I went solar for backup, very pleased so far. Not meant to keep operating as normal, just allow judicious use of critical items during an outage. Top priorities were a CPAP machine at night, fridge, freezer, and well pump. Also added both home offices, all the internet/wifi stuff, TV in the living room, and all the lights. Stove, water heater, and clothes dryer are all electric, and will just have to do without those for the duration of the outage. Just having running water next time will be huge. Also quite a comfort to have backup power for the well during fire season.
Had the house rewired recently, and took the opportunity to have critical loads moved to a sub panel and a 50a generator transfer switch and input added. Each individual circuit can be switched between grid and generator as desired, without impacting any other circuit. Plug in a generator or the solar system, as I choose.
Solar harvests power all the time, so I wanted the ability to leave some circuits grid connected, while powering some circuits with solar, to make use of that harvested power. The grid might be down right now as I'm typing for all I know, and it might be hours before I notice. This is why I didn't do a whole-house transfer switch. Building a solar power system that would run the all-electric house as normal would have required a 20x(or more!) bigger system. I'm not averse to adding one of those before-the-meter transfer switches, so that if needed, I could plug in a large generator and run the whole house. That'd basically just be for running the water heater, and I'd look real hard at a heat pump water heater that the current solar power system would run before I went that direction.
Final backup is a 2kw Honda inverter genny and lots of appropriately stored + rotated gasoline.
Oh, and I flip generators on the side - have 8 of them stacked up in the shop at the moment. I could put any of those into service as well, instead of selling them. I'd rather sell them.