I just built my house, and it has a lot of solar panels. We planned to generate enough to offset heating with electric heat pumps and charging two cars.

What I did was set up a sub-panel with a generator interlock. For now, we're going to use a portable generator in extended outages. Once batteries are a bit cheaper, the batteries will run the sub-panel.

What about heat in a power outage? That's why we have a wood stove. You never know when an ordinary fossil fuel furnace will fail!