It's not quite the same, but put solar on the house, and added 10 kWh battery bank as part of it.
Let's just say the natural gas generator options are cheaper by half at the $5-10k range.
But was putting the solar on already, and we have a well, so HAVE to have power to have water. It felt dumb to have solar and then a gas generator. It probably WAS dumb. But here we are.
If I had to do over, I'd get a 2-way EV car charger and then my battery backup would be HUGE and I would still have a useful asset to drive around, as opposed to an expensive battery stuck to my wall doing nothing.