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Do those have an inverter built in? If not, at $600/kWh very pricy compared to what this guy used at $190/kWh for batteries, or $360/kWh including the inverter:

https://www.amazon.com/dp/B08G81TKC6?ie=UTF8&th=1&linkCode=s...

Also, $190/kWh is so cheap. Its hard to believe how fast costs are falling for energy storage.

If is he talking power bank, then big ones, usually called power stations, have inverters. But they can’t be used as UPS since they cut power when switching sources.

Hm fridge sure, but oven? 256Wh is going to power an electric oven for like, 5 minutes. Doesn't seem useful.

My experience is that power banks and UPSes fail more often than my power.

I keep a couple charged, but with nothing plugged in. I sometimes plug things in before a major storm, planned outage, or after an unplanned one.

This is funny to me because mine just died unceremoniously during a snowstorm and it made me realize there should really be a testing cycle built in.