I‘m a bit exacarrating but one could rewrite the article as > I bought a UPS without reading the spec because i thought it‘s uninterruptible (it has a U in it.

I‘m a bit exacarrating but one could rewrite the article as > I bought a UPS without reading the spec because i thought it‘s uninterruptible (it has a U in it...) and then I never tested it‘s functionality over years. Now I think it‘s the suppliers fault that it did not work. There was another article that was a rant against a UPS supplier because it did not work anymore after a long time without checking. IMHO, a UPS is a device for _professionals_. It‘s not something one just buy and install-and-forget. It‘s something that needs regular maintenance and testing. It’s like a car. It’s not just driving, it’s also about checking the tires, dilling up gas, ... It might get advertised to you differently, but it‘s not that easy.