In all weather conditions, this works with autos, RVs, boats, tractors, ATVs, electric fences, deer feeders and more; Made of durable ABS plastic with an amorphous solar cell; bright blue LED indicates charging; Includes a 7-amp charge controller, 4 stainless steel screws, battery clamps, a CLA adapter and 12 wire; Temperature range:-40176° max output: 15 watts/1 amp; 40Lx14W";