Automobile large-area auxiliary power system based on solar power generation

The invention provides an automobile large-area auxiliary power system based on solar power generation. The automobile auxiliary power supply system comprises a solar automobile window assembly used for converting solar radiation energy illuminating the solar automobile window assembly into electric energy, an invertor used for converting direct currents generated by the solar automobile window assembly into alternating currents, a solar storage battery used for storing the alternating currents output by the inverter, an SOC detector used for detecting the charging level of the solar storage battery and sending detected results to a controller, the controller used for controlling a selector switch according to the detected results, and the selector switch used for selectively connecting the solar storage battery with an automobile load power supply circuit or connecting an on-board battery with the automobile load power supply circuit, wherein the solar automobile window assembly is arranged in the position o