Feature: 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 PanelMaterIal: 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 Package List: 1 x Solar Panel1 x Controller1 x Clip Cable1 x On Board Charging Cable4 x Suction Cup2 x Buckle1 x Instruction Manual Note: Please read the instruction manual carefully before installation