The whole home kit is the cats meow! Almost 80% on my 5-ton with the ACS4w40 (31a from 122a). The plug-in unit handles everything else. It alone is a hell of a value, with 2 soft starts in one and monitor and surge protection. Your mileage may vary but that ACS50 plug-in was even able to start my 5-ton AC. I know fon certain that if a friend or family member was in need I would be able to bring my ACS50PS and even run their smaller AC units. I highly recommend their products. They’re serving to none. Be prepared for the next storm season. It’s worth every penny ! The wife was never phased that we were on backup power for 3 days.