I think it would be interesting to consider partial or hybrid solutions, which may vary by climate zone. I.e. a solar battery setup that can cover typical day/n

I think it would be interesting to consider partial or hybrid solutions, which may vary by climate zone. I.e. a solar battery setup that can cover typical day/night cycles with a tuned amount of excess, with some "survival" mode where you conserve battery charge for longer outages. You'd need some pre-planning to segregate different circuits to do partial transfers and/or some smart appliances which can operate in reduced power modes. In the survival mode, maintain a critical baseload of lighting and food storage, perhaps even with some freeze-proofing heating mode that does not hit regular comfort targets. Use high-load equipment only when there is excess solar input beyond what is needed for battery maintenance etc. You could also provide the right kind of exterior input to allow a portable generator to be added to the system in an emergency situation. This could support higher peak loads or recharge batteries when solar input is insufficient.