Having had Geothermal in a former house and liked it a lot, I had the current propane furnace removed in the current house & went Geothermal again. Good Fed tax credit available at the time, elec Co REMC gives breaks for electric heated homes, and County gives homeowners a tax break w/Geothermal too.
It doesn’t use a lot of electricity (except it the emergency heat coils ever need to kick in) but that has only happed briefly maybe x2 during the past 5 yrs. Also have acreage/trees for the free standing wood stove in the basement.
I recently purchased a 12,000w portable dual-fuel generator that can run off propane bottles and/or gasoline. I looked at getting a
transfer switch, until I stumbled upon this inexpensive & nifty Interlock device for about $50 bucks.
View attachment 95121
https://www.geninterlock.com/manufacturers/
Good YouTube video:
https://youtu.be/GbtRxcb-cmA
This is kinda beside the point and experiences all vary and all of that, but my parents geothermal runs the heaters a fair bit in the winter and there's no way a reasonable generator would keep up. I think they're on their own 200A panel. A wood stove or alternative heating source of some kind seems like a requirement if you have geothermal, IMO.
The cooling on the geothermal is where their system shines. Their place is something like 5500 ft^3 on 3 levels and their summer electric bills are like $80/mo and their house has 0 shade and 1/2 of one entire side of the house is glass. It's still hard for me to wrap my mind around. Their winter bills are like $250-$400/mo (depending).