During in sunny day, the solar panel can provide the power with on grid electrcity power toghther to operate
air conditioner for start running, when it running stable, the air conditioner can running just with the power from
solar panel, so it no need any electrcity at this time.
And when the air conditioner stop running at sunny day, the solar panel can produce the power to return to electrcity grid,
then it can let the power meter reverse,then save the electricity cost.
And when in cloudy day or night time, the air conditioner can automatic to switch to electrcity power.
ELECTRICITY CONSUMPTION LOWER TO 0 !!!!
NO NEED BATTERIES!