This NPower 1.8 Watt amorphous solar panel is ideal for cars, ATVs, PWCs, light duty trucks, SUVs and all 12V batteries. Its an effective way to replenish your batteries for quick starts. Clean and quiet operation. Built-in blocking diodes prevent discharging at night. Ultra-bright blue LED charge indicator. No installation required. Application: Battery charging 12V, maintenance, Watts: 1.8, Dimensions L x W x H (in.): 19 5/8 x 6 1/2 x 1 1/8, Material: Plastic, amorphous solar cells, Panels (qty.): 1, Battery Included: No, Includes: Panel, clamps, 12V plug, suction cups Works in low light and cloudy conditions Self-regulated unit will never overcharge your batteries; simply plug in and it begins working immediately with no maintenance Comes with 12V power source adapter, battery clamps and suction cups to allow window mounting