Input voltage: 12V/24V Auto Charge current: 20A Discharge current: 20A Max solar input: <50V Equalization: B02 Gel 14.2V Float charge: 13.7V(Defaul, adjustable) Discharge stop: 10.7V(Defaul, adjustable) Discharge Reconnect: 12.6V(Defaul, adjustable) USB Output: 5V/2.1A Self-consume: < 10mA Operation temperature: -35 to 60C Size: 160 x 98 x 40mm Color: Black Microcontroller digital accuracy, PWM control Graphical LCD Display Electronic protection functions External fuse 40A x 1 USB output port x 2, Total 5V 2.1A DC Port x 2, 12V/24V for LED Lamp Automatically manage the working of solar panel and battery in solar system. Easy to set up and operate Suitable for small solar energy system.