailboat year-round, even if you spend 80% of it in a marina, you would be better off with some solar panels. Even if it is just as a backup source of power.

Are solar panels on boats safe?

Solar panels are generally pretty safe. They have no moving parts and typically have a very strong protective cover over them so you never come in contact with the electrics themself. So, as a source of power, they are generally pretty safe. The only time they may become unsafe is if they are badly damaged.

Solar panels are often covered by glass plating that keeps them safe. It also helps them absorb sunlight and warmth. This is great, except when the glass breaks. If the glass protective cover on your solar panels should crack and splinter you are at risk of serious injury from sharp shards of glass. Not only is the glass itself dangerous at this point, so are the electronic components inside. They have powerful currents running through them, and if you come in contact with them you may be in for a shock.

Furthermore, if these electronics get wet they can become deadly. Electricity and water do not mix well at all. Being as you are on a sailboat, at sea, the chances of them getting wet is very high. Luckily, the chances of them breaking in the first place are slim to none. The only real way they would break, besides vandalism, is by debris hitting them during a bad storm. There is not often debris at sea, so this shouldn’t be too much of a problem.

What are the benefits of having solar panels on a sailboat?

There are so many great benefits of having solar panels on a sailboat. They can be a lifesaver if you find yourself at sea for a long time. There benefits range from trivial comforts to being the difference between life and death. Here are some of the benefits you might not have considered about having solar panels installed on your sailboat.

Money-saving

Solar panels are not cheap, it is far cheaper to just run a generator or charge your batteries from the marina the whole time. At least, it is in the short term. Over time, it can start to become very expensive. With solar panels, you are looking at a big initial cost (the solar panels themself) and then it’s smooth sailing. You don’t need to pay for power again. Solar panels last for about 40 years before they start to become too inefficient at producing power. The cost of a few solar panels upfront compared to 40 years of marina fees and gasoline for a generator is the financially savvy move.

Emergency power

If you find yourself at sea, the wind dies down (or becomes too strong), and you find yourself stuck bobbing around waiting for more favorable conditions you may run into trouble. Depending on how long you are out there, you may find yourself with dead electronics. Be it a satellite phone, radio, or secondary engine (depending on the boat). Having a set of solar panels and a power bank can be a genuine lifesaver in these situations.

Comfort amenities

Whether you are day sailing or making a week-long voyage, having access to the comforts in life can make the whole journey so much more enjoyable. The amenities may not be available to you without having a constant source of power at sea. Having access to a kettle, tv, videogame system, radio or microwave oven may be the only thing keeping you going at rougher times. As exciting as sailing can be, when you aren’t sailing and are just bobbing around it can be quite dull. The sea is beautiful, but there is only so much time you can spend looking at the water before you miss the comforts of land. With solar panels, you can bring those comforts with you.

Eco-friendly

There are only two alternatives to solar panels. A gasoline generator, and taking power from the grid. Neither of these is good for the environment. Luckily, solar panels are a great third option. Solar panels are completely eco-friendly and are great for the environment. This is not just great for the earth, and your conscience, but for the journey itself. If you are running a gasoline generator at sea you are going to be listening to it thrumming away and smell the burning gasoline. Wouldnt you prefer silence and nothing but the smell of the sea breeze?

How much do solar panels cost?

How much solar panels cost is almost entirely tied into both their voltage/wattage and whether or not they are portable panels. Portable solar panels are great for people who don’t spend a lot of time on their boat or are happy enough living off the marina’s power grid. Permanent solar panels, the kind that may need to professionally installed, can end up costing far more. They are also likely to be far superior and you can pretty much forget about them once they are installed.

Portable solar panels will cost just a few hundred dollars each. You will need a few to be sustainable, but that’s not going to be much of a problem. These portable solar panels can just be rolled out on the deck of your boat, weighed down, and then hooked up to a battery pack. The battery itself here is going to be the most expensive part of the whole set up. A decent-sized battery could set you back a $1000. But, when charged fully it will last days. Even with constant use.

Permanently installed solar panels can cost one or two thousand dollars in some cases. The advantage here though is once they are installed that’s it, you can forget about them. You don’t have to put them up, take them down, and find somewhere to stow them every time they need using. They too will need to be hooked up to a battery, the battery is still only going to cost you $1000. If you are installing permanent solar panels because you plan to be making long voyages, it is ideal to have two or perhaps even three large batteries hooked up to your boat. One to run off, one or two for emergencies.

How do I maintain my solar panels?

Solar panels, unlike gasoline generators, are generally pretty easy to maintain. They have no moving parts and are thus pretty self-sufficient. They don’t need taking apart and they last as long as 40 years. That being said, if they do break they need repairing as soon as possible. The exposed electrics can be deadly when water is thrown into the mix. Which, on a boat, is almost always. The glass cover will need replacing and the electronics inside may need repairing, though not always. Don’t ever attempt to do this yourself unless you are experienced at making these repairs. The cost of hiring someone to do it for you is preferable to being dead. Solar panels have very powerful electric currents, that when in contact with water and yourself can be fatal. As mentioned above, these panels rarely break so you will likely not ever run into this problem. If you do, hire a contractor.

Do my solar panels need cleaning?

Solar panels work by converting the light and heat of the sun into useable power. The process itself is rather complicated but the results are simple to understand. That being said, there are some reasons that your solar panels will stop working as effectively. They all revolve around a lack of sunlight. It could be because it is night time. It could be because it is very cloudy. Or, it could be because they are dirty. If solar panels become too dusty, dirty, and become too covered in grime they stop operating at maximum efficiency. This is not as much of a problem at sea, the sea spray stops dust settling. The biggest thing you will need to clean off your solar panels is salt build-up and slime. This is easy enough to do with some warm soapy water. Freshwater, not seawater. You want to be removing as much salt as possible. Salt is corrosive to electronics, so removing it is important. Never clean your solar panels using pressure washers as they can crack the glass.

Which are the best solar panels for sailing?

There are so many options on the market at various price points. Here are three very different options that will all make good choices, depending on your needs. It is important to consider not just price but power output. Spending a lot of money on solar panels now might not feel ideal, but it is the most cost-effective decision.

1. Renogy Starter Kit

This starter kit is going to be perfect for installing on almost any sized boat. There are four solar panels, each can be fitted permanently to the boat. They can be mounted (and unmounted) easily, for your convenience. They do require a flat surface, but they are small enough that that likely won’t be too much of a problem. This starter kit is very middle of the pack price-wise but should provide enough power for a small to medium-sized vessel easily. It is also possible to buy extra panels individually should you need them.

Wattage: 400/4 (100 per panel)

2. Nature Power Rigid

The nature power rigid is a large, powerful, single solar panel. If you are looking for the right panels to power your entire boat comfortably, these are the ones for you. They are very large so they will need a large flat surface area. alternatively, they can be hung vertically from rails. This is an inefficient way of using them, so you would need to buy more this way. Nature power makes various solar panels so you could find some smaller ones of the same brand to supplement it. This one is not so easy to install, you might need to hire someone to install it for you.

Wattage: 165

3. Nature Power Monocrystalline

Nature power makes a portable solar panel that fits inside a special briefcase. It is perfect for stowing away easily and only taking it out when it is needed. It is decently powerful considering its portable, but there is the inconvenience factor of having to set it up each time. If you planned to buy the nature power rigid, buying one of these portable panels might be ideal for supplementing your power supply when it is especially sunny. Though, it may be cheaper for you to just fit more of the Nature Power Rigids.

Wattage: 120

Hopefully, you now have a good idea about whether solar panels would be right for you and your sailboat. Sailing is great, but the lack of power at sea can be dreadfully boring. Luckily, there are so many great options available on the market. Not just the ones mentioned above. Buying a solar panel is an investment, the initial cost is minor compared to the steady return from all the savings you will make.

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Daniel Wade

I've personally had thousands of questions about sailing and sailboats over the years. As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing.

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Adding Solar Power to a Sailboat

• By Emily Fagan
• Updated: October 18, 2019

During our nearly four-year cruise of Mexico, my husband, Mark, and I lived almost exclusively on 555 watts of solar power charging a 640-amp-hour house battery bank. We anchored out virtually every night aboard our 2008 Hunter 44DS, Groovy , and relied on the sun for power. During one 10-week stretch, while we waited for a replacement engine alternator to arrive, our boat’s solar panels were our sole source of power. We had no backup charging system to turn to, and yet we lived and sailed comfortably the entire time. Mounting solar panels on a sailboat was not difficult, but a few key decisions made a huge difference in how effective our panels were.

A solar-power installation on a sailboat is made up of two independent systems: one system to charge the batteries, and another system to provide 120-volt AC power for household appliances. In the charging system, the solar panels convert sunlight into electrical current and deliver it to the batteries via a solar charge controller. Similar to a voltage regulator, the charge controller acts as a gatekeeper to protect the batteries from receiving more current than they need as they are being charged. In the AC power system, an inverter or inverter/charger converts the 12-volt DC power in the battery into 120 volts AC whenever it is turned on.

Panel Positioning and Wiring Considerations

One of the biggest challenges for sailors installing solar power on a sailboat is finding a place on the boat where the panels will be shaded as little as possible. Just a few square inches of shade on one panel can render that panel all but inoperable. Unfortunately, between the mast, radome, spreaders and boom, shadows cross the deck all day long, especially as the boat swings back and forth at anchor.

What’s worse, if the panels are wired in series rather than in parallel, this little bit of shade can shut down the entire solar-panel array. When we installed solar power on Groovy , we had already lived exclusively on solar power in an RV for over two years. Our RV solar panels had been wired in series, and we had witnessed the array shutting down current production when just half of one panel was shaded.

Choosing whether to wire the panels in series or parallel on a boat affects the wire gauge required, which is why many solar-power installers lean toward wiring the panels in series. Panels wired in series can be wired all the way to the solar charge controller with a thinner-gauge wire than those wired in parallel. This is because the voltage of panels wired in series is additive, while the current remains constant, so the current flowing is just that of a single panel. In contrast, the current flowing from panels that are wired in parallel is additive, while the voltage across them is not. This means that in a parallel installation, the current going to the charge controller is several times higher and requires much thicker cable to avoid any voltage loss over the length of the wire.

Not only is thinner-gauge wire less expensive, but it is also more supple and easier to work with, making the job of snaking it in and around various crevices in the boat and connecting it to the solar charge controller much less of a struggle. Thus the choice between series and parallel wiring boils down to a trade-off between system performance, expense and ease of solar system installation.

Luckily, the size of the wire can be reduced if higher-­voltage solar panels are chosen. Since watts are determined by multiplying volts by amps, a higher-voltage panel that generates the same watts as a lower-voltage panel will produce less current. Therefore, selecting nominal 24-volt panels instead of 12-volt panels allows for the use of thinner wire sizes no matter how they are wired.

Our Marine Solar Panel Design Choices

In our installation, we decided to mount three 185-watt, 24-volt (nominal) Kyocera solar panels high above the cockpit, well aft of the boom, as far away as possible from potential shade. Our Hunter came with a big, solid stainless-steel arch, and we turned to Alejandro Ulloa, a brilliant metal fabricator at Baja Naval Boatyard in Ensenada, Mexico, to build a polished stainless-steel solar-panel arch extension onto the existing structure. He designed the arch extension with integrated telescoping davits to hoist our dinghy as well as support the solar panels. These davits were strong enough — and the lines and blocks had enough purchase — that either of us could lift our light Porta-Bote dinghy with its 6-horsepower outboard without a winch.

We spaced the panels about a half-inch apart and wired them in parallel. Using two twin-lead wires, we snaked the three positive leads and one common ground down through the inside of the arch tubes so they wouldn’t be visible, and placed wire loom over the exposed wires under the panels.

The junction points for the three parallel panels were on positive and negative bus bars inside a combiner box, all mounted in a cockpit lazarette. Inside the combiner box, we installed three breakers, one for each panel. This gave us the ability to shut off any or all of the panels if we needed to (we never did).

We mounted a Xantrex solar charge controller (model XW MPPT 60-150) in a hanging locker, as close to the batteries as possible, in a spot where it was easy to monitor and program. We ran twin-lead wire from the combiner box to the charge controller and from there to the batteries.

Our boat came with three new 12-volt Mastervolt 4D AGM house batteries, all wired in parallel, for a total of 480 amp-hours of capacity. We wanted a bigger house battery bank, and because it is best for the age, type and size of the batteries to be matched, we added a fourth new Mastervolt 4D AGM house battery, which brought our total to 640 amp-hours. Our batteries were installed at the lowest point in the hull, below the floorboards, and they ran the length of the saloon, from just forward of the companionway stairs to just aft of the V-berth stateroom door.

The best way to charge a bank of batteries that are wired in parallel is to span the entire battery bank with the leads coming from the charge controller. We did this by connecting the positive lead from the charge controller to the positive terminal of the first battery in the bank, and the negative lead from the charge controller to the negative terminal of the last battery. By spanning the entire bank, the batteries were charged equally rather than having the charging current focused on just the first battery in the bank.

We feel that AGM batteries are superior to wet cell (flooded) batteries because they can be installed in any orientation, don’t require maintenance, can’t spill (even in a capsize), and charge more quickly. Our Mastervolt batteries, like almost all AGM batteries on the market, are dual-purpose, combining the very different characteristics of both deep-cycle and start batteries. Our batteries work well, but if we were doing an installation from scratch today, we would consider the new Trojan Reliant AGM batteries. These batteries are engineered strictly for deep-cycle use and have been optimized to provide consistent current and maximize battery life.

Our boat came with a Xantrex Freedom 2,500-watt inverter/charger wired into the boat’s AC wiring system with a transfer switch. The inverter/charger performed two functions. While the boat was disconnected from shore power, it converted the batteries’ 12-volt DC power into 120-volt AC power, allowing us to operate 120-volt appliances, like our microwave. When the boat was connected to shore power, it charged the batteries.

Because this inverter/charger was a modified-sine-wave inverter, mimicking AC ­current with a stair-stepped square wave, we also had a 600-watt pure-sine-wave inverter to power our potentially more sensitive electronic devices. We chose Exeltech because its inverters produce an electrical signal that is clean enough to power medical equipment, and they are NASA’s choice for both the Russian and American sides of the International Space Station. For simplicity, rather than wiring the inverter into the cabin’s AC wiring, we plugged ordinary household power strips into the AC outlets on the inverter and plugged our appliances into the power strips. Like the charge controller, the inverter must be located as close to the batteries as possible. Ours was under a settee.

Shade’s Impact on Sailboat Solar Panels

Once our solar installation was completed on our sailboat, we closely observed the effects of shade on our solar-panel array. We were often anchored in an orientation that put the panels in full sun. Just as often, however, we were angled in such a way that shade from the mast and boom covered portions of our panels. It was fascinating to monitor the solar charge controller’s LCD display whenever the sun was forward of the beam — the current from the panels to the batteries fluctuated up and down as we swung at anchor.

Taking notes one morning, we noticed that the charging current was repeatedly creeping up and down between 9.5 and 24.5 amps as the boat moved to and fro. When the entire solar-panel array was in full sun, it generated 24.5 amps of current. When we moved so the mast shaded a portion of one panel, the array generated 15 amps. When it shaded portions of two panels and only one was in full sun, the array produced just 9.5 amps. Of course, it would have been preferable to see a steady 24.5 amps all morning, but this sure beat watching the current drop to zero whenever a shadow crossed a panel.

We discovered that shade makes a huge impact while sailing, too. Surprisingly, it is far worse to have the panels shaded by the sails than to have the panels in full sun but tilted away from its direct rays. One afternoon, we noticed that while we were on a tack that tilted the panels away from the sun, they generated 24.5 amps of current, whereas on a tack where the panels were tilted toward the sun but two of the three were partially shaded by the sails, the current dropped to a mere 10 amps.

Reflections On Our Solar Panel Installation

A wonderful and surprising side benefit of our large solar panels and arch system was that the setup created fabulous shade over the jumpseats at the stern end of the cockpit. Our metal fabricator, Alejandro, placed a support strut at hand-holding height, and sitting in those seats feels secure and comfortable while sailing, no matter the conditions.

After living on solar power for eight years of cruising and land-yacht travel, we’ve learned that you can never have too much solar power. Groovy’s 555 watts was enough to run all our household appliances as needed, including our nearly 4-cubic-foot DC refrigerator, two laptops, a TV/DVD player, and lights at night. However, it was not quite enough power to run all that plus our stand-alone 2.5-cubic-foot DC freezer during the short days and low sun angles of the winter months without supplemental charging from the engine alternator every few days. For the 10 weeks that we did not have a functioning alternator, our solution was to turn off the freezer, which enabled our batteries to reach full charge every afternoon.

Solar power made a world of difference in our cruise. Not only did it allow us to live comfortably and with ample electricity for weeks on end when our engine alternator went on the blink, but as a “set-it-and-forget-it” system, it also gave us the freedom to anchor out for as long as we wished without worrying about the batteries. In our eyes, the solar-panel arch enhanced the beauty and lines of our boat, giving her a sleek and clean appearance. It was true icing on the cake to discover that the panels and arch system also provided much-needed shade over the cockpit and helm from the hot tropical sunshine. If you are preparing for a cruise, consider turning to the sun for electricity and outfitting your sailboat with solar power.

The Installation:

Emily and Mark Fagan offer cruising tips and share their stories and photos on their website, roadslesstraveled.us . They are currently enjoying a land cruise across America aboard an RV.

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Sailboat Solar Systems and How-To

Solar on a sailboat goes together like hands and gloves, but sailboat solar systems can be installed in a variety of ways. The solar components themselves create an infinite combination of possibilities for off-grid sailing. Victron Energy chargers, Renogy Panels, Sunpower Yachts, BlueSea Systems, and many more brands have entered the marketplace, and that’s not including the lithium battery companies.

To simplify things, we’ve compiled three sailboat solar systems videos to give you an overview of what’s possible. And to help you decide on your own simple solar panel setup for sailing.

How-To Install Solar Panels on Your Sailboat

This system from Zingaro shows flexible panels summing 300w of power on a 38′ catamaran.

300W Solar System:

• Three 100w solar flexible panels
• 1 MPPT Solar charger controller

View on Amazon >>

100W HQST Flexible Solar Panels $100-$200

20amp Solar Charge Controller by Victron Energy $150-$200

Simple Sunpower Solar System

This simple solar system from The Fosters shows a quick and easy setup with limited space on top of a bimini.

Sunpower Solar Panels are considered by most in the industry as the gold standard. They use the highest-efficiency solar cells and have top-notch build quality. In this simple installation, three 50w panels are just enough to get you started. Plus, it’s the most affordable installation!

150w Starter Solar System

• Three 50w Flexible Solar Panels
• A Single 15amp solar charge controller

50W Sunpower Solar Panels $150-$200

75v/15amp Solar Charge Controller by Victron Energy $100-$124

Off-Grid on a DIY Solar Powered Sailboat

Here’s a special installation that turned a derelict sailboat into an off-grid sailing machine!

Simon has transformed this derelict sailboat into an epic off-grid solar-powered and fossil-fuel-free cruising catamaran. He’s been living aboard and renovating the boat for the past 3.5 years We’re excited to show you the transformation as well as how he plans to propel the boat without the use of diesel or fossil fuels!

5280w Solar System for Electric Powered Catamaran

• 16 Rigid solar panels (330w each)
• 20kwh of Lithium Batteries

240W Rigid Solar Panels $250-$300

200AH Lithium 4d Battery $1200-$1200

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9 Best Solar Panels for Sailboats

As an Amazon Associate, we earn from qualifying purchases. We may also earn commissions if you purchase products from other retailers after clicking on a link from our site.

Solar panels have become game changers when it comes to supplying power while off the grid. Marine solar panels can charge anything from batteries to computers to bigger electronic appliances. What are the best solar panels for sailboats? 

The 9 best solar panels for sailboats are: 

• Renogy Flexible Solar Panel
• Newpowa Solar Panel
• SunPower Flexible Sol ar Panel
• Eco-Worthy Off-Grid Solar Panel
• Rich Solar Polycrystalline
• Topsolar Flexible Solar Panel
• HQST Monocrystalline Solar Panel
• WindyNation Solar Panel Complete Off-Grid
• DOKIO Solar Panel Kit

This article will explore everything you need to know about the best marine solar panels. 

Table of Contents

Solar Panels on Sailboats: An Overview

Before exploring the best solar panels, it is helpful to consider how solar panels on sailboats work and how many you need. Solar panels sit on different parts of a sailboat’s surface and absorb the sun’s rays, converting them into energy. This energy is used to power chargers, fridges, cooking stoves, and other electronics you need for self-sufficient sailing. 

Worth noting is that today we will only discuss solar panels and not the batteries, which of course is an essential part of a complete system; we will also not discuss charges or charge controllers.

The products in this post will get you started in the right direction, but if you’re looking for a high-output system, then I suggest you contact someone that can help you calculate your energy requirements.

How Many Solar Panels Do I Need for My Sailboat?

You will need between 2-8 solar panels for your sailboat. The exact amount depends on your sailboat’s space and how many electronics you need to power. Most solar panels can absorb between 100-300 watts per hour. On average, you will need approximately 1500 watts of power each day. 

If your solar panels absorb 1500 watts daily, here’s what they can power on your sailboat: 

• A laptop charger
• A microwave 
• A coffee maker 
• An induction cooker 

If you want to power more heavy-duty electronics like a washing machine or a television, look for solar panels that absorb 400 watts. For heavy-duty electronics, try installing 5-8 solar panels. 

Flexible vs. Rigid Solar Panels

The three main types of solar panels are rigid panels, flexible panels, and semi-flexible panels.

Rigid panels are surrounded by aluminum and made with sturdy tempered glass. They are resilient against various weather conditions but require flat space to install. 

Semi-flexible panels can be slightly bent to fit the shape of the installation surface. However, they can’t absorb a lot of power. 

One very common type of solar panel used on boats is the flexible panel . Flexible panels are thin and lightweight, and, as their name suggests, they can be added to a wide variety of surfaces. 

Here are the pros of flexible panels: 

• They are thin and light. Flexible panels are approximately one-eighth the weight and size of rigid and semi-flexible panels. This allows you to add them to various sailboat sizes and surfaces. It also reduces the load on your sailboat. 
• They are easy to install. Flexible panels are easy to work with and can be self-installed by following the instructions that come with the panels. Meanwhile, rigid and semi-flexible panels may require expert installations. 
• They’re sturdy. Despite being light, flexible panels can bear a lot of pressure – you can easily walk over them. 

However, there are also some drawbacks to using flexible solar panels: 

• May fly away . As flexible panels are fragile, they can easily be dislodged and fly away, especially in strong winds. 
• Vulnerable to scratches . While flexible panels can bear much weight, they may get scratched more easily. Over time this may affect their functionality. 
• Not easy to reposition. Flexible panels are generally adhered to the surface of a sailboat using a specially prepared adhesive. Because of this, it is challenging to reposition the solar panels when there is a change of season.
• Less efficient. Flexible solar panels don’t convert energy to electricity or rigid panels. It may be harder to power heavy-duty appliances from a flexible solar panel. 

How Many Panels Can I Fit on a Sailboat (Catamaran and Monohull)?

The amount of panels you can fit on your sailboat depends on the size of the panels and the surface space you have available. 

You can fit at least two 400W panels on a Monohull and at least four on a Catamaran around 35ft in length. You will be able to fit 4-8 more solar panels if you add a solar panel bracket at the stern. 

Renogy Flexible Solar Panel 100W

Renogy is a popular solar panel producer that designs high-quality solar panels. The Renogy Flexible Solar Panel is specially designed for marine vehicles, including sailboats. 

Here are the best features of this solar panel: 

• Flexibility . These solar panels are fragile, making them flexible and easy to mount on served surfaces. 
• Easy to install. These are made with high-quality Monocrystalline, allowing them to be easily bent and easy to install. 
• Lightweight. One solar panel weighs only 4 pounds, ensuring that no extra pressure or weight is displaced on your boat. 
• Durability . User reviews have noted that these panels are highly durable and can last you a few years. 
• Users have noted that these panels do not have the best outputs. They also can’t be stacked, which impacts their accessibility. To ensure that these panels can be connected, you may purchase extra extension cords. 

Newpowa Rigid 160W Solar Panel

The Newpowa Right Solar Panel is a new design with a maximum power of 160W. It is weather-resistant and can be used on various surfaces and vehicles. 

Here are the pros of the Newpowa Solar Panel: 

• Weatherproof . The design features of this solar panel ensure that it survives under a range of different weather conditions. It has a heavy-duty frame preventing it from strong wind and waves. Its mainframe has a further layer of protection for the Junction box. 
• Long warranty . Newpowa offers a 25-year transferrable output power warranty. 
• Easy to install . These solar panels are made with mono cells and bypass diodes. Consequently, the solar panels can be immediately unpacked and are ready to install. 
• High wattage. As these solar panels have 160 Watts of power, you need less of them to power all the devices on your boat. 
• If you are planning on buying the Newpowa Solar Panel, you should note that they only make rigid panels. As a result, you may find it to be difficult to install them on curved spaces.

SunPower 110W Flexible Solar Panel

SunPower’s Flexible Solar Panels are made with high-quality materials ensuring durability. They are especially ideal for sailboats as their warranty also covers saltwater damage. 

Here are the standout features of the SunPower 110W Flexible Solar Panel: 

• Flexibility . This solar panel can be bent up to 30 degrees, making it easy to install on various surfaces. 
• Easily portable. These solar panels are incredibly lightweight (4.4 pounds or 2 kilograms) and can be easily uninstalled and transported. 
• Extended warranty . SunPower offers a five-year warranty on power and a two-year warranty on the product. The warranty includes damage caused by saltwater which many other solar panel warranties do not. 
• Some users have noted that the output quality of these solar panels deteriorates over time. However, you can use the extended warranty to address any quality deterioration. 

ECO-WORTHY Rigid 25W Off-Grid Solar Panel

This is a rigid, 25-watt solar panel that is waterproof, making it ideal for your boat. It is highly durable and has inbuilt indicators that highlight the battery’s status. Its low output makes it only suitable for charging phones or smaller electronics.

Here are some notable features of the Eco-Worthy Solar Panel: 

• Ease of use. This solar panel is easy to install and requires no maintenance. 
• Warranty. Eco-Worthy offers one year of warranty on all of its products and free maintenance if needed. 
• USB control. This solar panel is attached to a USB control panel, preventing it from overcharging and getting damaged. 
• Waterproof. All solar panel parts are entirely waterproof and can handle exposure to both saltwater and freshwater. 

Some of the drawbacks to this solar panel include: 

• Low watt absorption. Unlike many of the other solar panels on this list, this one can only absorb up to 25 watts of power at a time. So, it can only power smaller devices like batteries. 
• Instruction manual. Some users have noted that the instructions to set up the Eco-worth solar panel are confusing for beginners. If you have never installed solar panels before, it’s best to call in an expert to help. 

RICH SOLAR 100W Rigid 12V Polycrystalline

This 100W rigid solar panel is designed to absorb energy even in low light conditions. It is easy to install and ideal for marine environments. 

Here’s why you should consider buying Rich Solar Panels: 

• Works well in low light. This solar panel has been tested in various low light conditions, including cloudiness and during sunrise and sunset. It is certified to be able to harvest energy in low light conditions. 
• Extended warranty. Rich Solar Panels offers a 25-year warranty on limited power output and a five-year warranty on quality. 
• Water and weatherproof . The Rich Solar panels have used selective design elements to ensure they are water-resistant. They have high transparency and are made with tempered glass to withstand high winds and water pressure. 
• Cost-effective . These are significantly cost-effective, making it easy to equip your sailboat fully. 
• While solar panels can easily resist strong winds and water, they can be vulnerable to hail. Hail storms can cause dents on the solar panels, which can eventually cause damage. 

Topsolar Flexible 100W Solar Panel

Topsolar provides premium flexible solar panels that are easy to move and install. They are ideal for installing on water vessels like sailboats with waterproof materials. 

Here are some of the pros of choosing the Topsolar Flexible Solar Panel: 

• Flexibility . The arc radius of this solar panel is 16 inches (40 centimeters) and can be bent to fit several curved surfaces allowing your solar panel to harvest the most sun. 
• Efficiency . These solar panels are made with ETFE (ethylene tetrafluoroethylene) materials. They are extremely energy efficient and can rapidly convert energy. 
• Some users have noted that these solar panels don’t have as long a life as other panels. In addition, some panels may only be able to absorb up to 75 watts of power at a time. 

HQST Rigid 100w Monocrystalline Solar Panel

This is a 100-watt solar panel that has been specially designed to perform well in low light. It is made with high-quality materials and is ideal for sailing boats as it is durable even in unfavorable weather conditions. 

Here are the pros of installing the HQST Solar Panel: 

• Durability . These solar panels are designed to withstand strong winds and snowfall. They’re made with tempered glass and aluminum and are resistant to corrosion, ensuring longevity. 
• Testing and warranty. Each solar panel is quality tested before it is distributed. It also comes with a three-year warranty. 
• Easy to install . While these are rigid solar panels, they have pre-drilled holes, making them easier to install. 

WindyNation 100W Solar Panel Complete Off-Grid

As its name suggests, this solar panel is designed for off-the-grid living and is helpful if you need to access power when you’re in the middle of the sea. 

Here is why you should consider the WindyNation Solar Panel: 

• Includes a charge controller. This controller lets you quickly see the amount of power the solar panel has absorbed. 
• High power. Several positive user reviews have indicated that this solar panel is highly efficient in absorbing and converting power. 
• This solar panel is more expensive than many others on the market.

DOKIO 300W 18V Portable Solar Panel Kit

If you are looking for a heavy-duty solar panel, the Dokio Solar Panel Kit is excellent. It can absorb a lot of energy and power a wide range of appliances on your sailboat. 

Here’s why you should consider this solar panel: 

• Versatile and flexible. While this is a rigid solar panel, it can be folded, making it easy to transport and install. 
• High efficiency. This solar panel is highly efficient at converting energy into power. As it absorbs up to 300 watts, you can install just two of these panels to get significant energy. 
• Some users have noted that this solar panel does not work well in low-light conditions. You may want to have a backup solar panel for days when it’s rainy and windy. 

Here are Some of My Favorite Catamaran Cruising Resources

Thank you for reading this article. I hope you found it helpful as you hopefully start your sailing adventures. Here are some resources that I use as a sailor that I hope you’ll also find helpful. These are affiliate links, so if you do decide to use any of them, I’ll earn a commission. But in all honesty, these are the exact things that I use and recommend to everyone, even my own family. Sailboats: If you’re looking for the best boat to suit your needs, I would recommend a catamaran. If you’re interested, I can show you the differences between catamarans and other types of sailboats .

Books:  For getting started, I really like  Cruising catamarans made easy . It is actually a textbook from the American sailing association; it is used to get a cruising catamaran certification. There are some other great books, and I have compiled a list of books about cruising catamarans that you will find useful.

Communication:  Being out on adventures, whether it be sailing or climbing mountains, good communications are essential to being safe. I recommend two things Google fi (incredibly simple cellular data all over the world) and Garmin inreach mini (for text and voice in remote areas without cell coverage)

Sailing courses: Online sailing courses are great for beginners starting out their sailing career; it’s an efficient way of learning the basics of navigation, throttle controls, and maritime safety. I suggest starting with two free courses from NauticEd .

To see all my most up-to-date recommendations,  check out this resource  that I made for you!

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

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• Solar on the go

Picking the best solar panels for a sailboat: Buyer’s guide

• 18 Aug 2022

You might have already heard of brave sailors that conquer the oceans with nothing but wits and solar panels. For instance, this year 83-year-old Kenichi Horie became the oldest person to sail solo from the US to Japan on a solar-powered boat. These stories are inspiring, but picking panels for your boat yourself can be a small challenge in itself. That’s why we wrote a short article about the best solar panels for sailboats and how to recognize them.

Start from type of solar panels

When it comes to solar panels for sailboats, their weight and size matters more than with PV modules for residential systems. Efficiency is important but power — not that much, because the energy needs of a boat are relatively low. The first thing you’ll have to decide about your panels is their type.

Generally, you’ll choose between thin-film panels and monocrystalline modules. While polycrystalline panels are still around and they are indeed cheaper than mono panels, they are much less efficient, which means they’ll need more space and add more weight to your boat.

Thin-film panels are light and cheap

Thin-film or flexible solar panels bend well and they are very easy to install which makes them a great choice for boats with difficult configurations. Some sailors say that flexible panels are the best choice for fast boats because they don’t impact the aerodynamics of a vessel as much as rigid panels do.

The downside of flexible panels is their low wattage. If there are many appliances on board, you’ll need several panels and you’ll need to find the right place for each of them. They also age faster than rigid panels — a thin-film panel generally lasts for 10-15 years.

Monocrystalline panels are powerful and reliable

Rigid solar modules, monocrystalline and polycrystalline, are heavier and bulkier than thin-film panels. You can fix flexible panels with adhesives, but rigid panels require drilling. They are also more expensive than flexible panels. 

On the other hand, monocrystalline panels are the most efficient type of panels which means that they provide more power for less space. Even one powerful mono panel can be enough for everything that you’ve got on board. They are also much more reliable and will survive any storm that is coming your way. A monocrystalline panel lasts for at least 25 years.

Panels for boat should be efficient and sturdy

The best solar panels for sailboats don’t have to be powerful, but they better be efficient — find the number in the datasheet. For rigid panels anything over 18-19% is fine. Panels also should be sturdy enough to withstand seastorms. You generally also want good shading tolerance since panels often get shaded by masts and sails. Finally, good performance in low-light conditions is appreciated.

Picking bifacial panels, 72/144-cell panels or larger, anything too powerful generally doesn't make a lot of sense. Performance at high temperatures matters less than it does with home systems. Warranties also play a lesser role. You won’t be able to make use of them because they generally have effect only for residential installations.

The markets of thin-film and rigid panels are different. Generally, a manufacturer of flexible panels doesn’t offer mono- or poly-panels. Canadian Solar, Q CELLS and Jinko Solar are good choices when it comes to monocrystalline modules for boats. Renogy , WindyNation and PowerFilm make fine thin-film panels.

Do the math before purchase

The amount of power for your boat depends on the number of appliances on your board. There are two main ways to determine the size of installation that you need. You can take a test trip and see how much of your battery’s charge you’ve spent in one day. You can also do the calculations manually: write down all the appliances on the board with their power rating and number of hours in use per day. You can read about it in detail in our article " How much solar power to sail the seas? " It doesn’t make sense to oversize a marine PV system, because all the excess power will just go to waste.

Keep in mind that adding photovoltaics doesn’t make your vessel a solar boat, unless you have a solar-powered motor. You can switch your boat to solar energy fully, especially if it’s small, but you’ll have to calculate your energy needs accordingly.

Once you’ve purchased your panels, you’ll have to install them properly. You can order professional service or do it yourself. The most popular places for solar panels on a boat are a stern rail, masts, deck and canvas. Thin-film panels can even go on the sails. Ideally, you want a place where panels wouldn’t be shaded by masts on any other parts of a boat.

List of solar panels for a sailboat

We’ve asked our engineer to pick the panels that would complement a small boat well. These are his choices:

ZNShine Solar ZXM6-NH120-370/M

Solar panels from ZNShine Solar are inexpensive and fit all kinds of applications, including boat systems. ZXM6-NH120-370/M provides 370 Watts of power with a 19.88% efficiency. It performs well in low-light conditions. Graphene coating increases power generation and allows self-cleaning. The only downside is a lower wind tolerance, compared to other models: it is rated to withstand 2400 Pa pressure which is comparable to 140 mph wind.

Mission Solar MSE345SX5T

MSE 345 is a simple solar panel for all kinds of applications, including boat installations. Mission Solar panels are manufactured in Texas. The module provides 345 Watts of power with 18.7% efficiency. It is certified for high snow (5400 Pa) and wind loads (4000 Pa). The model is resistant to salt mist corrosion.

Suntech STP 365 S

Suntech is a Chinese company that offers quality budget-friendly solar panels. The STP365S model stands out in line because of its great performance in weak light, such as cloudy weather and mornings. It is designed to withstand harsh weather conditions, and the module is certified to tolerate wind of over 170 mph. Half-cut design makes cells sturdier and improves shading tolerance. Overall, this panel earns a place among the best boat solar panels.

Andrey had been a news editor and freelance writer for a number of medias before joining A1SolarStore team. Climate change and its impact on people's lives has always been among his interests and it partially explains his degree in Philosophy and Ethics.

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What You Need To Know About Boat Solar Panels

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Sunshine and boats are a natural together, so why not use all that free energy? Here’s the lowdown on solar panel selection and installation

I first embraced the idea of solar power while up a pole (literally) in the Atlantic Intracoastal Waterway replacing dead batteries. It was the early 1980s, and I was maintaining buoys, beacons, and other such Aids To Navigation (ATON) for the U.S. Coast Guard, replacing massive, nonrechargeable batteries with rechargeable solar-powered ones. The higher-ups said the solar rechargeables would last six years – twice as long as the one-shot batteries. As the deck-ape in charge of lugging all those batteries up and down the ladders, my back and I immediately appreciated the whole “free power from the sun” thing, a concept I continue to embrace.

The strategy behind s olar energy onboard is simple: A solar panel converts sunlight into electricity, after which wiring conducts it to your batteries for storage until needed. Solar panels are used to keep batteries or banks charged rather than to power equipment directly. This arrangement allows the panels to store generated power whenever produced, while providing a steady source of power to a piece of equipment even when the panel is producing no power.

While they do require an initial outlay, solar panels can easily pay for themselves in money saved and independence gained over their service life. They’re noiseless, have no moving parts, and they provide free electricity for years with minimal maintenance. Solar panels also have the benefit of being modular, letting you start small and add more as your power requirements increase.

The benefits of solar

Almost any boat can benefit from solar power. Whether at a slip, mooring, or on a trailer, boats can keep their batteries topped off without the need for external power. You can also use solar power to supplement or even replace other onboard charging sources, reducing or eliminating the need to run engines or generators to keep batteries topped off (a wasteful practice that burns fuel while wearing down the costliest pieces of equipment onboard).

While underway, it’s a plus to be able to recharge a dead battery in an emergency – say, to operate a VHF radio or navigation gear. While dockside, solar panels keep batteries charged and vital systems (such as bilge pumps) up and running without the need for shore power.

Just about any boat can benefit from solar power, whether it’s to keep batteries topped off or supplement other onboard charging sources.

Mount solar panels where they are exposed to maximum sunlight but do not interfere with operation of the vessel. 

Bottom: Something as simple as the shadow of a line or shroud can reduce or halt output.

Types of panels

Solar panels contain photovoltaic cells – small silicon semiconductor devices that convert sunlight into electricity. Each cell generates between 0.45 and 0.5 volts, depending on exposure to direct sunlight. Cell size determines amperage, with a 3-inch cell producing roughly 2 amps, a 4-inch cell a little over 3 amps, and a 5-inch cell around 5 amps.

Construction-wise, the three main types of solar panels are monocrystalline, polycrystalline, and amorphous (or thin-film) technology.

Monocrystalline panels have been around the longest and remain the most popular. The panels are constructed of thin slices of crystal silicon (each cell is cut from a single crystal) housed in a rigid, aluminum frame and covered with tempered shatterproof glass. The panels have a uniform black, blue, or gray appearance and are generally quite rugged, although they can be cracked or broken if subjected to extreme abuse.

Monocrystalline panels have the longest service life of the three types. With a conversion efficiency of around 17%, they’re also the most efficient and have the highest electrical output per area, but they are also the most expensive.

Polycrystalline cells are sliced from a cast silicon block and have a shattered glass appearance. Built in much the same way as monocrystalline panels, they’re rectangular, giving the panel itself a tiled look. Their life span is similar to monocrystalline panels, and while their conversion efficiency is lower (by 14%), they’re also a bit less expensive.

Amorphous panels are made by placing a thin film of active silicon on a solid or flexible backing (such as stainless or aluminum sheeting) depending on whether the panel is to be rigid-framed and glass-fronted or flexible. Flexible amorphous panels, in which cells are sandwiched between rubber and polymer covers, are light and tough enough that you can walk on them and, in some cases, even roll them up for storage.

This type of solar panel is also better if shade is an issue. With crystalline panels, even the thin shadow of a rope or shroud across one cell can reduce or halt output of an entire module. Amorphous panels have “bypass” diodes that essentially turn off shaded cells and provide a current path around them. Some monocrystalline panels also have bypass diodes, but this feature comes at an increase in cost.

Amorphous panels are the least expensive of the three types, but their efficiency is also lower – around 8%, or roughly half that of a monocrystalline type. This lower output is somewhat mitigated in newer panels, however, which use three-layer construction. Each layer absorbs different colors of the solar spectrum, so the panel will deliver more power longer each day and during lower light conditions than the other two types.

The charge controller should be mounted below decks and as close to the battery as possible. 

Follow manufacturer instructions for wire connections.

Planning the system

While factors such as cost, mounting options, and output are important, a successful installation depends on knowing what you want the system to accomplish. Is the goal to float-charge a single battery or supplement an overall vessel energy plan? Answering these questions up front will help determine the type, size, and number of panels required.

To understand the process better, let’s walk through the basic steps to determine power requirements and installation considerations for a single solar panel installation. While the example itself is simple, the steps are the same used to plan more complicated installations.

For our example, the goal is to install a solar panel to provide charging for a single 12-volt, 100-amp-hour wet-cell battery used to power an automatic anchor light on a moored vessel.

The first step is compiling a daily power consumption estimate to determine how much solar power is needed.

The daily self-discharge rate for a wet-cell battery is roughly 1%, meaning our 100-amp-hour battery requires one amp every 24 hours just to maintain the status quo. The anchor light draws 50 milliamps per hour of operation, and we’ll assume it operates 10 hours each night. Multiplying current draw (50 milliamps) by hours of daily operation (10) generates a daily energy expense of 500 milliamps or .5 amps.

This means our solar panel must meet a minimum daily energy tab of 1.5 amps – one amp of battery self-discharge rate plus .5 amps of power draw for the anchor light.

Next up is figuring out panel size and the best mounting location. For our example, let’s assume the panel will be a horizontal, fixed-mount installation. A 10-watt horizontally mounted panel should generate between 3- and 5-amp hours per day.

We’ll need at least 13 volts to fully charge our 12-volt battery. As most solar cells generate at least 0.45 volts, you’ll want a panel with a minimum of 33 cells, which should provide around 14.85 volts.

Keep in mind that’s the minimum needed, which may not be enough once you factor in a few cloudy days. Most panels are designed to generate between 15 and 20 volts to overcome problems like cloudy days or inherent electrical resistance within the panel or installation components. While this higher voltage lets you make up for less electrically productive days, it also means you’ll want to install a solar charge controller (voltage regulator) to avoid battery damage due to overcharging.

Attempts to plan a system that tries to use the output of the panel and capacity of the battery to prevent overcharging (and avoid the installation of a charge controller) is false economy and should not be done. The system will never meet its full output potential and, worst case, can damage the battery due to overcharging.

A word on ‘charge controller confliction’

If your vessel has multiple charging sources, such as solar panels and a wind turbine, a crucial but often overlooked consideration is “charge controller confliction.” In short, this is an issue where the charge controller for your solar panel and the charge controller for your wind turbine are internally adjusted to the same maximum charge voltage set point. This means they are constantly fighting each other to be the dominant power source, which results in diminished overall charging output and performance. An in-depth article on this issue can be found at ­missioncriticalenergy.com (in the website footer, click “Superwind Turbine Manuals & Technical Bulletins.” Under the header “Charge Controllers,” select the document “Resolving Charge Controller Confliction”).

While this article addresses charge controller confliction at remote, off-grid sites, the information provided is also applicable to vessel installations. — F.L.

Location and mounting

Solar panels should be mounted in a location where they are exposed to the maximum amount of sunlight but do not interfere with operation of the vessel or the movement of passengers and crew. Solar panels will typically be either fixed or mounted on some type of movable bracket that allows you to actively point the panel toward the sun for maximum output. Both methods have their pros and cons. Fixed panels (which are normally mounted horizontally) don’t produce as much power as a panel that can be adjusted to face the sun. The downside is that adjustable panels must be aimed throughout the day to maximize their output.

Use good quality, marine-grade heat shrink connectors (top) and liquid electrical tape (right) to create airtight, waterproof seals and reduce corrosion.

Installation

After choosing and mounting your panel, it’s time to connect it. The first thing you need to determine is the size (gauge) of the wiring to be used. Multiply your panel’s rated amp output by 1.25 (which adds a 25% safety factor). Then measure the length of the entire wiring run, panel to battery, and multiply by 2. Once you have these two numbers, refer to the American Boat and Yacht Council’s (ABYC) 3% voltage-drop table for wire size. Ancor Products offers a handy wire calculator on its website ( ancorproducts.com/resources ).

Always use good quality marine grade connectors  and tinned, multi-stranded copper wire with vinyl sheathing. The wire will run from the solar panel to the charge controller first, then to the battery. Try to keep the wire run as short as possible, and if it transits an external deck or cabin house (it likely will), be sure to use an appropriate weatherproof deck fitting.

The charge controller should be mounted below decks and as close to the battery as possible. You’ll always want to follow the manufacturer’s instructions for connections, but in a typical installation you’ll connect the solar panel’s positive (red wire) lead to the charge controller’s positive input wire or terminal and the negative (black wire) lead to the charge controller’s negative input wire or terminal.

Next, connect the charge controller’s negative output to the battery negative terminal and the controller’s positive output to the battery’s positive terminal via an appropriately sized in-line fuse (or circuit breaker). ABYC recommends these be installed within 7 inches of connection to the battery or other point in the DC system. To reiterate, the installation of the charge controller can vary among models, so follow the manufacturer’s installation instructions.

Finally, ensure all connections are waterproof and secure any loose wire runs with wire ties and cable clamps for a neat installation. Then get ready to lean back and soak up some free sun.

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Frank Lanier

Contributing Editor, BoatUS Magazine

Capt. Frank Lanier is a SAMS-accredited marine surveyor with over 40 years of experience in the marine and diving industries. He’s an author, public speaker, and multiple award-winning journalist whose articles on boat maintenance, repair, and seamanship appear regularly in numerous marine publications worldwide. Contact him via his YouTube channel “Everything Boats with Capt. Frank Lanier” or at captfklanier.com.

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Yachting Monthly

• Digital edition

Everything you need to know about yacht solar power

• Dennis O'Neill
• May 23, 2024

Marine solar panels are becoming more efficient and eco-friendly. Dennis O’Neill reports on the latest design advances

Keeping your batteries topped up without having to run the engine is a continuous challenge for cruising sailors, especially those who are highly conscious of their carbon footprint or just wanting to cruise ‘off grid’.

Solar panels have been a good option for sustainable sailing in sunny conditions for some time, being almost maintenance-free and, unlike wind generators, silent. However, maritime conditions are a harsh test for even the best of them due to the incessant exposure they face from saltwater spray and, ironically, ultraviolet (UV) energy.

Now, though, new solar panel technology coming over the horizon promises further improvements in both their efficiency and ease of use.

Silicon cells

Most solar panels use silicon-based photovoltaic cells, with the most efficient type within this class being monocrystalline cells, made from a single pure ingot of silicon. Polycrystalline silicon cells, made from multiple silicon crystals bonded together, perform almost as efficiently as monocrystalline cells but are less expensive to produce.

Ordinary photovoltaic cells, meanwhile, which are the most commonly used, are much cheaper, lighter, and easier to mount where structural flexibility is needed.

The downside, though, is that their intrinsic chemical materials tend to be more environmentally hazardous and difficult to recycle at their end-of-life.

The latest solar panels can even be installed on a fabric canopy. Photo: Tor Jonhson

Perovskite revolution

The new buzz of excitement in the solar panel sector is coming from the development of perovskite solar cells, which promise 50% more efficiency than conventional photovoltaic solar cells in converting sunlight into electricity. They also have the extraordinary potential of being used in a liquid form, such as paint, and even being printed onto compatible surfaces.

Researchers are now reported to be trialling spray-on perovskite solar cells that could be applied as a tint for windows. The production of perovskite solar cells is also less energy-intensive than conventional solar cells and can be achieved at room temperature using relatively abundant and cost-effective base materials.

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Rigid Solar panels

Rigid solar panels currently on the market remain the most efficient and well-suited for mounting on larger boats with flatter surfaces. However, they are heavier, more awkward to mount, and can’t be walked on, so unless you have a hard top or dedicated gantry aft, you’re better off choosing a more resilient semi-flexible option.

Rigid solar panels are covered with impact-resistant glass in a metal frame, and often require hardware to install. Over time, the hardware and frame can corrode in unforgiving marine conditions, so it’s important to choose one with added weather protection.

Solar is well suited to use in yachts. Photo: Catchlight Visual Services / Alamy Stock Photo

Flexible Solar panels

Flexible solar panels, meanwhile, have become increasingly popular with yacht owners due to their versatility and adaptability. While not yet as efficient as rigid panels, they do offer a more eco-friendly and cost-effective option as well as being thin, light, bendable, and easy to install or mounted on almost any surface. You can, for instance, attach flexible solar panels easily to soft biminis and even sails.

However, attaching them to flexing surfaces may cause physical strain on the internal cells, causing damage in the long run. They also tend to have efficiency levels below 20% (compared to just above 20% for rigid solar panels), so they require more physical space to produce similar amounts of output.

They are usually encased in plastic coverings to make them more impact-resistant, but the plastic can degrade due to salt and UV.

Thin solar cells installed on a teak deck. Photo: Graham Snook / Yachting Monthly

Semi-flexible Solar panels

These are ideal for curved boat surfaces. The plastic covering on semi-flexible panels makes them highly resistant to impact and weight, in case you accidentally step on them while moving around a swaying boat.

Kite concept

Sailing enthusiasts working at the German engineering firm FLIN, based in Kiel, have developed a new broad range of versatile marine solar panel systems.

Products within the range include: the FLINrail, a rigid solar panel that can be used while sailing by being hooked onto a boat’s guardrails; the FLINstripe, designed to be mounted along a boom’s lazy bag using Velcro strips; and the FLINkite, a thin lightweight design comprised of up to six square panels that can be hoisted on a halyard and then tilted towards the sun using simple guide lines.

FLINkite can be hoisted vertically on a halyard and tilted towards the sun using simple guide lines

One owner who cruises a 40ft Fountaine Pajot Lavezzi catamaran in European waters has found that his FLIN installations have benefitted his cruising enormously.

‘We have four FLINflex panels mounted permanently on our built-in bimini, which produces around 450 watts while we’re sailing,’ he explains. ‘Then, when we’re at anchor or in port we can also set our FLINkite, which has six panels, each of which can produce up to around 50 watts.

We have a solar controller for each of the two systems and I’m able to monitor how well the systems are generating power using an app on my smartphone. Overall, the FLIN panels cover all of our electricity requirements, including our fridge and electric windlass. We’ve even now treated ourselves to an electric kettle!’

Foldable solar panels inspired by satellites

Origami Inspiration

Another exciting and innovative concept comes from two highly experienced sailors, Kim-Joar Myklebust and Sara Plaga, based in Milan, Italy. Together, they have designed and begun producing an origami-style marine solar panel made of recycled carbon fibre.

‘The idea came out of frustration,’ explains Kim-Joar. ‘We had regular power shortages on our sailing trips, even after we’d installed a large and bulky solar system which couldn’t keep our boat’s batteries charged.

‘As a motorsport design engineer I saw how space satellites used large solar panels that folded outwards to increase the area exposed to the sun, so I started cutting and folding a piece of paper until I found a shape I felt could work as a compact, fold-out solar panel on a boat.’

The couple’s firm, Levante, tested the effectiveness of their origami panels extensively aboard a 36ft cruising yacht, finding that their new product was 20% lighter than other foldable solar panels and 40% more compact, whilst producing only half of the CO2 footprint.

‘We’re determined to revolutionise the entire concept of marine solar panels,’ adds Sara. ‘You can use our origami solar panels in many different ways – just fold them up and use them on your boat, or at home, or anywhere you like.’

It’s vital you connect your solar panel to your battery via an electronic charge controller to prevent the battery overcharging

Solar panel maintenance

Solar panel efficiency is compromised by both salt water and long-term exposure to UV and high temperatures. Industry experts advise that good regular maintenance will improve a solar panel’s performance by around 15%.

You should clean solar panels early in the morning, while they are at their coolest, as cleaning them when they are warm or exposed to direct sunlight can cause internal thermal stresses. Always use distilled or de-ionized water to avoid the formation of mineral stains or deposits on the surface of the panels, and avoid using harsh chemicals or abrasive solvents that could scratch the photovoltaic cells.

Let the panels air dry or use soft cloths, and make sure no water residue is left. You should also check regularly for cracks, breaks or loose connections.

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Best Solar Panels For Sailboats of 2024

Sailing uses the power of the wind to move, so why not use the power of the sun to charge your batteries? Solar panels offer the best way to charge boat batteries. This method can also save the engine from being used just for charging. Getting the best solar panels for sailboats means choosing the right size and power for your boat.

But, how much power will you need? Will your panels be able to keep up even on cloudy days? Do you plan to sail in cold water or deep in the tropics? Do you need the panels to sit on a curved surface? There’s a surprising amount of factors to consider when purchasing sailboat solar panels.

Whether you’re replacing old panels or buying for the first time, let us do the hard work of comparing the best solar panels for your boat.

For more of our top sailing gear recommendations, check out the Best Wind Generators for Sailboats . 

QUICK ANSWER – THE BEST SOLAR PANELS FOR SAILBOATS 

• Nature Power Monocrystalline
• Nature Power Rigid
• Renogy Starter Kit (4 panels)
• Newpowa Poly Solar Panel
• Acopower Polycrystalline
• Nature Power 90W Rigid
• Newpowa 150W
• Suaoki SunPower
• Eco-Worthy Semi-Flexible

SAILBOAT SOLAR PANEL REVIEWS

Nature power monocrystalline.

Check out the latest price on: Amazon  | West Marine

BEST FOR: Efficient high-power use

WEIGHT: Unspecified

WATTS/AMPS: 120W/6.6A

SIZE: 45.1” x 33.6” x 3”

PROS: Foldable for easy storage and portability, pop-out legs that allow it to easily sit at an angle, sturdy design

CONS: On the upper end of the price spectrum, short warranty

NATURE POWER RIGID

BEST FOR: Energy-hungry boats

WATTS/AMPS: 165W/9.4A

SIZE: 57.8” x 26.3” x 1.4”

PROS: Powerful and efficient, scratch resistant and anti-reflective coating, well-built aluminum frame, easy-to-use connections

CONS: Powerful but expensive, only suitable for larger boats with a big flat space to set it up on

RENOGY STARTER KIT (PACK OF 4 PANELS)

Check out the latest price on: Amazon

BEST FOR: Large boats needing lots of power

WEIGHT: 18.0lbs

WATTS/AMPS: 400W/22A

SIZE: 4 x 47.0” x 21.3” x 2.0”

PROS: Includes x4 100W panels along with a charge controller and everything else needed to set up, ideal for sailors looking for a lot of power, easy mounting system, great price for a comprehensive kit

CONS: Rigid solar panels can only be on flat surfaces or mounted on rails, included charge controller might not be the charge controller for your needs

NEWPOWA POLY SOLAR PANEL

BEST FOR: Keeping small battery banks topped up

WEIGHT: 6.3lbs

WATTS/AMPS: 30W/1.7A

SIZE: 27.0” x 14.3” x 1.9”

PROS: Sturdy design, small and slim making it ideal for stern rail, wattage should be enough to trickle-charge medium battery banks, very affordable

CONS: Rigid design means placement is limited, heavy for a small panel

ACOPOWER POLYCRYSTALLINE

BEST FOR: Larger sailboat trickle-charging

WEIGHT: 6.9lbs

WATTS/AMPS: 35W/2A

SIZE: 29.9” x 16.1” x 1.7”

PROS: Looks neat with silver aluminum frame, should be able to easily keep batteries topped up and contribute to energy requirements when boat is in use, very affordable and slim, other wattages available

CONS: Weighty, aluminum frames can have sharp corners

NATURE POWER 90W RIGID

Check out the latest price on: West Marine

BEST FOR: Permanent mounting

WEIGHT: 15.2lbs

WATTS/AMPS: 90W/4.9A

SIZE: 33.7” x 26.5” x 1.0”

PROS: Sturdy frame can be mounted on gantry rails permanently, good power output and small enough to be mounted alongside an identical panel for double power, long warranty, reputable brand

CONS: Awkward to move about the deck so not ideal for portable panel, fairly heavy

NEWPOWA 150W

BEST FOR: Medium to large sailboats

WEIGHT: 24.4lbs

WATTS/AMPS: 150W/8.3A

SIZE: 58.4” x 26.6” x 1.2”

PROS: Great for permanent mounting, powerful and well-built,

CONS: Very heavy, only comes with 3ft of cable which may well be too short and require extension

SUAOKI SUNPOWER

BEST FOR: Smaller, lightweight sailboats

WEIGHT: 4.8lbs

WATTS/AMPS: 100W/5.6A

SIZE: 43.3” x 22.4” x 0.1”

PROS: 30-degree curve possible making this ideal for boat coach roofs, very thin makes for less dirt buildup and less wind resistance, good price for a powerful panel

CONS: Cable connections are on the top of the panel which may encourage corrosion and UV damage

ECO-WORTHY SEMI-FLEXIBLE

BEST FOR: Coach roofs and curved deck areas

WATTS/AMPS: 100W/5.5A

SIZE: 47.4” x 21.6” x 0.1”

PROS: Capable of a 30-degree curve making it suitable for coach roofs and curved decks, thin and durable construction

CONS: Connector on top allowing salt build-up and accidental damage

COMPARISON TABLE – THE BEST SOLAR PANELS FOR SAILBOATS 

HOW TO CHOOSE THE BEST SOLAR PANELS FOR SAILBOATS

1. required energy.

Buying solar panels for your sailboat involves more than going over a few models at random. You need to know how much power you’ll need daily. Also, you need to determine whether you will rely solely on solar power or use the engine as well.

SOLAR AND ENGINE

Will you use solar power most of or all the time? If yes, then you will need higher power, larger or more solar panels. If you plan to use the engine more, then you won’t need as much solar power.

Your sailing goals come into play in this decision. If you want to cruise the intercoastal waterways, chances are you’ll be using your engine a lot. If you plan on cruising the Caribbean, you can often rely on good winds for sailing.

Once you’ve worked out how you plan on powering your sailboat – solar and engine, or just solar – you’ll need to work out your daily amp draw . If you’ll be running a fridge, freezer, water maker, VHF and SAT NAV all day long, you’re definitely going to need a lot of power!

It can be difficult to determine how many amps your sailboat will need, especially if you still don’t have all the electronics you plan to bring on board. Some products will give you an idea of their power draw in their technical specifications. For others that don’t provide that information, you may have to settle for an estimate.

Once you have an idea of your daily amp draw, then you can work out the solar output required to keep up with that power draw. But there are other considerations too, namely, actual output vs maximum output.

ACTUAL OUTPUT VS MAXIMUM OUTPUT

While a 90W solar panel might sound like it’ll give out 90W, remember that this is its maximum output. That is, it refers to a clean panel in full sunshine. It won’t be giving anywhere near that output on cloudy days. In the case of a fixed panel, ask yourself if the sail will be casting a shadow over it on one tack.

Unless you plan on running the engine to top up the batteries on cloudy days, you will find yourself needing enough solar panel output for these times. Make sure to also consider the times when your panels aren’t giving out their optimum performance.

TEMPERATURE CHANGES

If you’re starting in Nova Scotia, your fridge won’t take much power to keep it at a cool temperature. But, what happens when you sail south to go diving in Mexico ? Suddenly, the water temperature is higher and the fridge would have to work twice as hard to stay cool. While good insulation is a bonus on a sailboat, it’s important to remember that atmospheric changes like temperature may mean an increase (or decrease) in your power requirement.

ARE WE TALKING AMPS OR WATTS?

While you need to know how many amps your sailboat will draw on a daily basis, solar panels are sold by watts. There’s no need for that to be confusing though, as we’ve also provided the amps in the chart. You can read more about watts and amps to get a better understanding.

2. HOW MANY SOLAR PANELS DO YOU NEED?

Many sailboats have more than one solar panel. This means you won’t need to move the panels to follow the sun or as the boat shifts at anchor. Having multiple solar panels also allows you to have smaller panels, which tend to get in the way less. Your required power output can be divided among them as well.

If you need 200W a day, then you could have three 90W solar panels on different parts of the boat and be covered power-wise, even on different tacks.

How much space do you have on deck? Where you place your solar panels is very boat and sailor dependent. Day-sailing in hot places? Solar panels on the bimini rack are an easy solution. Long-distance cruising? You’ll need solar panels that are efficient yet out of the way to improve windward performance.

If you spend a large amount of time on board, your energy consumption will be higher. You’ll need your solar panels to be as efficient as possible. Many cruisers have panels on top of gantries on the stern to keep them in sunshine all the time. This is terrible for sailing performance, so you have to think about where you want to compromise. Don’t forget to consider the other on-deck items, such as your paddle board , as well.

Solar panels generally come in two types: mono- and multicrystalline and amorphous thin film silicone. However, all solar panels listed in this article will be mono- or multicrystalline as they are the most effective.

MONO- AND MULTI-CRYSTALLINE

Efficient and sturdy, these panels will probably make up your core solar panel collection. For everything on board like lights, fridge, radio and navigation electrics, mono-and multicrystalline are your best bets. They aren’t forgiving on cloudy days though, and even a shadow over the corner of a panel will pull down the output by a lot.

AMORPHOUS THIN FILM SILICONE

Not as efficient as crystalline panels, amorphous panels are cheaper and flexible. They’re good for trickle-charging batteries while the boat is left unattended.

Solar panels are expensive, but their prices have been dropping over the years. If you only use your sailboat for summer weekends, chances are you won’t need pricey, hyper-efficient panels. You just need enough to keep up with your power consumption for two days a week and let the trickle-charge solar panel do the rest.

Take your solar panel budget and split it between the number of solar panels you think you’ll need. Keep in mind though that you’ll most likely need to buy a charge controller as well.

For more of our top sailing gear recommendations, check out these popular buyer's guides:

Sailboat Anchors

Sailboat Winches

Sailing Shoes

Solar Panels for Sailboats

Bilge Pumps

Updated 7 months ago

Everything you need to know about installing solar panels on boats

Written by Ana Almerini

Find out what solar panels cost in your area

Solar panels built specifically for use on boats are a great option as a source of backup power when you’re out on the water. Solar panels act as a way to recharge the boat's batteries and keep your appliances running, all without needing to buy gas for a noisy gas-powered generator.  

Marine solar panels are a relatively niche market, but there are plenty of options to choose from since typically, you can install any DIY off-grid solar panel on your boat. 

Our favorite solar panels for boats are:

Topsolar flexible solar panel

Renogy 100W 12V solar panel

SunPower 170W solar panel

Below, we get into the best solar panels to buy for your boat depending on your needs, how to determine which size you will need, and why utilizing solar power for your boat is a smart idea.

Key takeaways

Solar panels on your boat maintain your battery’s charge to ensure that your appliances always have power, without a loud and expensive gas generator.

An average 30-foot boat will need about 350 watts of solar power to maintain electricity.

To determine how many panels your boat needs, you need to figure out how much power it uses, which you can easily do with a battery monitor. It also depends on how big your boat’s battery is.

You can install solar panels in unique locations on your boat but it is important that they can track the sun’s movement throughout the day.

What is the best use for boat solar panels?

Boats use a lot of energy for things like maintaining autopilot, keeping navigation lights on, and powering radio systems. Solar panels can provide the energy to carry out these tasks and maintain your boat's battery if it happens to be sitting idle. In either circumstance, your battery will never run out of energy. 

Not to mention, compared to gas-powered generators, solar panels have the added benefit of being quiet. They also don’t produce excess heat that makes sitting in your boat with a gas generator unpleasant on hot days.

You can use solar panels for any size boat. For smaller sailboats, the main job of your solar panels would be to keep the battery fully charged for your boat’s electricity. For larger boats, they help reduce or eliminate the need to use the engine to provide excess power. 

The average 30-foot boat would require about 300-350 watts of power . Depending on your energy use and boat size, you need more or less solar power to provide you with electricity.  

How to choose the right solar panels for your boat

The first step to determining what size solar panel will work for your boat is figuring out how much power your boat is using . You can do this by checking the labels on your appliances for the typical amp hours and volts used.

Or, you can use a battery monitor to measure the amount of energy your fridge, lights, or the other appliances on your boat consume while in use. After finding the amp hours your boat uses per day, you can determine the wattage of power your solar panels need to produce. 

This example is extremely limited, you will need to determine how much energy your entire boat is using to make sure your panels provide enough power to keep your battery charged. But, technically if you had one 300-watt solar panel, or (3) 100W solar panels, they would generate 2,800W over those 8 hours. That energy would be more than enough to keep the above appliances running. 

The size of your boat’s battery will also factor into which size solar panel you need . For instance, many DIY solar panels are meant to act as a battery charger to a 12-volt lithium battery, which is the typical size within a boat. But if you have a larger boat with a larger battery, you might need more than 350 watts of power. 

Additional things to consider are whether you will need a charge controller and if you have enough unshaded space for your solar panels to absorb the maximum amount of sunlight. 

Do you need a charge controller? 

A charge controller acts as a regulator for the amount of energy that is transferred from your solar panel into your boat’s battery. This helps to make sure that your battery is not overloaded and overcharged, which can ruin the battery over time. 

While it is not necessary, it is a good idea to install a charge controller with your solar panel system to help manage the energy load that your battery receives. This will prolong the life of your battery while ensuring your boat uses the exact amount of energy it needs. 

Do you have enough space for boat solar panels?

Having a dedicated spot on your boat that has access to the full sun is key. Any shading, such as from a sail on your boat, will reduce the amount of energy your panels produce. While simply bringing portable solar panels aboard is an option, permanently mounting the panels to your boat makes it easier to always have your panels ready to go. 

Because boats typically only have room for a small solar system, getting the most out of your limited space is key. With limited space, it’s best to look for high efficiency panels because you will need less of them to produce the energy you need.

Learn more : What are the most efficient solar panels in 2022?

Or something as simple as the setup below can power your boat's battery and be angled towards direct sunlight throughout the day while not taking up valuable space on the boat.  

What are the best solar panels for boats to buy?

Any type of panel can be used on a boat such as monocrystalline, polycrystalline or thin-film. However, it is important to note that some companies exclude salt water and marine environments from their warranties. 

We've listed some options below, you can choose based on where you have space to put the panels. For instance, thin-film panels are less efficient but they are flexible. So if you wanted to place a few panels on your boat’s roof versus one panel taking up valuable space, thin-film panels would be a good choice. 

On the other hand, monocrystalline and polycrystalline panels have higher efficiency ratings and will ensure you get the most energy from your limited space or during low-light conditions. So if you have a location that can support racking, monocrystalline or polycrystalline solar panels are a better option. 

Below are some of our top picks for solar panels for boats:

Most practical 

Topsolar flexible solar panel 

Cost : $149.99 Buy Now

The Topsolar 100W flexible solar panel is a practical, semi-flexible, cheap option. It does not come with a charge controller or an inverter but you can buy a few of these to create a simple solar panel system on your boat.  

This flexible panel also allows you to utilize more space since this can be molded to fit untraditional angels on your boat. 

Best quality, small cost 

Renogy 100W 12V solar panel 

Cost : $103.44 Buy Now

The Renogy 100W 12V solar panel is a great option. At 21%, it is a high efficiency monocrystalline panel manufactured by a reputable solar panel company.

There are pre-drilled holes for easy drilling to a mount on your boat. If you have space to secure solar panels to a mount, the Renogy panels will help you maximize energy output.

Best overall 

Cost : $399.00 Buy Now

The SunPower 170W panel is a great flexible solar panel for off-grid use. Choose this option if you are interested in the versatility that a flexible solar panel offers and also want a reputable brand name with a high efficiency rating. 

While these panels do not come with a solar charge controller, they must be used with one, so add one to your cart like the Victron Energy SmartSolar MPPT charge controller . 

Why solar panels are a good choice for backup power on boats

Having a source of backup power on a boat is very important, you do not want to be caught far from land with a dead battery. Solar energy is the perfect choice because on a typical boating day, there is ample sunlight available as renewable energy. Because boats rely on a battery for electricity, a solar panel can ensure that this battery always has power. 

There are many solar panel options available for your boat and can easily be installed DIY. They will help with your sense of security while saving money because you can skip out on the traditional gas generator and rely on a self-sufficient solar power system. 

Ana is the Marketing & Communications Manager at SolarReviews, working within the solar industry since 2020. With a Master's in Climate and Society and professional experience in marketing, she helps communicate the value of solar to homeowners and build awareness of the SolarReviews brand. On weekends you can find her at the Jersey shore, reading a book from the ever-increasing stack on her side table, or eating food someone else cooked....

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• Inside Practical Sailor

Estimating Solar Panel Size for Boats

The starting point for a successful solar panel installation is quantifying your requirements. We present here a simple analysis based on the test boat used for our recent report on choosing and installing a solar panel. Some values are from experience, and others are accepted rules of thumb. For more details on choosing and installing a solar panel, see the March 2018 issue of Practical Sailor online.

Energy Balance

Look up the current draw of each piece of equipment (confirm with panel ammeter if available) and estimate the number of hours operated. Record the number and capacity of your batteries, recognizing that you cannot draw below 50% charge without shortening their life, and that you will seldom charge past 85% while away from the dock-as a result, only 35% of nameplate capacity is really useable. Finally, total your charging sources, including engine, wind, and solar. For solar, take the rated wattage x 5 hours/12 = amp-hours while on passage and wattage x 7 hours/12 = amp-hours while at anchor (sails do not shade and the boom can be rigged out to the side). This is far below the rated capacity-sailors in the tropics will do better, and sailors farther north or sailing in the winter more poorly-but this is an accepted starting point.

Estimating Panel Output

How many days can you manage with poor generation? Are you willing to economize during a long cloudy stretch? Will you recharge at a marina or by running the engine periodically? Long-term cruisers appreciate an abundance of power, while the occasional cruisers may be satisfied with less.

Saving Power

Every AH (amp-hour) consumed has a real cost in weight, panels, and dollars. If you can reduce consumption by 50 AH/day you will save a battery (the useable capacity), a 120 watt panel, and perhaps a mounting arch. The cost savings might be $500 and 150 pounds for just a few bulbs.

• Lighting. Switch from incandescent to LED and fluorescent lighting, starting with the lights you use most. We use LEDs and fluorescent for the anchor, salon, and cockpit lights, but since we seldom run at night, we left the running and steaming lights alone. Likewise, the deck light and many task lights remain halogen or incandescent; they are not used enough to matter.
• Go to bed at night and get up with the sun. Big savings in juice and more time to play.
• The gas solenoid is a big user for us; it runs the propane fridge and cabin heater, so it is on for long hours, but we can turn it off at night or go without refrigeration now and then.
• Fans. Run them on low speed and watch the hours. A wind scoop doesn’t use power.
• Instruments. Do you actually need GPS and other instruments full-time on passage? Twenty years ago they didn’t even exist. Balance the sails to minimize the load on the autopilot.

If you’re not sure if it’s time to upgrade or replace your solar panels, the upcoming June 2023 issue offers detailed guidance on evaluating old solar panels and house batteries. If you are upgrading your boat’s electrical system, adding new accessories, or just replacing some wires, our recently updated six-volume ebook Marine Electrical Systems covers everything you need to know about electrical systems–including Batteries, System Installation (including rewiring and lightning protection), Panels, Monitors, Charging, Alternative Energy, and AC Systems.

Power Usage Table

Drew Frye is a frequent contributor to Practical Sailor. He blogs at www.saildelmarva.blogspot.com

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On watch: this 60-year-old hinckley pilot 35 is also a working girl.

Good subject; article can not be understood by most people.

What people need to know is: I have a x feet sailboat; my boat sits idle y days/week, I live in z area; how many watts will I need most of the time?

What people need to know is; do I have enough places to put the panels, are there panels designed to work well vertically, are flexible panels practical?, etc.

There really isn’t any way to get a realistic daily usage estimate without an amp-hour meter. Do you actually know how many hours per day the fridge compressor runs? They cost a couple hundred and take a couple hours to install.

On my boat, it’s the fridge that is the energy hog. Long ago, I replaced almost all lights (cabin, navigation, and anchor) with LEDs. Cut energy use significantly and worth the money. Newer electronics also have lower draw than very old units. Radars now work at a tenth the prior draw.

Can any readers comment on solar panel output for various mount locations? Bimini, dodger, rotating on stanchions, cabin top What’s best? What’s acceptable?

BTW Boats with a head and galley qualify as second homes and thus are eligible for federal credits for solar panels and batteries bigger than 250 amp-hours. 30% off

After communicating with someone cruising in the Pacific I followed his advice…”Put up as much solar you have room for and you can afford.” With that advice I installed 4x140W (560W) Kyocera panels; 2x140W over the dodger and 2x140W on a new stern arch on my Tayana Vancouver 42. The panels are permanently fixed and I never worry about adjusting them for the best angle. On my roundtrip to Hawaii I never had to start the diesel engine to charge the batteries and I don’t have a genset. I did use the Pacific Cup 2012 Sample Energy Budget as a template and modified it for determining my energy use and highly recommend it. I strongly second the comments about being reasonable in your use of electrical power as it is the easiest and most cost-effective way to manage that requirement…take a very hard look at everything that uses electrical power; do you really need it or use it as much as you do?

I don’t understand the reference to just LA/Flood batteries…

I havev all LiFePo4 both main bank and 12v house and never have any power issues…

I simply maxed out as much as physically possible on my narrow beam 40ft sloop both PV and storage…

A couple items i dont understand. The ‘charging chart’ above has engine charging at 2 amps. This seems very low. Most alternators output in excess of 50 amps. Plus the chart has 2 amps for 5 hrs with a total AH of blank. Also dont understand the ‘solar charging row’. The number just dont jive.

The 2 amps is easy; the example boat had two 9.9 hp outboards that charge 1 amp each. Yes, 2 Amps x 5 hours should have been 10 Ah. Of course, many days the engine does not run.

The refrigeration on the boat in the example was propane, thus no usage.

Additionally, it should be obvious that not all of the items will happen every day. Passage making and at-anchor are different.

Every boat is different. The idea is that by estimating usage, generation, and inventory (batteries) you can better understand your system.

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Solar Learning Center > Solar Panels for Home > Solar Panel Installation Process > Solar Panels For Boats and Yachts Solar Learning Center > Solar Panels for Home > Solar Panel Installation Process > Solar Panels For Boats and Yachts -->

Solar Panels For Boats and Yachts

By Michael Olenick | Jul 26, 2022

The purchase of a boat or a yacht is a coveted purchase for many people. While it certainly adds a new dynamic to one’s life, it’s not the most straightforward investment since maintenance is a huge component of owning a sea vessel. Other than the physical maintenance of your boat, fuel management and maintenance is often a logistical nightmare for many boat owners. Some of these problems include keeping batteries topped off; doing it quietly, as not to bother the surrounding communities; and refueling costs. An easy solution to these problems: solar panels.

Sizing a Solar System for Your Boat or Yacht

• Refrigerator(s)
• Radar & sonar units

When adding up your energy consumption, always round up and add about 10-15% extra Watt-hours to your total, as certain appliances tend to use up more energy during spring and summer months. Once you reach the conclusion that you are ready for a further discussion, you can always reach out to a solar panel expert to get solar quotes, help with your energy calculations, and aid in determining the right number of panels you would need to offset your yacht or boat’s energy usage. Obviously, the number of panels you would need depends on energy usage and vessel size, but solar is a much better option than common fossil fuels when powering your boat.

The Benefits of Adding Solar Panels To a Boat or Yacht

When it comes to adding solar panels to your boat, the benefits are endless. Here are just a few for you to consider:

• Silence: Noisy refueling at docks and extremely loud on-board generators are a thing of the past. Cruise the seas in with zero mechanical noises, and enjoy the natural ocean sounds.
• Minimal Maintenance: The only maintenance solar panels require is a simple rinse off every couple of months, as salt can build up when the seawater evaporates.

• Travel Lightly: With your new panels, you won’t have to lug heavy containers of fuel with you on your trips. More room for wine or martini mix.
• Unlimited Energy: Aside from the occasional cloud in the sky, you will have full access to the sun on the open seas.

Besides the affordability and convenience, solar panels could inevitably save your life. You will never have to worry about running out of fuel when you are out on the water. This will help you avoid any potential emergencies or disasters.

Solar Panel Placement

This is where most caution needs to be taken. When choosing where you are going to place your solar panels on your yacht or boat, you need to take two big things into consideration: shading and security.

When it comes to shading, you want to make sure you place your panels in an area that receives the most sunlight. Having your boom shade some of the panels, or any lines can reduce your energy production. The wiring of solar panels can also be delicate. That is why you need to place your solar system in the most secure spot possible – rough seas or choppy waters could lead to a wire shaking loose.

If you’re longing to make a maintenance upgrade to your nautical vessel, a solar system should be seriously considered. Not only will it reduce noise, weight, and fueling costs, but it will differentiate your boat from all the other vessels at your next port.

Whether you have questions about panel placement, efficiency, or just if your boat is right for solar, please click here to speak to an expert!

Solar Panel Installation Process

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Let us help you go solar aboard, start enjoying c lean, quiet & renewable po wer.

At Sun Powered Yachts we hope to inspire and inform yacht owners on the benefits of going solar with SunPower & Maxeon. We're here to answer any questions you may have. 

With a background in sailing & solar, and also from living off-grid for 11 years in Hawaii, we have the knowledge to help you with your solar install.  Find out more about us  

In 2021-2022 we spent 15 months as a family living aboard our sailboat, a Dufour 382 sailing from Corsica to Cancun and more recently to Florida & Bahamas.   An intrepid adventure of over 7,000NM visiting 12 countries along the way.  We're available for solar consultations with SunPower & Maxeon panels in stock in the USA ready to fulfill orders. 

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Choose your maxeon ® solar panel bundle, fixed frame panel bundles.

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Visit our shop for flexible & fixed frame bundles*, *at sun powered yachts we only sell premium cosmetic quality sunpower® e-flex panels.  our inventory is warehoused in arizona, please visit our shipping policy  for full details  , 1% for the ocean, we are committed that 1% of your order with us goes directly to support the papahānaumokuākea marine debris proj ect ( pmdp ) in hawaii.  the 2024 clean up season began in april with a 19-day mission to midway atoll removin g  an incredible 70,080 lbs of marin e debris  .

Federal Tax Credits

Have you heard about the Federal Tax Credits that you could take advantage of for going solar on your boat?  Yes, your boat! 

Do you have a head, galley & bunk aboard? Then you may qualify and t he Federal Tax Credit has now gone back up to 30% of the total cost to put your solar system in place.

This can include solar panels, controllers, wiring, labor etc. and can now more easily include batteries - maybe time for that lithium upgrade to Battle Born

SunPower Advantage s

Silent power

Solar panel systems burn zero fuel and have no moving parts. They are clean and silent, producing no atmospheric emissions or greenhouse gases that are harmful to the earth.  Enjoy those quiet anchorages with no more noisy engine/generator running just to charge your batteries.

Easy install

The simple and easy installation of SunPower® E-Flex panels on your bimini, dodger, or deck, will reduce costs of adding an expensive davit or custom racking and mounting solution for traditional large & heavy fixed  frame solar panels.

Highest quality

Incredibly reliable and easy to maintain. With no moving parts, visual checks and servicing easily keep systems operating. Solar panels are robust & durable with a junction box designed with a high level of protection from dust & water ingress.

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Maxeon to open new factory in USA

Great news! Maxeon recently announced (Aug 10th) that they will be opening a 3 Gigawatt factory in New Mexico. Construction will begin Spring 2024 and so by 2025 that's high efficiency Maxeon solar panels being made right here in the USA! 

Read our news post for full details.

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Are you looking for a boat already set up to go cruising?  We have our 2016 Dufour 382 GL 'Blake' listed for sale on Yacht World .  She is the adventure version with taller mast/deeper keel, 950W of SunPower flexible solar panels, a DC watermaker, new dinghy and plenty of safety gear.  Currently in Freeport, Bahamas.  For more details contact us directly

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Check out our Install List  

We have added an Install List page to our website which currently has over 130 installs from our customers.  Get inspired by what other boat owners have added for SunPower & Maxeon solar panels. 

Maybe you own a Lagoon 400 or a Morgan 41 and wonder what panels might fit aboard, check out the list to see how other owners have gone solar aboard.

Calico Skies 3x 410W

Bill & Grace sail Calico Skies , a Sabre 36, and whilst in Mexico they installed 3x410W SunPower fixed frame solar panels as part of a major upgrade to their arch/davit system.  

Check out their YouTube episodes including  #177 to see how they get on adding 1,230W (or 1.23kW) of SunPower solar panels.

Calico skies install details

"We made 7.2kWh yesterday out of our panels, what an upgrade!" 

Bill & Grace

SV Delos 3x 410W + flex

Brian & Karin of SV Delos   installed 3x410W SunPower fixed frame panels when on the hard in Mexico ( YouTube Ep.407 ) 

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SV Delos install details

"Love our new 410W panels and they're the same size as the old 300W ones - woohoo!"

Brian & Karin

Sailing La Vagabonde 2x 470W + flex

Riley & Elayna of Sailing La Vagabonde have been working on their new Rapido 60' trimaran and added 2x470W Maxeon fixed frame panels. 

They also have 6x170W SunPower flex panels they can deploy when needed.  With a 48V battery bank these panels are wired in series  YouTube episode

SLV install details

"Thank you, the solar panels have been absolutely incredible."  

Riley & Elayna

Testimonials

"So now I generally

Don't bother hooking, up to shore power".

     Thanks for all the help in planning my solar project for my boat. The two 170W flexible panels fit well on my Bimini and now I generally don't bother hooking up to shore power.  Although I haven’t had any long trips since my installation I have done a few day trips. And even with fridge, radio, plotters, autopilot and occasional radar it seems that these panels are keeping up with my usage. The advice and service has been great.   Thanks again.

Jeanneau Sun Odyssey 469

"It is by far the best decision I made "

         I bought a solar system from Sun Powered Yachts in 2020. It is by far the best decision I have made for the electrical system on my boat. I would (and do) recommend Sun Powered Yachts to anyone looking to add solar to their boat.

Endeavour 33

"Terrific customer service, always responsive"

         The process of researching a solar solution for my Beneteau 41 was simplified & clearly understood once I discovered Sun Powered Yachts.  Terrific customer service, patient, always responsive with guidance and products that just work. Being a novice at setting up a solar system, I had many questions along the way, and the team at Sun Powered Yachts were always there to answers my questions and provide support.

Beneteau 41

Become a more sustainable sailor with SunPower® &  Maxeon® solar panels

Sunpower® solar videos, jodi endicott environmental art june 2024.

Our Beautiful Boat Home (FULL BOAT TOUR)

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Image: Solbian Solar

Baltic Yachts began delivery in July of its Baltic 146 Path, which includes an 8,714 watt solar rooftop and energy storage system designed by Solbian Solar using the company’s walkable solar modules.

Recently, some of the yacht’s technical work has been shared online. Built from 1,742 monocrystalline solar cells, many of the 86 solar panels were custom cut to fit the deck’s shape by the Solibian team in Italy. The units were based on the company’s Super Rugged (SR) Series .

The SR series has solar cell busbar technology developed by Merlin Solar. In one video, the Merlin team drives over the solar panel, throws bags of cement on it, and even shoots it with a bow and arrow in an effort to prove the product’s resilience. The company said its busbar technology makes this kind of abuse possible.

The 60 square meters of solar panels produces 30-50 kWh of energy per day. The company said that’s enough to power all of the onboard electronic equipment–including navigation, autopilot, lighting, and entertainment–for around seven hours.

Once the sun goes down, a Mastervolt MLI 44kWh LiFePO4 battery pack allows the diesel generator mostly to stay off, providing generally silent operation for 14-18 hours.

Baltic Yacht’s solar system is roughly half the size of the Silent 60’s 16.8 kWdc solar plus storage system. The Silent 60 is a solar-propelled yacht less than half the lengthBaltic yacht and price, which reaches 6-8 knots on solar power alone. The Path does not feature electric propulsion and therefore relies on diesel engines when the wind dies down.

Since the Path uses a sail for propulsion, the team installed 154 bypass diodes and 12 solar panel strings and trackers – Mastervolt SCM-60 MPPTS – in an effort to maximize power output and minimize the effect of the sail’s shadows on the panels. The entire solar system, including wiring, controllers and small parts, weighs less than 300kg, the company said

The 146 Path has an overall length of 146 feet. The yacht can accommodate eight in addition to the ship’s owner, as well as eight crew members. Path carries two tenders, an 8hp Torqeedo electric outboard-powered RIB, and a 6.5m twin-engined RibEye. There are also two ultra-lightweight Reverso Match sailing dinghies.

When the front tender is deployed, its storage container can be turned into a pool.

The ship’s main diesel engine is a 405kW (550hp), six-cylinder Scania. The specific model isn’t listed, however the “ DI13 092M IMO Tier III, EU Stage IIIA ” lines up with all of the stats and looks like the unit in a video of the engine being installed.

The owner’s suite includes a sleeping cabin, and an en suite lounge with a glass divider doubling as a movie, tv, and sailing information screen. An upper lounge features a 2.7m-long video wall.

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Since it is E propulsion all they have to do to change while sailing is use the motor in regen it’ll generate power back into the pack at much larger amounts. And a small RE fueled generator just in case. As a sailor who does solar, not a chance it’ll get that much from the solar from all the shading from the rigging. More likely 10-30kwh/day. On mine, I made the sails small with 2 masts so I can lower them to not shade the panels.

Any photos of your boat you can share?

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6 Best Solar Panels for Sailboats in 2023

Categories Boating

Solar panels are a great way to power your boat and enjoy off-grid benefits. You can use them for charging batteries, running lights, or even providing you with hot water. The best solar panels for sailboats are those that can withstand the harsh marine environment and provide you with clean, quiet energy.

Six best solar panels for sailboats

Here are our top six picks for the best solar panels for sailboats:

Renogy Flexible Solar Panel 175 Watt 12 Volt

This Renogy solar panel is one of the best options for a sailboat. This product has an efficiency rate of 16-18% and will produce an average of 175 watts.

The Renogy flexible solar panel is a durable and lightweight product that can easily mount on any surface.

The best feature of this product is the 10-year warranty that Renogy provides. This solar panel can be used in any weather condition and will not become damaged or broken easily.

The best part about this product is the price. It is one of the most affordable solar panels that you can purchase. This product is perfect for any boat or RV and will provide a reliable energy source.

No products found.

HQST 100 Watt 12V Solar Panel

The HQST 100-watt solar panel is one of the best solar panels for sailboats. The HQST 100-watt solar panel can charge multiple batteries and other devices.

The HQST 100-watt solar panel is highly efficient as it can charge multiple batteries and other devices.

The HQST 100-watt solar panel is eco-friendly and durable. The HQST 100-watt solar panel is a one-time investment that will save you money in the long run.

The HQST 100-watt solar panel is water resistant, shockproof, and has an anti-corrosion coating.

Topsolar Flexible Solar Panel 100W 24V/12V

The Topsolar Flexible Solar Panel 100W 24V/12V is an excellent option for sailboats. It is a practical, semi-flexible, cheap option. The connectors are incredibly robust and withstand lots of wear and tear over time.

The maximum energy absorption is crucial if you want to increase the performance of your solar panel.

The Topsolar Flexible Solar Panel can be mounted on pretty much any vessel, either flat on the surface of your deck or curved around the mast. This is an excellent feature as it allows you to take advantage of the sun’s energy no matter what shape your boat is.

You can use the Topsolar Flexible Solar Panel with the Topsolar Tripod for mounting your boat’s mast.

This is a great option to consider if you want something that will improve your sailboat’s performance without breaking the bank.

SunPower Flexible 110W Solar Panel

The SunPower Flexible Solar Panel is made with high-quality materials, ensuring durability. The solar panel can be easily portable and flexible. The solar panel has a five-year warranty on power and a two-year warranty on the product.

The solar panel is lightweight and has a durable build. The output quality of the solar panel may deteriorate over time, but you can use the extended warranty to address this issue.

The solar panel is also weatherproof, so the elements will not damage it. The only disadvantage of this solar panel is the price.

Newpowa 30W Watts 12V Solar Panel

The Newpowa 30W Watts 12V Mono Solar Panel is one of the best solar panels for sailboats. The Newpowa 30W Watts 12V Mono Solar Panel is a high-efficiency solar panel perfect for sailboats.

It is a monocrystalline solar panel that offers a 25-year transferrable warranty against a drop in power output.

The Newpowa 30W Watts 12V Mono Solar Panel is a 100% waterproof solar panel that can protect things when the doors and the soft or hardtop roofs are removed.

The Newpowa 30W Watts 12V Mono Solar Panel is a durable solar panel that can withstand weather conditions and sunlight exposure.

ECO-WORTHY 100 Watt Solar Panel

The ECO-WORTHY 100 Watt Solar Panel is one of the best solar panels for sailboats. This panel type comes with a warranty and IP65 water and dustproof rating.

This solar panel is lightweight (only 13 pounds) and has all the accessories needed to install it on your boat. The panel is easy to install and waterproof, so you don’t have to worry about any damage from the rain or water splashes.

The ECO-WORTHY solar panel is designed to work well with different types of boats. It has everything you need to install on your boat, including a mounting bracket and an MC4 connector cable.

How to choose the right solar panels for your boat

To choose the right solar panels for your boat, you must determine how much power your boat uses. The first step is to determine how many amp hours your appliances use daily.

You can use a battery monitor to measure the energy your fridge, lights, or the other appliances on your boat consume while in use.

After finding the amp hours your boat uses per day, you can determine the wattage of power your solar panels need to produce. For example, if you have a 50-watt panel and use 30 amp hours per day, you would need two 50-watt panels to produce enough power for your needs.

Additional things to consider are whether you need a charge controller and if you have enough unshaded space for your solar panels to absorb the maximum amount of sunlight.

What are Flexible and Rigid Solar Panels?

Rigid solar panels are more efficient but less robust than flexible panels. Monocrystalline cells offer a better output than polycrystalline cells. The output voltage depends on the number of cells on the panel.

Module efficiency is now more often around the 20% mark, as opposed to 12-15% for older models and semi-flexible (up to 20° bend) is usually better than flexible (up to 180° bend).

If the maker offers a 25-year guarantee instead of a 3-5 year one, you can be pretty confident they’re good. Regarding charge controllers, it’s worth paying a little more for a decent MPPT.

How many solar panels do I need for my sailboat?

You will need between 2-8 solar panels for your sailboat. The amount you need depends on the size of your sailboat and how many electronics you need to power. 2-4 panels should be enough if you have a small sailboat. For larger boats with more electronics, 4-8 panels are recommended.

What are the benefits of solar panels for sailboats?

Solar panels are a great alternative to running a gasoline generator or taking power from the grid. Solar panels are eco-friendly and can be a lifesaver if you are at sea for a long time. Solar panels can provide comfort amenities such as access to a tv, microwave oven, etc.

Solar panels are an excellent option for sailboats because they are eco-friendly and have many benefits that make sailing more enjoyable. The best solar panels for sailboats are durable, easy to install, and produce a lot of power.

What are the disadvantages of solar panels for sailboats?

Solar panels for sailboats rely on the sun on to generate electricity. Sailboats are limited in space and cannot carry large solar panels. Solar panels can be expensive to install on a sailboat. Solar panels for sailboats are less efficient on cloudy days.

How much do solar panels for sailboats cost?

Solar panels for sailboats cost a few hundred dollars each. Permanent solar panels can cost one or two thousand dollars in some cases. Portable solar panels can cost just a few hundred dollars each.

If you are installing permanent solar panels because you plan to be making long voyages, it is ideal to have two or perhaps even three large batteries hooked up to your boat.

Do I need a professional to install solar panels for sailboats?

You do not need a professional to install solar panels for sailboats. Solar panels can be installed on sailboats by anyone that is reasonably handy. You can also install solar panels yourself if you are handy.

If you do not feel comfortable installing solar panels yourself, you can hire a professional to install the system for you. An excellent marine electrician will be able to help with your solar panel installation.

Are Solar Panels Safe On Sailboat Boats?

Solar panels are generally safe to use on boats. The panels themselves have a minimal risk of starting fires. However, if they are damaged, they may become unsafe.

Solar panels are covered by glass that keeps them safe from sharp shards of glass. However, if the panel gets wet, it can become deadly due to the combination of electricity and water.

	--> | | | Download | Universal Arch Design Makes Installations on Hundreds of Other Makes and Models Possible Cruising Sailors want More! More Power, Bigger Tenders, More stuff! Our new Sch 80 Mark2 Sail Arch meets those needs, with a Larger extended truss to provide increased resistance to lateral motion and the ability to easily handle a grid system with up to four large solar panels for morethan 1600 watts of solar. Plus all of our accessories, Tender Handler, Kayak/Paddleboard racks, Starlink antennas, Motor Cranes and more , distance between forward legs and after legs is the same See diagram 1 , 2 . Super Sail Arch Xtra High Capacity , 2"ID super sized material InLine Mounting Centers Inches   Forward Legs   After Legs        Minimum   Maximum   Minimum   Maximum  TIB101/02  Sail Arch Standard Schedule 40     TIB24350 78 90 78 90  $   2,800.00 TIB24400 88 100 88 100  $   2,800.00 TIB24500 92 112 92 112  $   2,900.00 TIB24600 104 123 104 123  $   3,000.00               TIB101/02SPO1  Sail Arch HiCapacity Schedule 80     TIB24350 78 90 78 90  $   3,500.00 TIB24400 88 100 88 100  $   3,500.00 TIB24500 92 112 92 112  $   3,600.00 TIB24600 104 123 104 123  $   3,700.00               Mark 2 Sail Arch HiCapacity Schedule 80     TIB24350 78 90 78 90  $   4,100.00 TIB24400 88 100 88 100  $   4,100.00 TIB24500 92 112 92 112  $   4,200.00 TIB24600 104 123 104 123  $   4,300.00 TIB24650 104 123 104 123  $   4,500.00               Sail Arch HiCapacity Schedule 80 Extra Wide TIB24400 118 130 118 130  $   4,000.00 TIB24500 128 140 128 140  $   4,100.00 TIB24600 138 150 138 150  $   4,200.00 TIB24650 148 160 148 160  $   4,400.00                             TIB101/02SPOMK2 Mar 2 Sail Arch HiCapacity Schedule 80 Extra Wide TIB24400 118 130 118 130  $   4,500.00 TIB24500 128 140 128 140  $   4,600.00 TIB24600 138 150 138 150  $   4,700.00 TIB24650 148 160 148 160  $   4,900.00 Offset  Mounting Centers Inches Forward Legs   After Legs        Minimum   Maximum   Minimum   Maximum  TIB1015/025 Sail Arch Standard Schedule 40 Legs Offset         TIB24350 78 90 68 80  $   2,900.00 TIB24400 88 100 78 90  $   2,900.00 TIB24500 92 112 82 102  $   3,000.00 TIB24600 104 123 94 113  $   3,100.00             TIB1015/025SPO1 Sail Arch HiCapacity Schedule 80 Legs Offset   TIB24350 78 90 68 80  $   3,600.00 TIB24400 88 100 78 90  $   3,600.00 TIB24500 92 112 82 102  $   3,700.00 TIB24600 104 123 94 113  $   3,800.00             Mark 2 Sail Arch HiCapacity Schedule 80 Legs Offset   TIB24350 78 90 68 80  $   4,100.00 TIB24400 88 100 78 90  $   4,200.00 TIB24500 92 112 82 102  $   4,300.00 TIB24600 104 123 94 113  $   4,400.00             Sail Arch HiCapacity Schedule 80 Xtra Wide Legs Offset TIB24400 118 130 108 120  $   4,000.00 TIB24500 128 140 118 130  $   4,100.00 TIB24600 138 150 128 140  $   4,200.00 TIB24650 148 160 118 150  $   4,400.00 Mark 2 Sail Arch HiCapacity Schedule 80 Xtra Wide Legs Offset TIB24400 118 130 108 120  $   4,700.00 TIB24500 128 140 118 130  $   4,800.00 TIB24600 138 150 128 140  $   4,900.00 TIB24650 148 160 118 150  $   5,000.00 Please Call for information on specific yacht applications; certain customizable dimensions are possible at additional cost Prices and specifications are subject to change, please call for current information [UPDATED] Click to see a comprehensive list of boats our "Tower In A Box" Sail Arches have been installed on. Universal Arch Makes Installations on Hundreds of Other Makes and Models Possible High Strength welded frame of schedule 40 marine grade aluminum pipe nearly 2" in diameter, with secondary reinforcement of nearly 1 3/8" in diameter finished in durable salt resistant bright clear anodizing The Arch has the appearance and strength of a custom welded unit when installed on your boat. It weighs less than 100 pounds, and is strong enough to support the weight of two persons for the installation of equipment. , or 2" diameter 2 bolt bases click here (new page, Kit #6 detail) Cupped feet, to allow direct pass thru of electrical cables are available at additional cost. Everything is included for a complete installation on most boats, even backing plates along with instructions and a video detailing all the steps of the installation. New for Spring 2015, "Tower In A Box" arch bridges include a snap-in Sintra cover panel in radar plate to conceal wiring. A feature borrowed from our Custom Structures. 6391 Walmore Road Niagara Falls, NY 14304 Tel: 1-866-945-8801 Email: --> Available Options: --> Atlantic Towers manufactures a wide variety of fittings and specialty hardware that allow Sail Arch owners to design and build a variety of individualized applications. Including Solar Panel array supports. Davit arms, lifting eyes, outboard motor brackets, etc. A growing number of cruising yachts are using Tower in a Box® stern mounted arches to mount solar panel arrays and lift their tender. Frequently arches cannot be mounted sufficiently far aft to provide a straight “pick” when lifting the tender and the tendered needs to dragged up and over the sugar scoop or extended platform to raise it into a secure position under the arch. The “Tender Handler” option provides “reach” to lift the tender from the water behind a sugar scoop transom or extended swim platform and then bring it high and close to the yacht under the arch, where it can be secured for navigation. The unique design feature is the articulated pivot at the connection of the “Tender Handler” frame to the arch, eliminating the need for perfect alignment and ensuring smooth operation. Wind Generator Base and Mast can be clamped anywhere on the top of your arch. Comes with a 40' length of 1 1/2" Schd.40 which can be permanently fitted into the receiver with two part epoxy, or made removable with the use of machine screws or quick release pins. The 1.90" outer diameter of the 1 1/2" schd.40 pipe fits many popular wind generators. the Wind Generator mast MUST be ordered with the arch, it cannot be bolted on. --> An extruded anodized aluminum clamp assembly that can be used to secure a lifting tackle to the arch. Can be mounted to top of arch to extend the "pick point" of the lifting eyes up to 24" behind arch. Includes two 42" Schd.80 extensions, end caps, curved washers, clamp assembly lifting eyes, and all hardware needed for installation. . Allows you to mount solar panels anywhere on your arch. Kit contains (2) 65" lengths of 1" x 2" x 1/8" rectangular aluminum tube, (4) plastic end caps, (8) Curved Washers, and all hardware needed for installation. We offer a full line of parts and accessories that can be combined to create your own custom mounting solution. For pricing and more information please call Need more rod holders? Individual can be mounted anywhere on the perimeter of the Sail Arch framework. A unique patented design available exclusively from Atlantic Towers, manufactured from all aluminum in natural aluminum or gold anodized finish Adjust-O-Launchers can be pivoted thru 12 positions for unmatched flexibility. Fits all marine standard 1-1/2” pipe (1.90” o.d.) AJ30500C Clear Anodizing: AJ30500G Gold Anodizing: More light, less current draw than conventional halogen lamps. Current draw less than 1 amp each (less than 2 amps a pair) at 12 volts. Wire with minimum 20 gauge (always used tinned stranded wire for marine applications). Includes Choice of mounting bracket to fit any Atlantic Towers structure. Tower in a Box Arches - Single MP152 with KIT54000 Light Mount: Custom Arches - Single MP152 with KIT54000 Light Mount: An extruded anodized aluminum clamp allows you to add a cleat anywhere on your Atlantic Towers Sail Arch. Made from 1 1/2" schd. 40 anodized aluminum pipe with an outer diameter measuring 1.9" and features eye bolts for tying down equipment along with grip rail to prevent any slipping or damage. With three different clamp on or bolt on versions available, the rack can be clamped or bolted to existing arches, hardtops, davit systems, bow rails, and foredecks. Bolt on Rack: Clamp on Rack: The Arch was designed for owner installation and is typically no more complicated than installing rod holders or outriggers, just a few more pieces. If you are comfortable with hand tools, the Arch comes with instructions and all the backing plates and hardware required for a thru bolted installation. page for professional installers with whom our customers have had a good experience) How is the Arch shipped to me? Although the Arch is not heavy it is too large to go by UPS. We have discounted freight arrangements with several trucking companies, which cover all 48 states and Canada. We can also ship to Alaska, Hawaii and any overseas city, call us for details. The Arch is packed in a single large cardboard carton and normally ships to a commercial address What happens if my Arch is damaged in shipping? Atlantic Towers wants you to enjoy your boat, not spend the season chasing a freight claim. If your Arch arrives damaged, just refuse the shipment and we will send you a new one at no additional cost to you. Can I return my Arch if I decide I don’t want to keep it? Atlantic will accept the return of any Standard Structure within 30 days of it’s receipt by you. Simply return the Structure in the original packaging in new condition freight pre-paid and we will refund the purchase price less a 10% restocking fee Yes, for 5 years, see the section of our website for details. **NOTE: There is a 10% re-stocking charge for cancelled or returned merchandise** Due to our dedication to continued product improvement, we reserve the right to make changes without notice. Suggested Searches Climate Change Expedition 64 Mars perseverance SpaceX Crew-2 International Space Station View All Topics A-Z Humans in Space Earth & climate, the solar system, the universe, aeronautics, learning resources, news & events. 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Now that its reflective sail has deployed fully open in orbit, the  Advanced Composite Solar Sail System  can be seen in the night sky from many locations across the world! Stargazers can join NASA’s #SpotTheSail campaign by using the NASA app on mobile platforms to find out when the spacecraft will be visible at their location. The app, which is free to use and available on  iOS  and  Android , provides a location-specific schedule of upcoming sighting opportunities. A built-in augmented reality tool points users to the location of the spacecraft in real time. Can you spot the solar sail? Share your viewing experience online using the hashtag  #SpotTheSail  for a chance to be featured on NASA’s website and social media channels. Here’s how to use the sighting prediction tool:  Install and open the NASA app on an iOS or Android device. Tap on the “Featured” tab on the bottom navigation bar. Tap on the Advanced Composite Solar Sail System mission from the Featured Missions at the top of the screen. Tap on the “Sightings” tab on the bottom navigation bar. A list of all the upcoming sightings for your location will be displayed. If you are using an iOS device, you can tap on the “Sky View” link for an augmented reality guide to help you locate the spacecraft’s real-time location during the visible pass. NASA’s Advanced Composite Solar Sail System is testing new technologies in low Earth orbit, including a composite boom system that supports a four-piece sail. Not to be confused with solar panels, solar sails allow small spacecraft to “sail on sunlight,” eliminating the need for rocket fuel or other conventional propellants. This propulsion technology can enable low-cost deep space missions to increase access to space.   For ongoing mission updates, follow us on social media: X:  @NASAAmes ,  @NASA Facebook:  NASA Ames ,  NASA Instagram:  @NASAAmes ,  @NASA NASA’s Ames Research Center in California’s Silicon Valley manages the Advanced Composite Solar Sail System project and designed and built the onboard camera diagnostic system. NASA’s Langley Research Center in Hampton, Virginia, designed and built the deployable composite booms and solar sail system. NASA’s Small Spacecraft Technology program office based at NASA Ames and led by the agency’s Space Technology Mission Directorate (STMD) in Washington, funds and manages the mission. NASA STMD’s Game Changing Development program developed the deployable composite boom technology. Rocket Lab USA, Inc of Long Beach, California, provided launch services. NanoAvionics provided the spacecraft bus. 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To view this video download Flash Player GRECELL 350W Portable Solar Panel for Power Station, Foldable Solar Panel, High-Efficiency Waterproof Solar Charger Power Backup with XT60/Anderson Output for Outdoor Van Camper Boat Off-Grid Purchase options and add-ons Brand GRECELL Material Monocrystalline Silicon Product Dimensions 99.01"L x 36.41"W x 0.11"H Item Weight 19.84 Pounds Efficiency 23% Conversion Efficiency About this item 【MADE FOR SOLAR GENERATOR】GRECELL 350w portable solar panel is equipped with XT60 and Anderson output, compatible with most solar generators on the market (Jackery, Ecoflow, Bluetti, Anker portable generators, etc.), perfect for charging our GRECELL 2200w /2400w /4000w power station 【23% CONVERSION EFFICIENCY】The portable solar panel kit has built-in monocrystalline silicon solar cells that can generate energy from sunlight. It is also capable of generating up to 350W and 37.4V of mobile power, and the built-in smart chip can intelligently identify your device and maximize the conversion of light energy into electrical energy while protecting your device from overcharging and overloading 【FOLDABLE & PORTABLE】The solar panel adopts a folding design, a built-in zipper accessory bag for easy wire storage, and a non-slip rubber handle design. The stand adopts a lightweight and button design, which is lighter and more portable, and the folded size is 26.53*36.41*1.49 inches, you can easily lift it and carry it with you anywhere you want to go 【DUARBLE & IP65 WATERPROOF】The 350W foldable solar panel is made of advanced one-piece lamination technology and durable, ultra-light ETFE surface, which is durable and can effectively extend the service life of the solar panel. It can withstand IP65-level water splashes, which is very suitable for outdoor activities such as camping, hiking, picnics, caravans, RVs, cars, boats, and unexpected power sources 【GET MORE POWER】 The 350-watt solar panel supports series and parallel connections. The bracket angle of the solar panel can be adjusted through different light periods. You can expand the solar panel system through Y-cables (included) for large power stations to meet various needs. To get double power output and shorten charging time Buy it with Similar items that ship from close to you PRODUCT CERTIFICATION (1) Climate neutral by ClimatePartner certifies the carbon footprint of a product was calculated and all associated emissions were offset. Product Description Single Solar Panel For Small Power Station A single 350W solar panel is great for small device charging. Multiple Solar Panel For Large Power Station You can also parallel 2 GRECELL350W solar panels with a professional parallel connector to get more output power and recharge the high-capacity power stations faster. When two solar panels are connected in series, the voltage increases (+ to -, + to -). When two solar panels are connected in parallel, the current increases (+ to +, - to -). How to Build the Series or Parallel Connection? Grecell 350w portable solar panel for power station specifications. Peak Power 350W Solar Energy Conversion Rate 23% Solar Panel Monocrystalline Silicon Cell Connector Type Solar Connector Open Circuit Voltage(VOC) 41±5%V Short Circuit Current (ISC) 12.3±5%A Max Load Voltage/Current 37.4V/9.6A Operating Temperature -68℉ to 140℉ IP Rating IP65 Material 600D Oxford Fabric Surface Treatment ETFE Net Weight 9kg/19.84lbs Unfolded Size 99.01*36.41*0.11in Folded Size ‎26.53*36.41*1.49in From the brand We at GRECELL provide you with the right, green and portable power solutions to eliminate your power outage problems with our renewable energy storage products. Feasible to be used in outdoor,van,RV,home, you name it! With the professional R&D design team and market research operation team for years now, our major goals include making portable energy accessible for everyone around the globe. Our customers are our major priority. Portable Power Stations Visit the Store Portable Solar Panels New Release Solar Power Bundle 2400W Solar Bundles 2200W Solar Bundles Videos for this product Click to play video 350W Portable Foldable Solar Panel for Power Station Looking for specific info, product information, technical details. Brand ‎GRECELL Material ‎Monocrystalline Silicon Product Dimensions ‎99.01"L x 36.41"W x 0.11"H Item Weight ‎19.84 Pounds Efficiency ‎23% Conversion Efficiency Connector Type ‎Solar Connector Folded Size ‎26.53*36.41*1.49in Included Components ‎1* User Manual, 1* One-to-two adapter cable (MC4 to Anderson + XT60), 2* Y Branch Parallel Adapter Cable, 1* 350W Solar Panel AC Adapter Current ‎9.6 Amps Maximum Voltage ‎37.4 Volts Upper Temperature Rating ‎60 Degrees Celsius Maximum Power ‎350 Watts Manufacturer ‎Maodi Solar Technology (Dongguan) Co., Ltd. Part Number ‎ETFE-S350W Item Weight ‎19.84 pounds Country of Origin ‎China Item model number ‎Solar Panel 350W Size ‎350W Color ‎Black Batteries Included? ‎No Batteries Required? ‎No Additional Information ASIN B0D6Z1HCTG Customer Reviews 4.4 out of 5 stars Best Sellers Rank #46,167 in Patio, Lawn & Garden ( ) #214 in Date First Available June 13, 2024 Warranty & Support Amazon.com Return Policy: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions . Fields with an asterisk * are required : : : Enter the store name where you found this product : Please select province : to provide feedback. \n' + ' ' ); } function getThankYouDiv(thankMsg) { return ( ' \n' + ' ' ); } function getLoadingGifDiv() { return ' Compare with similar items 350W Portable Solar Panel for Power Station, Foldable Solar Panel, High-Efficiency Waterproof Solar Charger Power Backup with XT60/Anderson Output for Outdoor Van Camper Boat Off-Grid 100W Portable Solar Panel for Power Station Generator, 20V Foldable Solar Cell Solar Charger with High-Efficiency Battery Charger for Outdoor Camping Van RV Trip 100 Watt Portable Solar Panel for Power Station, Foldable 100W Solar Panel for Camping Hiking Off-Grid Living, Monocrystalline Folding Panel Solar with 5V USB 18V DC Output 100W Solar Panel for Power Station, 21.5V Portable Foldable Solar Panel with Fast Charger and Adjustable Kickstand Solar Cell Solar Charger for Outdoor Camping RV Travel Price $469.99$469.99 -10% $189.99$189.99 List: $209.99 $169.98$169.98 $199.99$199.99 Delivery Customer Ratings 97 582 402 97 Sold By connector type material wattage Customer reviews 5 star 4 star 3 star 2 star 1 star 5 star 82% 3% 2% 3% 10% 82% 5 star 4 star 3 star 2 star 1 star 4 star 82% 3% 2% 3% 10% 3% 5 star 4 star 3 star 2 star 1 star 3 star 82% 3% 2% 3% 10% 2% 5 star 4 star 3 star 2 star 1 star 2 star 82% 3% 2% 3% 10% 3% 5 star 4 star 3 star 2 star 1 star 1 star 82% 3% 2% 3% 10% 10% Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness. Customers say Customers like the functionality, build quality, and ease of use of the solar panel. They mention it works great, is perfect for off-grid use, and convenient for outdoor activities. Some appreciate the power source and value for money. AI-generated from the text of customer reviews Customers are satisfied with the functionality of the solar panel. They mention it works great, has excellent performance, and is perfect for off-grid use. Customers also say it's great for camping and convenient for outdoor activities. "These solar panels worked great with my Grecell portable power station. Charged it up with good wattage input...." Read more "... Panel performs as expected , and generates solar power just fine.No complaints for this product whatsoever." Read more " Works great ! Good for the next hurricane!" Read more "...The Jackery is gaining charge every time I look at it. That's excellent performance ! I got this because of the waterproof feature...." Read more Customers are satisfied with the build quality of the solar panel. They mention it's well-made and the power cables are reinforced quite well. "...Charged it up with good wattage input. They are flexible but sturdy , easy to collapse and carry away like a briefcase...." Read more "...The power cables are reinforced quite well , You can bang and shake this thing around and nothing will ever become loose or disconnected...." Read more "This panel charged better, was more durable , and cheaper than two other brands I've tried in the past...." Read more Customers find the solar panel easy to use and convenient. They mention it's a great value for the money spent. "...This panel is easy to use and it was a great value for the money spent...." Read more "... It’s convenient , i just have to opened it up and adjusted the angle to face the sun plug in the device and charge." Read more "In good winter sun, produced between 85 to 95 watts. Easy to use and set up ." Read more Customers like the power source. They say it provides a nice power source, performs as expected, and generates solar power just fine. "... Charged it up with good wattage input . They are flexible but sturdy, easy to collapse and carry away like a briefcase...." Read more "...Panel performs as expected, and generates solar power just fine .No complaints for this product whatsoever." Read more "...It provides us with a nice power source and it’s very versatile and the cables are not all over the place when in use...." Read more Customers appreciate the value of the solar panel. They mention it's easy to use and a great value for the money. "This panel charged better, was more durable, and cheaper than two other brands I've tried in the past...." Read more "Great quality and price ..." Read more Reviews with images It’s light weight and convenient for outdoor activities Sort reviews by Top reviews Most recent Top reviews Top reviews from the United States There was a problem filtering reviews right now. please try again later.. Top reviews from other countries Amazon Newsletter About Amazon Accessibility Sustainability Press Center Investor Relations Amazon Devices Amazon Science Sell on Amazon Sell apps on Amazon Supply to Amazon Protect & Build Your Brand Become an Affiliate Become a Delivery Driver Start a Package Delivery Business Advertise Your Products Self-Publish with Us Become an Amazon Hub Partner › See More Ways to Make Money Amazon Visa Amazon Store Card Amazon Secured Card Amazon Business Card Shop with Points Credit Card Marketplace Reload Your Balance Amazon Currency Converter Your Account Your Orders Shipping Rates & Policies Amazon Prime Returns & Replacements Manage Your Content and Devices Recalls and Product Safety Alerts Registry & Gift List Conditions of Use Privacy Notice Consumer Health Data Privacy Disclosure Your Ads Privacy Choices 442 COMMENTS Top 3 Best Solar Panels For Sailboats Nature Power Rigid. The nature power rigid is a large, powerful, single solar panel. If you are looking for the right panels to power your entire boat comfortably, these are the ones for you. They are very large so they will need a large flat surface area. alternatively, they can be hung vertically from rails. Marine Solar Panels for Sailboats A solar-power installation on a sailboat is made up of two independent systems: one system to charge the batteries, and another system to provide 120-volt AC power for household appliances. In the charging system, the solar panels convert sunlight into electrical current and deliver it to the batteries via a solar charge controller. The Best Solar Panels for Boats of 2024 A glass-fronted solar panel is among the most budget-friendly options, but they are not as weather resistant. Besides this, a polycarbonate version is more expensive, but they are incredibly weather resistant and have a longer life. Accessories A charge controller or maintainer is an essential component available for your boat's solar panels. Sailboat Solar Systems and How-To He's been living aboard and renovating the boat for the past 3.5 years We're excited to show you the transformation as well as how he plans to propel the boat without the use of diesel or fossil fuels! 5280w Solar System for Electric Powered Catamaran. 16 Rigid solar panels (330w each) 20kwh of Lithium Batteries. Best Solar panels for off-grid power and keeping batteries charged Giosolar 1,000W flexible solar panel. Best flexible boat solar panel. Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size. Capable of charging either 12 or 24V batteries, a kit of this magnitude is one ... Sailing with solar power: A practical guide THE AVAILABLE SPACE. In practical terms, a modern 40ft monohull would have the space for around 1,200W of PV panels (cockpit arch, sprayhood top, deck), maybe 1,500W with the addition of a few portable panels for use at anchor. The 1,200W of fixed position solar array could produce around 360Ah on a sunny summer's day (zero shading) or more ... 9 Best Solar Panels for Sailboats We had a 200w setup, nothing fancy but enough to supply our need for sailing the Bahamas. You will need between 2-8 solar panels for your sailboat. The exact amount depends on your sailboat's space and how many electronics you need to power. Most solar panels can absorb between 100-300 watts per hour. Picking the best solar panels for a sailboat: Buyer's guide The best solar panels for sailboats don't have to be powerful, but they better be efficient — find the number in the datasheet. For rigid panels anything over 18-19% is fine. Panels also should be sturdy enough to withstand seastorms. You generally also want good shading tolerance since panels often get shaded by masts and sails. What You Need To Know About Boat Solar Panels A 10-watt horizontally mounted panel should generate between 3- and 5-amp hours per day. We'll need at least 13 volts to fully charge our 12-volt battery. As most solar cells generate at least 0.45 volts, you'll want a panel with a minimum of 33 cells, which should provide around 14.85 volts. Everything you need to know about yacht solar power I felt could work as a compact, fold-out solar panel on a boat.' The couple's firm, Levante, tested the effectiveness of their origami panels extensively aboard a 36ft cruising yacht, finding that their new product was 20% lighter than other foldable solar panels and 40% more compact, whilst producing only half of the CO2 footprint. How to Install Solar Panels on a Sailboat Another factor you'll need to consider is the size of your boat battery bank. In general, a 100Ah deep cycle battery will need 180 watts of solar to fully charge, assuming you have at least four hours of sunlight a day. Thus, if you have a 200Ah battery bank, you'll need at least 360 watts of solar. In this case, two 200-watt panels would ... The Different Types of Solar Panels for Boats As boat owners seek eco-friendly and cost-effective solutions to power their vessels, solar panels offer a reliable and sustainable answer. Understanding the different types of solar panels available for boats is crucial in selecting the right solution for your needs, considering factors like space availability, budget, and desired efficiency. Thinking Through a Solar Power Installation My recommendation is for lithium battery-based systems where every 100 amp-hours of battery capacity is supported by 300 watts of installed nameplate solar panel capacity. This will ensure sufficient real-world practical solar power output to restore about 70 amp-hours of battery charge for each 8-hour day. The combined 300 watts of solar and ... Solar Panels For Boats And Yachts Solar panels, or photovoltaic (PV) cells as they are known in the industry, have evolved in the past decade. Like cell phone technology, the size of solar panels has reduced over the years, while their efficiency has risen. Recent innovations have made solar panels easier to install in non-traditional places, not to mention that the overall ... Best Solar Panels For Sailboats of 2024 WATTS/AMPS: 400W/22A. SIZE: 4 x 47.0" x 21.3" x 2.0". PROS: Includes x4 100W panels along with a charge controller and everything else needed to set up, ideal for sailors looking for a lot of power, easy mounting system, great price for a comprehensive kit. CONS: Rigid solar panels can only be on flat surfaces or mounted on rails ... Everything you need to know about installing solar panels on boats For smaller sailboats, the main job of your solar panels would be to keep the battery fully charged for your boat's electricity. For larger boats, they help reduce or eliminate the need to use the engine to provide excess power. The average 30-foot boat would require about 300-350 watts of power. Depending on your energy use and boat size ... Estimating Solar Panel Size for Boats Finally, total your charging sources, including engine, wind, and solar. For solar, take the rated wattage x 5 hours/12 = amp-hours while on passage and wattage x 7 hours/12 = amp-hours while at anchor (sails do not shade and the boom can be rigged out to the side). This is far below the rated capacity-sailors in the tropics will do better, and ... Solar Panels For Boats and Yachts Solar Panel Placement . This is where most caution needs to be taken. When choosing where you are going to place your solar panels on your yacht or boat, you need to take two big things into consideration: shading and security. When it comes to shading, you want to make sure you place your panels in an area that receives the most sunlight. SunPower Marine Flexible Solar Panels Look for the SunPower logo. Sun Powered Yachts is an authorized dealer of SunPower flexible solar panels 50W, 110W & 170W. High efficiency, marine flexible solar panels for your boat or yacht. Best warranty, highest rated & most durable. Disconnect from the dock and start sailing with the sun. This yacht sets sail with solar The Silent 60 is a solar-propelled yacht less than half the lengthBaltic yacht and price, which reaches 6-8 knots on solar power alone. The Path does not feature electric propulsion and therefore relies on diesel engines when the wind dies down. Since the Path uses a sail for propulsion, the team installed 154 bypass diodes and 12 solar panel ... 6 Best Solar Panels for Sailboats in 2023 Renogy Flexible Solar Panel 175 Watt 12 Volt. This Renogy solar panel is one of the best options for a sailboat. This product has an efficiency rate of 16-18% and will produce an average of 175 watts. The Renogy flexible solar panel is a durable and lightweight product that can easily mount on any surface. Mounting Solar Panels on a Small Boat Researching solar panels for the first time in 13 years, we discovered that much had changed. Panels produced higher output for their size, but larger panels were being manufactured to meet the ever-growing demands of boaters. Our usage had actually decreased over time as our three children grew up and moved off the boat, and the space allotted ... Sailboat Arch KIT76000 Solar Panel Mounting Kit $319. Allows you to mount solar panels anywhere on your arch. Kit contains (2) 65" lengths of 1" x 2" x 1/8" rectangular aluminum tube, (4) plastic end caps, (8) Curved Washers, and all hardware needed for installation. Some Drilling Required. Custom Solar Panel Mounts. Like a Diamond in the Sky: How to Spot NASA's Solar Sail Demo in Orbit NASA's Advanced Composite Solar Sail System is testing new technologies in low Earth orbit, including a composite boom system that supports a four-piece sail. Not to be confused with solar panels, solar sails allow small spacecraft to "sail on sunlight," eliminating the need for rocket fuel or other conventional propellants. Single Solar Panel For Small Power Station Amazon.com : GRECELL 350W Portable Solar Panel for Power Station, Foldable Solar Panel, High-Efficiency Waterproof Solar Charger Power Backup with XT60/Anderson Output for Outdoor Van Camper Boat Off-Grid : Patio, Lawn & Garden NASA Deploys Advanced Composite Solar Sail System In Space The solar sail uses a novel boom system made of flexible polymer and carbon fiber materials that can be rolled up. Credit: NASA NASA fully deployed its Advanced Composite Solar Sail System on Aug ... catamaran gulet motorboat powerboat riverboat sailboat trimaran yacht