Features: 1.High Efficiency: Solar panel can efficiently convert solar energy, has high charging efficiency, and achieves optimal charging in a limited space. 2.Long Lifespan: The panel is made of highly efficient monocrystalline silicon, which generates more electricity in full sunlight, prevents weathering and wear, and has a long service life. 3.Stable Suction Cup: The kit includes 4pcs suction cups, which can play a better fixing role to prevent outdoor solar panel from loosening and falling. 4.Security Protection: The panel provides multiple protection, such as overcharge protection, overdischarge protection, short circuit protection, overload protection, reverse connection protection, etc. 5.Wide Application: Widely used in batteries for motorcycles, boat, tractor, trailer, truck, RV etc. Also be used for gate openers, electric fences, chicken coops, sheds, mobile phone, power bank,and lights. Specification: Item Type: Solar Battery Charger Kit_x000D_ Material: Monocrystalline silicon + PET + EVA + TPT shortly_x000D_ Solar Cell Material: High Efficiency Monocrystalline Silicon_x000D_ Solar Panel Power: 25W_x000D_ USB Output Port: 5V 2A Maximum_x000D_ DC Output Port: 18V 1.38A Maximum_x000D_ Solar Panel Working Voltage: 18V_x000D_ Solar Panel Open Circuit Voltage: 21.6V_x000D_ Package Material: PET+EVA+TPT _x000D_ Solar Panel Size: Approx. 470 x 280 x 3mm / 18.5 x 11 x 0.1in_x000D_ Characteristic:_x000D_ 1. Support high current fast charging_x000D_ 2. Integrated intelligent charging chip_x000D_ 3. Multiple solar panels are connected in parallel with DC5521 port to increase the output power._x000D_ Product use: It 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, mobile phone, power bank,and lights Note: No power storage function