Specification: Item Type: Solar Charge Controller Material: ABS Current: 60A Voltage: 12 24V automatic Solar Input Voltage: Less than 55V Power: 12V 900W, 24V 1800W USB Output: 5V1A Operating Temperature: -25℃ to 55℃ Protection Class: IP30 Package List: 1 x Solar Charge controller1 x User Manual Note: 1. When connecting to a 24V system, the terminal voltage of the battery board may exceed the safe voltage of the human body. If manipulation is required, insulated tools should be used and hands must be dry. 2. If the battery is reversely connected, the controller will not be damaged, but there may be negative voltage output at the load end, which may damage your load equipment. Take care to avoid this. 3. In a 24V system, if one end of the battery or solar panel is reversed, the controller is likely to be damaged. 4. A large amount of electrical energy is stored in the battery. Therefore, a short circuit of the battery cannot occur under any circumstances. We recommend connecting the fuses on the battery in series. 5. The battery may produce flammable gas, so keep away from sparks. 6. Please ensure that children keep away from batteries and controllers. 7. Follow the advice given by the battery manufacturer.