Feature 1 Wide Compatibility: Automatically detect 12V, 24V, 36V or 48V DC system voltage, compatible with a variety of battery types, easy to use. 2 Comprehensive System Protection: Aimed to defend your system, self diagnosis capability of the controller can evaluate and defend PV array short circuit; PV overcurrent; load overload; load short circuit; PV reverse connection; battery reverse connection; overheating. 3 PWM Design: Innovative PWM technology, the tracking efficiency is as high as 99%, and the peak conversion efficiency is as high as 98%. It is the best charging solution even in cloudy environments. 4 4 Stage Safe Charging: With 4 stage charging function, batch charging, boost charging, float charging and equalizing charging, the controller can achieve fast, efficient and safe battery charging, avoiding excessive gas precipitation or battery overheating. 5 ABS, Aluminum Alloy Material: Made of premium ABS, aluminum alloy material, this controller is strong and durable, wear resistance, and corrosion resistance, comes with a long life pan.Item Type: Solar Charge ControllerMaterial: ABS, Aluminum Alloy Input Rated Voltage: DC 12V, 24V, 36V, 48V (Automatic Identification)Maximum PV Voltage: 100V Package List1 x Solar Charge Controller1 x ManualNotePlease read the manual carefully before use.