solar panel controller 1) charge and dicharge 2) 12V/24V auto, 5A ... is applied to solar street light, solar garden light, solar lawn lamp, solar lamp box, solar advertising board, solar traffic light and solar power box, solar power system ... protection(settable): 10.7V/21.4V Low voltage recovery(settable): 12.5V/25.0V No load loss ≤30mA Loop voltage drop ...