Features: 1.Solar Panel: Adopted tempered glass surface, which can prevent weathering and wear, long service life, made of high efficiency monocrystalline silicon, can generate more electricity in full sunlight. 2.Battery Protection: The charge controller can prevent battery overcharge, overdischarge, overvoltage, short circuit and reverse current, extend battery life. 3.Intelligent Control: Automatic charging during the day, shutdown at night, reduce nighttime consumption, improve daytime efficiency, and do not consume battery power. 4.Practical: High temperature resistance and waterproof, can easily cope with outdoor harsh environment, has high charging efficiency, with four suction cups, prevent falling. 5.Kit Includes: Package includes 12W monocrystalline solar panel, electric controller, etc., which can be widely used in RVs, motorcycles, ships, tractors, trailers, trucks, lawn mowers. Specification: Item Type: RV Solar Panel MaterIal: Polysilicon + metal + ABS Protection Class: IP65 Solar Panel Power: 12W Solar Panel Working Voltage: 18V Solar Panel Open Circuit Voltage: 21.6V Solar Panel Short Circuit Current: 0.55A (Maximum) Controller System Voltage: 12v/24v Adaptive Controller Working Temperature: -35+60 Output Port: Dual USB, DC 5521 Female plug Solar Panel Size: Approx. 280x280x3mm/11.02x11.02x0.12in Features: Integrated Voltage Regulation Module, 5V Dual Usb Regulated Output Application: Can be widely used in batteries for motorcycles, boat, tractor, trailer, truck, lawn mower, RV etc. Also be used for gate openers, electric fences, chicken coops, sheds, and lights Note: Please read the instruction manual carefully before installation