Solar power generation off-grid system is composed of a whole set of components to complete the normal power generation and supply. The solar power generation system uses solar panels to convert solar energy into electricity when there is light, and supplies power to the load through the solar charge and discharge controller, and charges the battery at the same time. In cloudy weather or no light, through the solar charging and discharging controller by the battery to DC load power, at the same time, the battery also directly to the independent inverter power supply, through the independent inverter inverter into AC power, AC load power supply.