It's the 4th generation models, designed for low cost, easy installation and a fast payback, requiring no batteries, no inverter, no controller-just plug in solar panels to save 40-100% power in daytime compared with an electric A/C.
https://www.royalstarhomeappliance.com/solar-air-conditioner/hybrid-solar-air-conditioner/solar-air-conditioner-best-quality.html