alt Hacker NewsI fully agree on the snark, but if anyone seriously considers backup from grid...
Get an islanding-capable inverter separating your internal power setup from grid, connect it with battery systems - you can control battery charging and have "microgrid UPS" then. Combine it with solar power feeding as second feed into inverter. Scale battery and solar panels as needed. If you have third input, can add three-phase genset (I recommend looking for propane fueled one if you don't want to care about fuel going bad)
I have this pretty much and generating way too much power for our needs which is great. And that includes car charging for light but significant use. I export a lot during peak hours from the battery as there is a lot of surplus.
But I was snarking on "provider". There are 100s of providers where I live but one grid and you can't use two concurrently.
My backup in the past has been a local library for internet and laptop power and everything else can wait.