ALEKO solar charge controller is a kind of intelligent, multi functional solar charge and discharge controller. All the controlling parameters can be reset flexibly to satisfy your different needs. The function of the controller is to protect the voltage overshoot and discharge. When there is no sunshine, the light intensity decreases to starting point. The controller will recognize the starting signal after six minutes. The load will start to work according to the setting parameter. When there is sunshine, the light intensity rises to start point, and then the controller recognizes the close signal after six minutes. The load will stop working. When using ALEKO solar controller, remember first to connect with the battery, then connect with the solar panel. Solar controller: 12V /24V auto Related current:10A, 20A Output loads : two USB output 5V 2A Output load: 12V/24V output normal Battery Voltage: 12V /24V Max Power of solar panel: 360W/720W No load current : below 10mA Stop charge voltage:14.7V/29.4V Low voltage recovery:12.2V/24.4V Low voltage protection: 10.5V/21.0V USB output voltage/current: 5V 2A Case: ABS Storage humidity: 10~80 percent.