It's much easier to do that with standby power. Having a generator or shore power for back up easily keeps them in a happy place. We skipped over the solar battery back up as it's not even close to economical and life Cycles are expected to end around the 10 year mark. (There was a cycle count we were quoted, can't remember what it was for the genrac vs Tesla) were out of power a lot, and extended outages are normal, not frequent, but enough we've been on generator power for a week already. One to 3 days is normal. Hate being the dead end of the line. Even 8 hours of back up was more then the cost of the solar array. Just not worth it for us. Generator is easier till battery tech catches up.
Oh yeah, if you're buying an off the shelf Generac or Tesla system, and spec'ing it in to run your whole place just as if it's a normal day, it's stupid expensive. I went DIY, and only for the necessities. Cost the same as a Kubota LowBoy diesel, but "fuel" falls from the sky. If it needs batteries again in 10 years, so be it.