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 KitMaterial: Monocrystalline silicon + PET + EVA + TPT shortlySolar Cell Material: High Efficiency Monocrystalline SiliconSolar Panel Power: 25WUSB Output Port: 5V 2A MaximumDC Output Port: 18V 1.38A MaximumSolar Panel Working Voltage: 18VSolar Panel Open Circuit Voltage: 21.6VPackage Material: PET+EVA+TPT Solar Panel Size: Approx. 470 x 280 x 3mm / 18.5 x 11 x 0.1inCharacteristic:1. Support high current fast charging2. Integrated intelligent charging chip3. Multiple solar panels are connected in parallel with DC5521 port to increase the output power.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 lightsPackage List:1 x Solar Panel 1 x 1.5M DC5521 Cable 1 x Car Cable 1 x Clip 2 x Buckle4 x Suction CupNote:No power storage function