Features Power Off Memory: Automatic identification of 12V 24V system voltage, a series of parameter settings and power-off save function, no need to repeat settings. Using temperature compensation, the charging parameters can be adjusted automatically. Long Battery Life: The upgraded 3-level P charging algorithm is used to balance the battery on a regular basis or when it is over-discharged, which can effectively prevent the battery from being unbalanced and vulcanized, thereby extending the battery life. Support Load Start: A variety of load operation modes are available, which is convenient for the product to be suitable for different types of loads. Adopt advanced load starting method, which can start large capacitive load smoothly. with industrial grade. Multiple Protections: The solar charge controller provides overcharge, overdischarge, overload protection, as well as short circuit protection, TVS lightning protection, optional communication function: provides RJ12 data port, output TT1232 level or Bluetooth signal, data adopts standard hobu protocol, can be Use with the host computer monitoring software or mobile APP. Simple Operation: The controller provides a dot graphic LCD screen and a HMI with 2 buttons. The user-friendly design and dynamic interface of the browser ensure the convenience and intuitiveness of operation. Specification: Item Type: Solar Charge Controller Material: ABS Current: 20A Voltage: 12 24V automatic Solar Input Voltage: Less than 55V USB Output: 5V1A Operating Temperature: -25℃ to 55℃ Protection Class: IP30 Package List: 1 x Solar Charge controller 1 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 safety advice given by the battery manufacturer. Package List 1 x Solar Charge controller 1 x User Manual