Features 1、DURABLE MATERIAL: : The solar panel frame has a low iron toughened glass surface and aluminum frame, which can prevent weathering and wear and has a long service life. The panels are made of highly efficient monocrystalline silicon, which generates 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、HIGH EFFICIENCY: The monocrystalline silicon panel, which can generate more power under full sunlight and achieve the most ideal charging effect in a limited space. 5、WIDE APPLICATION: 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, and lights. Specification Item Type: Solar Panel Material: Monocrystalline silicon Protection Level: IP65 Solar Panel Power: 20W Solar Panel Operating Voltage: 18V Solar Panel Open Circuit Voltage: 21.6V Solar Panel Short Circuit Current: 1.11A (maximum) Controller System Voltage: 12V/24V adaptive Output Port: Dual USB, DC5521 female Solar Panel Size: Approx. 330 x 360 x 3mm / 13.0 x 14.2 x 0.1in Product Characteristics: Integrated voltage regulator module, 5V dual USB voltage regulator output Application: 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, and lights. Package List 1 x Solar Panel 1 x Controller 1 x Clip Line 1 x Car Charging Cable 4 x Sucker 2 x Buckle 1 x User Manual