Harness the power of the sun with the Schumacher SP-200 Solar Battery Maintainer. Trickle-charge your 12V battery and extend battery life with no electric outlet needed. This water-resistant solar panel utilizes amorphous solar technology that even works in cloudy conditions. It is great for boats, cars, motorcycles, trucks, and more. Mounting hardware is included, allowing you to permanently install the solar maintainer in a convenient location. Product Features:Maintains 12V lead-acid batteriesExtends battery lifeWorks in cloudy conditionsWater resistantEnvironmentally safeMinimal maintenanceIdeal for boats, cars, motorcycles, snowmobiles, trucks, RVs, and more