Features: 1.Wide Applicability: This polysilicon solar charging panel is suitable for motorcycles, boat, tractor, trailer, truck, lawn mower, RV etc. Also be used for gate openers, electric fences, chicken coops, sheds, and lights. 2.High Efficiency: Made of polysilicon and metal, high temperature and water resistance, and can easily cope with the harsh outdoor environment. It has a high charging efficiency to achieve the most ideal charging effect in a limited space. 3.Sturdy Construction: The solar panel frame is made of low iron tempered glass surface and rust resistant aluminum frame, which can prevent wear and tear for a long service life. The polycrystalline silicon panel can generate more electricity every day under sunny conditions. 4.Battery Protection: The charge controller can prevent battery overcharge, overdischarge, overvoltage, short circuit and reverse current problems. It prevents the battery from depleting due to long time non use. Indicators on the controller make it easy to know the status of charging and discharging. 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 Charger Set Solar Cell: Polycrystalline silicon Protection Level: Ip65 Solar Panel Power: 10W Controller System Voltage: 12V/24V Adaptive Solar Panel Working Voltage: 18V Solar Panel Open Circuit Voltage: 21.6V Solar Panel Short Circuit Current: 0.55A (Maximum) Output Port: Dual USB, DC5521 Female Product Features: Integrated voltage regulator module, 5V dual USB voltage regulator output Solar Panel Size: Approx. 435 x 200 x 3mm / 17.12 x 7.87 x 0.118in Fitment: 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