Electric Outboard Boat Motors

How to Fit Your Electric Boat with a Solar Battery Charger

Because of its silent operation, cheap operating costs, and environmental advantages, electric boating is quickly becoming more and more popular. Adding a solar battery charger is a wise move if you want to increase the sustainability and efficiency of your electric boat. To make the most of your investment, this guide will show you how to install a solar battery charger on your electric boat.

For an Electric Boat, What Justifies the Use of a Solar Battery Charger?

It's critical to comprehend the advantages of a solar battery charger for boat before beginning installation. By using solar chargers, you can reduce your dependency on shore power to maintain your electric boat’s batteries. If you’re a cruising sailor or keep your vessel on a mooring, solar charging for your boat is probably a necessity. If you keep your boat in a slip, solar charging may not be as critical, but it will reduce your electricity costs and your carbon footprint although by exactly how much depends on the energy mix of your local utility. 

Assembling the Required Tools

In order to install a solar battery charger on your boat, the following tools are required:

- Solar energy

- Charge controller 

- Brackets for mounting

- Connectors and cables

- Circuit breaker or fuse 

- Tools (drill, screwdriver, etc.)

Make sure the solar charger kit is appropriate for the battery system on your boat. It's a good idea to compare the electric boat price for solar chargers to pick one that suits your spending plan. Electric outboard manufacturers like Torqeedo and ePropulsion sell solar charge controls that are specifically designed for their batteries. If you’re using third party batteries, you’ll need a third party charge controller. 

Detailed Installation Instructions

  1. Develop Your Boat's Energy Requirements

Determine the energy consumption of your electric boat and the optimal number and size of solar panels to begin with. Consider factors such as battery bank capacity, average daily energy usage, operating voltage of the battery system for propulsion and house battery, the size of your electric outboard, electric pod drive, or electric inboard motor.

  1. Select the Best Location for Installing Solar Panels

On your electric boat, pick a location where the sun shines for the majority of the day. The deck, cabin roof, or Bimini top are typical choices. Ensure that the panels are placed well away from any obstructions, including antennae or navigation lights.

  1. Install the mounting brackets.

Once a location has been determined, fasten the mounting brackets. Tighten the screws or bolts to ensure that the brackets are firmly fixed. Be sure to waterproof the attachments using sealant appropriate for the hull/decking material. Stability of the panels is important, especially with heavy wind loads. 

  1. Secure the photovoltaic cells.

Attach the solar panels to the brackets for mounting. Be sure they are positioned correctly to receive the most sunlight possible. Tighten all nuts and screws to prevent movement or damage while operating.

  1. Fasten the Charge Controller.

The charge controller regulates the voltage and current flowing from the solar panels to the battery to prevent overcharging. Connect the solar panels to the charge controller using the appropriate connections. Generally most solar panels use MC4 connectors. Buy opposite MC4 connectors and some wire length. Make sure all connections are tight and follow the manufacturer's guidelines for wiring.

  1. Attach the charge controller and battery.

Next, the boat's battery bank needs to be linked to the charge controller. Cables must be run from the controller's output terminals to the battery terminals in order to do this. Make sure you are using the proper gauge of wire in order to control the current and prevent overheating.

  1. Install a fuse or circuit breaker.

For safety, place a circuit breaker or fuse between the battery and the charge controller. This protects the system from possible overloads and short circuits. The fuse or breaker needs to be positioned as close to the battery as is practical.

  1. Examine the Infrastructure

Check all of the connections after the wiring is finished. Turn on the system and monitor the charge controller's display to ensure sure the solar panels are correctly charging the batteries. Look for any odd numbers or error warnings. Generally the solar panels should be capable of producing at least the voltage of the battery bank. 12V systems are easiest but most larger battery packs for higher horse power motors operate on 48v, 96v, or 360v. The charge controller should operate that these voltages as well. If panels are producing electricity from the sun the charge controller will begin charging the battery. Common issues are loose wiring, too low a voltage to charge, minimal amperage and measly charging. 

Maintenance of Your Photovoltaic Battery Charger

Maintaining your solar battery charger on a regular basis will keep it working efficiently. Periodically clean the solar panels to get rid of dirt and debris that might make them less efficient. Additionally, look for indications of wear or damage on any connections and wiring.


Your electric boat will benefit from a solar battery charger installation in the form of lower energy expenses and longer battery life. You may use solar energy to power your boat sustainably and efficiently by following these instructions.

Are you prepared to convert your electric yacht to solar power? To meet your demands, EMO Electric provides a selection of premium solar chargers and accessories. We can help you find new or used electric outboard motors, affordable electric boat rates, or dependable solar chargers for boat batteries. Take a look at our items on our website and get started on your way to a more eco-friendly and productive sailing experience.

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