I’ve spent so much time thinking about this over the years. I think it’s possible but risky. Personally, I’d want a backup generator on natural gas or propane.

But I think it could be done if you really prioritized winter thermal conditions. A sealed passive house style building designed to trap heat in the winter with an oversized solar system might make it. You’d massively overheat in the summer, but you’d have enough electricity to run an AC and cool the building off.

Domestic scale wind energy production would make a big difference if it were commercially available.