1、Durable Material: Made of monocrystalline silicon, glass and aluminium alloy, solar panel is highly resistant to high temperature and water, and can easily cope with various outdoor harsh environments. 2、High Conversion Efficiency: With high charging efficiency, portable solar panel will efficiently convert solar energy, achieves the most ideal charging effect in a limited space. 3、High Strength: The robust 40W solar panel can withstand strong winds (2400 Pa) and snow loads (5400 Pa), with high strength and excellent performance in low light conditions. 4、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. 5、Easy to Install: IP67 waterproof junction box isolates environmental particles. Diodes are pre installed in the junction box. Pre drilled holes on the back allow you to quickly install the solar panel. Item Type: Solar Panel Material: Monocrystalline + glass + aluminium alloy Maximum Power: 40W Maximum Operating Voltage (Vmp): 18.24V Maximum Operating Current (Lmp): 3.39A Open Circuit Voltage (Voc): 21.8V Short Circuit Current (Lsc): 3.49A Number of Cells: 32 Junction Box Protection Class: IP67 (with diode inside the box) Mechanical Load: Front 5400Pa/back 2400Pa (static pressure) Application: 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 1 x Solar Panel