One reason I’ll never leave my home in the event of a social upheaval is because I live at my BOS. 22 years ago we had an ice storm that deposited 4" of ice, without exaggeration, on all surfaces. The place was quite literally a disaster area. We were w/o power for over 5 days and I decided that we were never going through that again. So I designed and built a solar photovoltaic electrical system with battery back up and an 8k gen back up for that.
22 years after the storm brings it to today and I decided it was time to change the batteries. They weigh 500# per and there are 2 of them. 22 years ago I had a friend with a backhoe put them into the room and I was able to slide and lift them into place. That wasn’t the case today when the old batteries had to come out and the new ones put into the battery box. I hired movers (very reasonable) and my neighbor came over with his tractor with forks on it. They should have a 20+ year life as well and I will simply never have the lifespan that the batteries have. So I’ll never do that again for as long as I live.
Before the PV system my idea was to revert to pre-REA (Rural Electrification Act) days and use kerosene. Back then we had plenty of power outages and we had no problems when they were <1 day long. It worked for the 5 day outage too but burning a hydrocarbon in a tight home for an extended period of time isn’t the best idea. We had condensation running down the walls. I retain the kerosene items just in case though. Kero’ burning “appliances” are about as low tech as one can get and they do work.