Our massive home is also quite efficient. 2200 kWh for a 4600 sq ft home that includes 2 central ACs, a sauna, a hot tub, and 2 EVs, is actually very spartan considering all the loads. GP states the average US home uses 1000 kWh, and the average US home is about half the size, and does not include any EV.
To fully cover the average home's 1000 kWh usage, you would need to be in my sunny Norcal climate, with my 70-panel 23.2 kw PV system that wouldn't fit on the average home's roof. You would also need a couple days worth of battery still. Even here, I have seen 7 consecutive days of rain certain El Nino years. Very few consecutive ones this winter, though. That PV system produces 31 MWh a year, also, where the average home only uses 12 MWh a year. So, what would you do with the excess 19 MWh, if you are off-grid ? Mine bitcoin ?
Off-grid might really work near the equator, where the days are approximately constant year round. Not so much at US latitudes.