Photovoltaic air conditioner power supply method and photovoltaic air conditioner power supply system

The invention discloses a photovoltaic air conditioner power supply method and a photovoltaic air conditioner power supply system, and relates to the technical field of air conditioner power supply, and the photovoltaic air conditioner power supply method comprises the following steps: obtaining a first output current and a first output voltage of a photovoltaic power supply circuit; and determining the illumination intensity corresponding to the first output current according to the obtained first output current and the corresponding relation between the first output current and the illumination intensity. And determining a first voltage threshold range corresponding to the illumination intensity according to the determined illumination intensity and a corresponding relation between the illumination intensity and the first voltage threshold range. Judging whether the first output voltage is within a first voltage threshold range or not; if yes, the photovoltaic power supply circuit is controlled to supply po