All good things to consider one more reason for the “want” of a large generator, is for my well. The pump is a 3 phase 5 horse. It has its own transformer to change from 220 2 phase to 3 phase so I don’t have worry about that but it is 40 amps or 8800 watts plus 5000 or so for regular load i.e. fridge, furnace, ect so I need 14000 watts or so but if I am going that big I might as well get one the will drive the 5 ton ac.