...During those times, we survive by cutting out all non essential power usage....We turn the house into a camp site... Prescut
Neighbour up the street went with a nice Honda gas genny and had an electrician put in a transfer switch. He can pretty much run whatever they need. He has a bunch of 10 gallon gas canisters stacked up against the house, though

I'm no camper, so I can pretty much run like normal when the power goes out. My whole-house battery backup will keep lights, fridge, NG boiler (for HW baseboard & indirect HW tank) etc. going for about 5 hrs., after which I fire up the old 6kW Onan diesel genny to recharge the batteries (about 12A) and run the house as well as the well pump and microwave etc. when needed. I have a 100L (25 USG) steel tank for diesel, which I put Stanadyne in, and cycle through it for my mini excavator and tractor. We were out for 84 hours during an ice srorm a few years ago and my next-door neighbours came over to have a shower (!)
We have fewer outages now as the hydro utility has been pretty proactive, cutting back trees near power lines and such, but "stuff happens" and you never know what might hit you.