Same here. No big deal. How would it deal with a one-week power outage? No, it won't.
I've got a power generator and plenty of gasoline (stored in the tanks of several cars). One time there was a storm here that knocked out power in our neighborhood, and the utility took over a week to restore power. Good luck getting by on battery power. With my generator, I can easily run my fridge, washer and dryer as well as everything else.
For short outages, it could be a good solution for a house to keep some lights on and the fridge cold. I would rather invest in a generator powered by LP or NG to run heat, lights, sump pumps, refrigerators, etc. for a hour or a week, it wouldn’t matter.
Any business with mission crucial equipment already has a UPS system in place tied to a backup generator for longer outages.