Schumacher Electric Solar Battery Maintainer, SP-400, Water Resistant, Amorphous Solar Technology, 4.8 Watts, 12 Volt, for Motorcycle, Power Sport, Car, Truck, RV, and Marine Batteries

This is the next generation battery charger for all your 12 Volts lead-acid batteries. Connect the solar panel to your battery, when not in use. It automatically charges and maintains your battery without electricity. Its energy-saving performance will save your money on battery purchases by extending the life of your batteries. Rugged design works in all weather conditions.