Batteries AND Generacs (and similar) *ARE* pricey.
Be wary of natural gas ONLY because in the event of a longer outage, the lines will lose pressure and you’ll have no gas.
*IF* you buy a portable generator, just make sure it’s a pure sine wave inverter generator. And buy big enough.
“make sure it’s a pure sine wave inverter generator”
I know what you’re referring to. What appliances suffer from “impure” AC.
When solar collector output is “sold” to the power company, it has to be converted to AC and at phase matching that of the power company’s feed. Is that convertor complicated and expensive? Oh, and also metered so they can pay you.