It seems like a very specific scenario you're concerned about, which doesn't necessarily force one to conclude we need to keep gas heating. I'm skeptical a 20 u

It seems like a very specific scenario you're concerned about, which doesn't necessarily force one to conclude we need to keep gas heating. I'm skeptical a 20 unit building would buy enough battery storage for long duration electric OR gas furnace heating during an outage. Probably not too difficult to do some napkin math on the cost of that system.