Thing is, if it happens here, it'll most likely be after hurricane and I'm 80 miles inland (low odds. Although
I got lucky during that real bad year we had several hurricanes with power out for 24 hrs or less, my friends just a few miles away were out for weeks and if that happens, the generator is coming on, not matter the cost to run it and all this will likely be moot.
If it's a cooler weather outage fine or if gas is hard to get and that's possible it could be handy.
Best bet a single solar panel for extremes and not much more than the setup I have and a diesel generator with fuel that lasts, about 50 gallons of it. At least I hear diesel lasts a long time.