[pfflier]

A single phase generator typically will not work for your split phase (what I called 2 phase and was corrected rightly on nomenclature) appliances. If the generator is capable of split phase, it will have a connector that mates with one of these type of connectors:

https://www.calstatesolar.com/product/220v-nema-rated-receptacle/

The supply connector for the appliances will tell you what type of power they need. Single phase will be the conventional two pin and a ground you use around the house on lamps and small appliances.

Your big appliances should have connectors that will not fit in a convenience outlet.

[Magnum44]

I am almost there in understanding. I am not at the home right now so I can visually check some things later today. The Kohler I am looking at has this in its spec: Single Phase, Voltage @60 Hzs 120/240.

Thats for the 26KW unit.

The 20 KW unit actually says: Single Phase/Three Phase, Voltage @60 Hzs 120/240|277/480

There are probably only three things in the house that run 240V: The oven, the Central Air/Heat, and the clothes dryer (maybe Washer too?).