General description This 10W 18V Solar Panel Car Battery Charger is a portable and waterproof power trickle charger designed for cars, boats, and RVs. It features high-efficiency solar technology that doubles the output working current, ensuring effective performance even in low light conditions. The internal diode prevents electricity leakage at night, making it a reliable choice for maintaining your vehicle's battery. Technical specifications Material: PET + monocrystalline silicon cell Waterproof grade: IP65 Solar energy conversion rate: 22% Maximum power: 10W Working voltage: 18V Open circuit voltage: 21.5V Working current: 0.55A Short circuit current: 0.63A Product net weight: 350g Product size: 285 x 265 x 2 mm NOCT (nominal operating temperature of the battery): 40-85°C Working temperature: -35 to 60°C Compatibility and accessories Compatible with car batteries Packing list: 1 x solar panel, 4 x suction cups, 1 x car charger, 1 x battery clip Usage This solar panel charger is