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Marine Solar Panels: A Smart Investment for Your Boat or Yacht

If you own a boat or yacht, installing a marine solar panel can be a wise investment. Discover the numerous benefits of marine solar panels and gain insights into how they operate. This comprehensive guide will assist you in selecting the ideal solar panel for your boat or yacht, providing valuable considerations for your vessel’s renewable energy needs. Learn about the benefits of marine solar panels, how they work, and what to consider when choosing one for your vessel.


When it comes to boats and yachts, owners are always looking for ways to make their vessels more efficient and sustainable. In the realm of boating and yachting, embracing sustainable energy solutions has become increasingly vital. One of the best ways to achieve this is by installing a marine solar panel. Solar panels are an eco-friendly and cost-effective way to power a boat or yacht. In this article, we will discuss the benefits of marine solar panels, how they work, and what to consider when choosing one for your vessel. This article delves into the advantages of marine solar panels, explores their functionality, and presents key factors to consider when choosing the most suitable panel for your vessel.

Marine Solar Panels: A Smart Investment for Your Boat or Yacht

What are Marine Solar Panels?

Marine solar panels are devices that convert sunlight into electricity to power your boat’s appliances, lights, and electronics. They are usually mounted on the deck, roof, or railings of your vessel and connected to a charge controller and a battery bank. Marine solar panels can provide power for your lights, appliances, navigation equipment, and other electrical devices on board. Marine solar panels can reduce your dependence on fossil fuels, save you money on fuel and maintenance costs, and enhance your boating experience.

Benefits of Marine Solar Panels

There are many reasons why you should consider installing marine solar panels on your boat or yacht. Here are some of the main benefits:

Eco-Friendly: Marine solar panels are an eco-friendly way to power your boat or yacht because they use renewable energy. They do not emit any greenhouse gases or harmful pollutants into the air or water, making them an ideal choice for environmentally conscious boaters. By using solar power, you can reduce your carbon footprint and contribute to the fight against climate change.

Renewable Energy Source: Marine solar panels harness the sun’s energy, which is a clean and renewable resource. By utilizing solar power, boat owners can reduce their reliance on traditional fuel sources, leading to lower carbon emissions and a smaller ecological footprint.

Cost-effective: Marine solar panels can save you money in the long run by reducing your fuel consumption and generator usage. You can also extend the life of your batteries by keeping them fully charged and avoiding deep discharges. Additionally, marine solar panels have low maintenance costs, as they do not have any moving parts that can wear out or break down.

Cost Savings: Investing in marine solar panels can lead to significant long-term cost savings. Once installed, solar panels generate electricity for free, reducing or eliminating the need to purchase fuel for onboard generators. Additionally, maintenance costs for solar panels are generally minimal.

Reliable: Marine solar panels are reliable because they can provide power even when there is no shore power or marina available. They can also withstand harsh weather conditions, such as saltwater, wind, and UV rays. Moreover, marine solar panels have a long lifespan, typically lasting for 25 years or more.

Quiet: Marine solar panels are quiet because they do not make any noise when they operate. Unlike generators, they do not disturb the peace and tranquility of the water. You can enjoy the sounds of nature without any interference from your power source.

Quiet and Efficient Operation: Solar panels operate silently, eliminating noise pollution commonly associated with generators or other power systems. This allows for a peaceful and enjoyable boating experience, devoid of engine noise or vibrations.

Flexible: Marine solar panels are flexible because they come in different shapes, sizes, and types to suit different boats and needs. You can choose from rigid or flexible panels, monocrystalline or polycrystalline cells, and various wattages and voltages. You can also customize your system by adding more panels, batteries, or inverters as needed.

Increased Independence: With marine solar panels, boat owners gain greater independence from shore power or fuel stations. Solar panels can continually charge onboard batteries, providing a reliable source of energy for various applications, such as powering lights, navigation systems, refrigeration units, and other essential equipment.

Environmental Friendliness: Solar panels produce electricity without emitting harmful greenhouse gases or pollutants. By adopting solar power, boaters contribute to a cleaner and healthier marine environment, preserving the beauty of our oceans for future generations.

How Marine Solar Panels Work

Marine solar panels, also known as marine photovoltaic (PV) panels, employ photovoltaic cells to convert sunlight into electricity. The solar panel absorbs sunlight and converts it into direct current (DC) electricity. An inverter then converts the DC electricity into alternating current (AC) electricity, which can be used to power the boat’s electrical systems.

Marine solar panels work by converting sunlight into direct current (DC) electricity using photovoltaic (PV) cells. The DC electricity then flows to a charge controller, which regulates the voltage and current to prevent overcharging or undercharging the batteries. The charge controller also displays the battery status and the solar panel performance.

The batteries store the electricity for later use when there is no sunlight or when the demand is higher than the supply. The batteries are usually 12V or 24V deep cycle batteries that can handle repeated charging and discharging cycles.

The electricity from the batteries can be used to power DC appliances and devices directly, such as LED lights, fans, pumps, radios, etc. However, if you want to power AC appliances and devices, such as TVs, laptops, microwaves, etc., you need an inverter. The inverter converts the DC electricity into alternating current (AC) electricity that matches the standard household voltage and frequency.

Here’s a brief overview of their functioning:

  • Sunlight Absorption: When solar panels are exposed to sunlight, their photovoltaic cells absorb photons (light particles) from the sun’s rays.
  • Electron Excitation: As photons are absorbed, the energy dislodges electrons from the atoms within the cells, creating an electric current.
  • Direct Current Conversion: The electric current produced by the solar cells is in the form of direct current (DC). To make it compatible with onboard systems, such as lights and appliances, an inverter is used to convert DC into alternating current (AC).
  • Battery Charging: The generated electricity can be stored in batteries for later use. This stored energy can power various onboard devices, even during times of low sunlight.

Factors to Consider when Choosing Marine Solar Panels


There are two main types of marine solar panels – rigid and flexible. Rigid panels are more durable and efficient, while flexible panels are lightweight and easier to install.

Size and the Shape of your boat

The size of the marine solar panel you choose will depend on the amount of power you need and the available space on your boat. It’s important to choose a panel that is the right size for your vessel to ensure that it can provide enough power. You need to measure the available space on your boat where you can mount the solar panels. You also need to consider the curvature and angle of your boat’s surface, which may affect the performance of the solar panels.


Look for marine solar panels that have a high efficiency rating. Higher efficiency panels can produce more power with less sunlight, making them a better choice for boats that do not have a lot of available space for solar panels.

Power Output

Assess your vessel’s energy needs and choose marine solar panels with an adequate power output to fulfill those requirements. Consider the electrical load of your onboard equipment and appliances, ensuring that the solar panels can generate enough energy to support them. You need to calculate how much electricity you need for your daily activities and appliances on board. You can use a watt-hour meter or a power consumption chart to estimate your energy usage. Then you need to divide this number by the average sun hours per day in your location to get the required wattage of your panels.

The Type and Quality of the solar panels

There are different types of solar panels for boats, such as monocrystalline, polycrystalline, thin-film, and flexible. Each type has its own advantages and disadvantages in terms of efficiency, durability, cost, and aesthetics. You also need to look for high-quality solar panels that have Sunpower cells, potted junction boxes, easily mountable frames, waterproof connectors, and corrosion-resistant materials.

The Accessories and Components of the solar system

You need to choose a compatible charge controller, battery bank, inverter, wiring, fuses, switches, and mounting hardware for your solar system. You also need to ensure that they are properly installed and configured according to the manufacturer’s instructions.

Space Availability

Determine the available space on your boat or yacht for mounting the solar panels. Consider the dimensions and design of the panels, selecting ones that can be easily integrated into your vessel’s structure without hindering its functionality or aesthetics. You need to measure the dimensions of your deck or roof and determine how many panels you can fit. You also need to consider the shading from masts, sails, antennas, etc., that can reduce the panel efficiency.

Durability and Marine Grade Construction

Opt for marine solar panels specifically designed to withstand harsh marine environments. These panels should be constructed with durable, corrosion-resistant materials to withstand exposure to saltwater, UV radiation, and other challenging conditions.

Warranty and Support

Check the warranty and after-sales support offered by the manufacturer. A reliable warranty ensures that you have recourse in case of any defects or issues with the panels. Additionally, consider the availability of technical support and resources to assist you with installation and maintenance.


Question: How long do marine solar panels last?
Answer: The lifespan of solar panels is generally 25-30 years. However, a solar panel won’t die after 25-30 years – rather, its power output will decrease a significant amount below what the manufacturer projected1. The lifespan of flexible solar panels is shorter than that of rigid ones. Flexible solar panels tend to see their primary stress from how they are bent for installation. As a result, owners can expect their panels to last roughly 5 to 15 years.

Question: Can marine solar panels be used to power all of my boat’s electrical systems?
Answer: Yes, marine solar panels can be used to power all of your boat’s electrical systems. Solar panels are used to keep your boat’s battery charged, using clean solar energy. Where you’d normally have to burn fuel to keep the power on, marine solar panels eliminate this need entirely. If you have a yacht, you can stay out at sea for longer using your marine solar panels to provide all the electricity you need. For smaller sailboats, the main job of your solar panels would be to keep the battery fully charged for your boat’s electricity.

Question: Do I need to install a charge controller with my marine solar panel?
Answer: 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. A solar charge controller or regulator will regulate the voltage and current coming from your solar panels going to your battery. Most solar panels are 16-25 volts, so if there is no voltage regulation the batteries will be damaged from overcharging.

Question: Can marine solar panels work at night?
Answer: No, marine solar panels cannot work at night. They require sunlight to generate electricity. However, you can use batteries to store the energy generated during the day and use it at night.

Question: Can marine solar panels power my entire boat?
Answer: The maximum power output of marine solar panels varies depending on the model. For example, the Newpowa 100 Watts 12 Volts Polycrystalline Solar Panel Marine has a maximum power output of 100 watts. One 100-watt solar panel that receives direct sunlight for 5 hours will produce approximately 500 Wh of electricity. However, it is important to note that the amount of energy produced by marine solar panels depends on several factors such as the size of the panel, the amount of sunlight it receives, and the efficiency of the panel. To answer the question, it is possible to power your entire boat with marine solar panels. However, you will need to calculate your energy needs and determine how many solar panels you will need to meet those needs. You may also need to use batteries to store the energy generated during the day and use it at night.

Question: Do marine solar panels require a lot of maintenance?
Answer: Marine solar panels require very little maintenance, especially if they are on a tilt, as rain can wash away any debris. It is generally recommended that you perform solar panel cleaning between two and four times per year. You can use a monitoring app to help you keep track of the amount of energy your panels produce.

Question: How much do marine solar panels cost?
Answer: The cost of marine solar panels starts at £70 for the smallest panels, which are typically 30 watts. However, the cost of marine solar panels can vary depending on the size and wattage of the panel.


Installing a marine solar panel is a great investment for boat and yacht owners who are looking for a sustainable and cost-effective way to power their vessels. By choosing the right type, size, and efficiency rating, boaters can ensure that their marine solar panel will provide reliable power for years to come. If you’re considering installing a marine solar panel on your boat or yacht, be sure to consult with a professional to ensure that you choose the right panel for your needs.

Jane Smith is a renowned product reviewer and influencer, has earned widespread acclaim for her discerning and thorough evaluations of a diverse range of consumer goods. Her captivating reviews span technology, beauty, and home products, providing invaluable guidance to millions of discerning shoppers worldwide. Samantha's dedication to transparency and her knack for simplifying complex product features have cemented her reputation as a go-to authority in the world of product reviews. She is also a regular contributor to several online and print magazines, such as Cosmopolitan, Elle, and Glamour. Jessica is passionate about discovering and recommending the best products for her audience, as well as supporting ethical and sustainable practices in the beauty industry. She is based in Los Angeles, California, where she lives with her husband and two dogs. You can follow her at [email protected]