Outages in the Valley are usually short, but the houses that ride them out comfortably planned ahead. The electrical side is where that planning lives.
A proper transfer switch or interlock with a generator inlet lets a portable generator feed selected circuits safely, with no risk of backfeeding the utility line.
Wiring and transfer equipment for automatic standby units, coordinated with your gas contractor and permitted through your city.
Electrical scope for battery backup: critical loads panel, wiring, and coordination with the system installer.
I run the load numbers so the system matches what you actually need to keep on, which is usually less than the brochure sells.
I'll give you a real number, in writing.