This solar panel kit has reasonable design, practical functions, and can be well applied to RVs, trailers, campers, boats, yachts, cabins, tents, etc. Simple structure and excellent craftsmanship make it easy to use and have excellent durability, will provide you with good service. Features -Color: Black. -Material: Monocrystalline Silicon, ABS, Rubber, Copper. -Size: About 42.00X28.00X2.50cm/16.51X11.00X0.98in. - The solar charge controller will help you improve efficiency safely and prolong the life span of the battery. - Durability, waterproof and longevity. Lightweight and easy to use, and easy to carry. - Adopt waterproof design, high strength, achieve high wind resistance and anti-riot performance. - The controller should connect battery before connecting the solar panel, suitable for small home solar system. - It is convenient, environmental, safe, and maintain your car battery anywhere. Specification: Maximum power (pmax): 15W. Open circuit voltage : 20V. Maximum power voltage (vmpp): 18V. Short circuit ( ): 1A Maximum power (impp): 0.75A. Output: 18V. Test condition: AM=1.5. Irradiance=1000W/square meters. temperature = 25 degree centigrade. Package list: 1 x solar panel 1 x solar controller 1 charger 1 x battery clip 4 x suction cups 2 x 1 x manual