Solar Off Grid System is composed of solar panels, Solar Off-grid Inverter, MPPT charge controller and battery pack. Solar off-grid inverter is the core device of solar power system, it converts DC power produced by solar panels to AC power to provide electric energy for appliances. MPPT charge controller charges the solar electricity into batteries. When solar energy is not enough for the loads, or at night, the battery pack will discharge to replenish energy for loads.