Solar Charge Controller PWM Auto Sensing System Safe Solar Panel Charge Controller 1. Wide Compatibility: Automatically detects 12V, 24V, 36V or 48V DC system voltage, compatible with various types of batteries, easy to use.2. Comprehensive system protection: aims to defend the system, controller self-diagnosis ability can judge and defend PV system short circuit; PV overcurrent; Load overload; Load short circuit; PV reverse connection; reverse battery 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 solution for charging even in cloudy environments.4. 4 Stage Safe Charging: With 4 stage charging function, batch charging, boost charging, floating charging and equalizing, the controller can achieve fast, efficient and safe battery charging, avoiding excessive gas precipitation or overheating of the battery.5. ABS, Aluminum Alloy Material: Made of high quality ABS, Aluminum alloy material, this controller is strong and durable, wear-resistant and corrosion-resistant, equipped with long service life. Specification: Item Type: Solar Charge Controller Material: ABS, Alloy Aluminum Input Voltage: DC 12V, 24V, 36V, 48V (Automatic Identification) Maximum PV Voltage: 100V How to use: Take out the product and follow the instructions. Package List: 1 x Solar Charge Controller 1 x User Manual Note: Please read the manual carefully before use.