Features: 1.High Power: High efficiency monocrystalline silicon panel, which can generate more power under full sunlight and achieve the most ideal charging effect in a limited space. 2.Security Protection: The panel provides multiple protections, such as overcharge protection, overdischarge protection, short circuit protection, overload protection, reverse connection protection, etc. 3.Stable Performance: Monocrystalline silicon, metal and ABS material, high temperature resistance, IP65 waterproof, and can easily cope with the harsh outdoor environment. 4.Low Consumption: Solar battery charger automatically charges during the day and automatically shuts off at night without consuming battery power. 5.Built in Intelligent Controller: The charging algorithm of the solar battery charger has been upgraded to automatically charge during the day and shut down at night without consuming battery power. Specification: Item Type: Solar Panel Material: Monocrystalline silicon Protection Level: IP65 Solar Panel Power: 25W Controller System Voltage: 12V/24V adaptive Solar Panel Size: Approx. 540 x 280 x 3mm / 21.26 x 11.02 x 0.12in Solar Panel Operating Voltage: 18V Solar Panel Open Circuit Voltage: 21.6V Solar Panel Short Circuit Current: 1.38A (maximum) Output Port: Dual USB, DC5521 female Product Features: Integrated voltage regulator module, 5V dual USB voltage regulator output Application: 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.