Features: 1.Full 3?level smart PWM charging management, high efficiency. Dual MOS anti?backflow circuit, low heat generation. 2.Large LCD screen with backlight, clearly displays system operating information, indicates status and data, easily switch modes and parameter configurations. 3.Charge and discharge parameters can be adjusted, with power?off memory function. Automatically recognize the 12V/24V system voltage. 4.Built?in short circuit protection, open circuit protection, reverse connection protection and over current protection, safer for using, ideal for home, industry, commercial, etc. 5.The terminals are marked with corresponding icons for connecting the battery, solar panel and DC load. Please install it in a well-ventilated place. Specification: Item Type: Solar Charge Controller Material: Plastic Output Voltage: 12(V) Usage: Solar power generation Woke Voltage: 12/24V Charging Type: PWM Maximum Input Power: 520W(12V system); 1040W(24V system) Size: Approx. 130 x 190 x 62mm/5.1 x 7.5 x 2.4in PackageList: 1 x Solar Charge Controller 1 x Wire Connector 1 x Manual