Maintain peak power in any 12volt battery with nocost solar energy. Maintenancefree with amorphous solar cells that charge in all weather conditions. Works in extreme temps from 40 to 176. 1watt Power Sports model attaches with suction cups (battery clamps included). 5watt and 15watt have four precut holes for easy installation, and include battery clamps, CLA adapter and 10 ft. of wire. 7amp controller protects 12volt batteries from overcharging and discharge. Available: 1watt (20″L x 11/2″H x 6.5″ W) 1.8watt (20″L x 11/2″H x 6.5″W) 5watt (18″L x 11/2″H x 14″W) 15watt (421/2″L x 3″H x 16″W) 7amp controller handles 7 amps of array current and up to 100 watts of solar power, charging and full charge indicator light

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