I would rather spend a few thousand more for a natural gas generator, it will run indefinitely as long as you have natural gas.
If the whole grid goes down, your gas likely won't be there.
If you add solar, then you could indefinitely run in most circumstances.
You could swap out the NG generator for a diesel one with a day tank and then you don’t have to worry about NG service :)
A 30kwH battery wall is going to last 6-12 hours at most anyways.
I can’t recall NG service disruptions on a large scale in my state, and I’m 37.
Point being you could target your outage range based on what you want to prep for at a fairly low cost (assuming $50/kWh).
Add on a solar system to any of these and you'd have indefinite power without a reliance on surrounding infrastructure.
For my home, 30kWh would give me ~24hr of power.
Even if you want a fossil fuel generator, you could have an auto switch to battery for the short outages so you don't have to go crank on the generator.
Cost like 5k and 2K install. Really hard to beat that in the near term with battery.
No it doesn’t do the demand shift part of a battery, but it’s pretty clearly better as an emergency solution, at least for my needs.
However, it's still a lot more hassle to set this up compared to a battery pack that "just works".
It's going to be a shock for a lot of people, specially in techno-optimistic communities as HN.