AC/DC hybrid solar air conditioners suite the area where with grid power supply. 110-220V/50-60Hz/1Ph grid power is essential for hybrid system. Without grid power supply, hybrid solar air conditioners can't work at night , but at daytime, if the sunshine is ok, it can be start and drive by PV power only. Solar power will be consumed in priority, and the insufficient power will be supplied by grid. If sunshine is strong, most solar power will come from solar panels. When power generated by solar panel is not enough to run air compressor ( cloudy or rainy), electricity power will be used as pack up.. After sunset, 100% power supply will come from grid. Since there is no required in battery and solar charge controllers, compare with off grid type, the initial investment of hybrid solar air conditioners will be much lower. Most offices , factory with hybrid solar air conditioners can save 90% electricity bill because they only be used at daytime. Cut electricity bill up 99-100% for clients who are using air conditioner during daytime. At night enjoy use solar DC Inverter air conditioner with high efficiency energy save SEER 23 EEER 13.8. Also help government solve overload electricity problem by install this technology to all governmental sectors. https://www.royalstarhomeapplian...lit-air-conditioner.html