We have one of those Generacs too, 22.5KV, along with a 500 gallon LP tank. I’ll never have another house without it, especially here on the Gulf coast.
I dropped down to a 12KW for less propane usage. The only thing I can’t do is run the hot water heater and the “AC at the same time. In 07 we were without power for 11 days in an ice storm. After hearing the genny in my ears 24/7 I put in a free standing propane stove in the living room. Controls are battery powered so could shut the genny down at night.
2nd 15KW in the shop to run the well as needed or can be used on the house if the propane one goes down.
Wish I was a lot further south right now. Like Costa Rica.