The Coleman 6-Watt solar battery trickle charger is ideal for maintaining 12-Volt batteries in cars, RVs, tractors, ATVs, electric fences, deer feeders, boats, and more. It is weatherproof and charges in all daylight conditions, even in the shade and a built-in blocking diode protects battery discharge at night. Great for battery maintenance, it is maintenance free and easy to install. Includes: 6-Watt amorphous panel, 12-Volt DC plug, battery clamps, mounting hardware, and Quick Connect Technology. It has a maximum power output of 6-Watt, 400mAh.