Dad lost power Friday from 8:00am-3:00 PM. He chose the Ryobi 120v inverter to power essential circuits on the house instead of the other 5 generators he's got. They were too buried by duplicates of other stuff (how many electric tillers does one need?) to easily access.
It has 4x 40v 6Ah batteries = 960 Wh. Dad actually had a proper interlock installed in the breaker panel, so it's plug and play.
I'm critical of how much stuff he buys, but he did have an "extra" generator when I needed one during the week of no power.