Built-in industrial controller. Large LCD display, all adjustable parameters. Full 4-stage PWM charge management. Built-in short circuit protection, open circuit protection, reverse polarity protection, overload protection. Dual MOSFET reverse current protection, low heat generation. Material: ABS Color: Black + Green Rated Working Voltage: 12V / 24V Rated Working Current: 30A USB Output Voltage: 5V DC Output Voltage: 12V Solar Panel Voltage: Less than or equal to 50V Float Charging Voltage: 13.7V / 27.4V Undervoltage Protection: 10.5V / 21V Undervoltage Recovery: 12.2V / 24.4V Features: Idle Loss Less than or equal to 10mA Circuit Drop: Less than or equal to 170mV Temperature Compensation: -4mV / Cell / Celsius; Working Environment: Working temperature -20 Celsius ~ +60 Celsius Storage Temperature: -30 Celsius ~ +70 Celsius Temperature Requirements: Less than or equal to 90% No Condensation: Installation Hole Wire Number: Less than or equal to 7 AWG (16mm2) / Greater than 3 AWG (25mm2) Package Contents: 1 x Solar Charge Controller Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.