What Size Solar Battery Charger for Boat

If you are a boating enthusiast, you understand the importance of having a reliable and sustainable power source for your boat batteries. Whether you're fishing, cruising, or camping, you need constant and dependable power to make your marine experience comfortable and enjoyable.

solar battery charger

Fortunately, there is a reliable and sustainable way to power your boat battery - harnessing solar energy using a solar battery charger!

Solar power is an easy and cost-effective way to keep your gadgets and appliances running smoothly. With the right size of solar charger, you can easily keep your boat powered up, no matter where you are.

In this article, we will guide you on how to determine the right size solar-powered battery charger, and provide you with valuable information to help you choose the best Jackery solar generator for your needs.

Features of a Solar-Powered Battery Charger  

A solar-powered battery charger is a system that harnesses the sun's powerful energy to generate electricity. It typically consists of a solar panel, a solar charge controller, and wiring to connect everything together.

The solar panel converts sunlight into electrical energy, while the charge controller regulates the amount of power going into the battery. It also prevents overcharging and ensures that the batteries are charged efficiently. The wiring ensures a safe and efficient connection between the components.

Solar Panels

There are three major types of solar panels available: monocrystalline, polycrystalline, and thin film panels. They all vary in appearance, performance, and cost.

  • Monocrystalline solar panels (Mono-SI)

Monocrystalline panels are made from a single, pure crystal structure, which provides maximum efficiency and performance. The high-quality monocrystalline silicon allows these panels to deliver higher power output, occupy less space, and last longer than any other type of solar panel. This makes them the go-to option for many boat owners to provide power for appliances like TV, microwaves, and air conditioning.

  • Polycrystalline solar panels (Poly-SI)

Polycrystalline panels are made of multiple interconnected crystalline silicon cells, which provide relative efficiency (around 15%) to monocrystalline panels but at a lower cost. These panels have the same dark, uniform look as monocrystalline panels, but the cells have a distinct square shape.

  • Thin film panels

If you are looking for a less expensive option, you can consider thin-film solar panels. These are made of amorphous silicon deposited in layers onto a substrate to form solar cells. This makes them lightweight and flexible, making them easier to install.

However, these panels are less efficient and durable than mono or polycrystalline panels. They are also more sensitive to heat, which can reduce their power output.

Solar Charge Controller  

A solar charge controller keeps the boat's battery from overcharging by regulating the amperage and voltage delivered to the battery. This component is essential to prolong the life of your solar charger battery and prevent any damage.

It allows smooths charging, maximizing the current up to approximately 80%, then reducing it as the battery reaches full capacity, and finally maintaining a "float" or "trickle" charge to keep the battery full and ready for use. Jackery's solar generator has an advanced MPPT solar charge controller to ensure your battery lasts longer.


Solar cables connect the components of a photovoltaic system and serve as a conduit where power flows from the solar panel to the battery and other devices. They are required to have resistance against UV light, extreme temperatures, and weather conditions.

The size of the cable you need depends on both your system's voltage and amperage. The thicker the wire; the higher the amp capacity. Jackery solar battery charger for boats is equipped with high-quality, corrosion-resistant cables that are specifically designed and certified for marine environments.

Types of Solar Battery Chargers  

There are several types of solar battery chargers: Trickle charges, light-use charges, and high-output solar chargers. Each type of solar battery charger has its own specific features and capabilities, and the choice of which one to use depends on the intended application and the specific needs of the user. You want a solar panel battery charger for boats that can provide enough electricity to power your appliances while on the go.

Trickle Charging

Trickle charges are designed for maintaining the charge of a battery over a long period of time, making them ideal for use in low-power applications such as charging boats that are not used frequently.

They prevent batteries from losing charge allowing you to run all your appliances even when not sailing. These low-voltage charges are designed to improve battery health and longevity. Since all batteries self-discharge, a trickle charger can keep your boat's battery fully charged when it is on a trailer, at a mooring, or sitting at her slip.

Light-Use Charging

These are small, lightweight chargers that can be easily carried around and used to charge small electronic devices such as smartphones, tablets, and cameras. They are portable so they can be used anywhere and anytime.

Heavy Power-Use Charging

High-output solar chargers are designed for charging multiple batteries at once or for powering up large appliances, lighting systems, and other heavy-duty equipment. They can deliver high power outputs, making them ideal for use in remote off-grid locations where there is no access to traditional power sources.

Jackery's solar battery chargers are high-output solar panel kits specially designed to provide maximum power output and efficiency that are sure to make your boat's living experience enjoyable.

Benefits of Solar Battery Charger for Boat

Installing one or more photovoltaic solar panels on your boat is a great way to keep your appliances running. They help augment or replace other power sources, such as fuel generators.

Photovoltaic solar chargers such as Jackery Solar Generator 2000 Pro provide clean and free energy, whisper-silent operation, and zero emissions. In addition, they can also help you save money on fuel costs and reduce your environmental impact.

Harnesses the Sun’s Energy

When the sun shines onto a solar panel, it is absorbed by the photo-voltaic cells and converted into usable electricity. This energy is then used to light up your boat and power your electronics. This is a truly renewable, sustainable, and eco-friendly solution. .  

Silent and Fuel Free

This is perhaps one of the biggest advantages of using solar power. As opposed to fuel-powered generators, solar panels are whisper-silent when generating electricity. This makes them great for use on boats, where noise can be a major nuisance. They are also fuel-free, so you don't need to worry about running out of fuel when you're in the middle of nowhere.

Little to No Maintenance

Since solar panels are designed to be used outdoors, they can withstand harsh elements such as saline water and high temperatures. They also don't have moving parts, so there is virtually no maintenance required. All you need to do is keep them clean and check the wiring periodically to ensure optimum performance.


If you are looking for a reliable and sustainable way to generate electricity for your boat, solar panel battery chargers are an excellent option. They provide clean and free energy, are whisper-silent, and require little to no maintenance. When looking for a solar charging unit, you want to make sure you choose one that fits your needs, is of the highest quality and has the right features.

Jackery Solar Generator 2000 Pro is a high-output solar battery charger for boats that is specially designed to provide maximum power output and efficiency. It is perfect for use in sailboats allowing you and your loved ones to live comfortably in your sailboat and explore the great outdoors without having to worry about running out of power.

With Jackery Solar Generator 2000 Pro, you can always feel confident that you have a reliable and sustainable power source for a truly enjoyable and stress-free boating experience. So, what are you waiting for? Sign up for our newsletters to learn more about our solar panels and get exclusive offers!