Step Down Module DC DC Input 6-36VDC Output 1.25-32VDC MPPT Solar Charging Panel Item Type: Step Down Module Output Constant Current Range: 0.1-5A, long-term working current is recommended within 3A Output Turn Range: 0.1-5A current range will have errors due to differences in part parameters Working Frequency: 180Khz Short Circuit Protection: Yes (limit current is the set constant current value) Over Temperature Protection: Yes (automatically turn off the output after over temperature) Input Reverse Connection Protection: None (if necessary, please input the diode in the input) Output Anti-Backflow Protection: No, anti-reverse diode must be added when the output is connected to the battery, otherwise the module will be burned out. Installation Method: 4 x 3mm screw Wiring Method: Terminal IN is input and OUT is output Module Size: Approx. 60 x 31 x 22mm / 2.4 x 1.2 x 0.9in(without header) Charging Indication: red light when charging, green light when full. The detection method of the turn signal is current. When using solar panels to supply power, the solar hour charging current is also small, lower than the turning current, and will also light green, but it is not full at this time, please pay attention to distinguish. Using a live meter will see the charging current more directly