>Refrigeration
It's called a root cellar, and it's much more efficient at preserving things than solar panels and a busted compressor fridge. If you can afford to waste power running a refrigerator, you should honestly look into just building a freezer room ahead of time to keep shit cold/act as insulation.
That'll be great once SHTF, but up until that point it is highly illegal to do that (at least in my state).