ECO-WORTHY 3A PWM Solar Panel Charge Controller 12V/24V Battery Regulator 3A PWM Solar Panel Charge Controller 12V/24V Battery Regulator Nominal output(automatic identification): 12V/24V Operating current: 3A Short-term load current (60 seconds): 6A MAX Solar panel: 40W/80W Over discharge protection: 10.8V/21.6V Over charge protection: 14.4V/28.8V Float charge: 13.8V/27.6V PWM charging: YES Self-Consumption: 1.5mA/3mA Waterproof Class: IP22 Connect the battery positive and negative to the controller. Positive and negative load wires to the controller, pay attention to can not be reversed. Connect the solar panel to the controller correctly. Please follow the above sequence in strict order, otherwise it may damage the controller. The disassembly order is the opposite of the wiring sequence.