PWM Solar Charge Controller Automatic Protection Detection System Safe Charging Solar Panel Regulator Function: 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: Aimed at system defense, the controller's self-diagnosis ability can judge and defend PV array short circuit; PV overcurrent; Load overload; Load short circuit; PV reverse connection; reverse battery connection; Overheating.3. PWM Design: Innovative PWM technology, tracking efficiency is up to 99% and peak conversion efficiency is up to 98%. It is the best solution for charging even in cloudy environments.4. 4 stage safe charging: with 4 stage charging function, batch charging, pulse charging, hover charging and equalizing charging, 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 premium ABS, aluminum alloy, this controller is strong and durable, wear-resistant and corrosion-resistant, has a long service life. Specification: Item Type: Solar Charge Controller Material: ABS, Aluminum Alloy Rated Input Voltage: DC 12V, 24V, 36V, 48V (Automatic Identification) Maximum PV Voltage: 100V Package List: 1 x Solar Charge Controller 1 x Manual Note: Please read the manual carefully before use. How to use: Take out the product and follow the instructions.