Features: 1Dual MOS anti?backflow circuit, low heat generation. Complete 3?level smart PWM charging management, high efficiency. 2Large LCD display with backlight, clearly displays system operating information and indicates status and data, convenient to switch modes and parameter configurations. 3Adjustable charging and discharging parameters, with power?off memory function. Automatically recognize the 12V/24V system voltage. 4Safe to use, built?in short circuit protection, open circuit protection, reverse connection protection, over current protection. Can be used for home, industry, commercial, etc. 5There 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.Item Type: Solar Charge ControllerMaterial: PlasticRated Voltage: 12V/24V battery voltageMaximum Charge/Discharge Current: 30ASolar Panel Input Voltage Range: Maximum 18-450W/36V-900WCharging Mode: PWMOver Voltage Protection: 17V.34VFull Charge Power Off: 13.7V/27.4VUnder Voltage Power Off: 10.5V/21VOver Discharge Recover Voltage: 12.2V/24.4V1 x Solar Charge Controller1 x Manual1 x Wire Connector