When fishermen go out to sea to catch fish, they are generally heavily burdened with fuel for the electric generator engine for lighting, boat propulsion engines and cooking utensils on fishing boats. In the ocean around the boat, there is abundant potential for solar energy, but it has not been used as a source of electrical energy for lighting and driving fishing boats to increase the productivity and economy of fishermen. If the energy is used properly, fishermen will get cheap, sustainable electrical energy and improve the welfare of fishermen. The purpose of the study was to test the performance of solar power generators on fishing boats as a cheap and sustainable energy source. The method used is assembling and installing components, testing the solar electric generator placed on the roof of the boat, then electricity which is partly used directly and partly stored in the accumulator to stabilize and supply energy to other electrical loads. The result of this research is to produce a model of a solar electric generator on a boat.