Features: 1.Dual MOS anti?backflow circuit, low heat generation. Complete 3?level smart PWM charging management, high efficiency. 2.Large LCD display with backlight, clearly displays system operating information and indicates status and data, convenient to switch modes and parameter configurations. 3.Adjustable charging and discharging parameters, with power?off memory function. Automatically recognize the 12V/24V system voltage. 4.Safe to use, built?in short circuit protection, open circuit protection, reverse connection protection, over current protection. Can be used for home, industry, commercial, etc. 5.There are corresponding icon marks on the wiring terminals, which are used to connect batteries, solar panels and DC loads. Please install it in a well-ventilated place. Specification: Item Type: Solar Charge Controller_x000D_ Material: Plastic_x000D_ Rated Voltage: 12V/24V battery voltage_x000D_ Maximum Charge/Discharge Current: 30A_x000D_ Solar Panel Input Voltage Range: Maximum 18-450W/36V-900W_x000D_ Charging Mode: PWM_x000D_ Over Voltage Protection: 17V.34V_x000D_ Full Charge Power Off: 13.7V/27.4V_x000D_ Under Voltage Power Off: 10.5V/21V_x000D_ Over Discharge Recover Voltage: 12.2V/24.4V PackageList: 1 x Solar Charge Controller 1 x Manual 1 x Wire Connector