My BX750MI-GR has saved my precious data on two occasions. Earlier this year, my seven year old, well used waffle iron shorted, popping loudly and sparking quite brightly in the process, probably because of all the gunk that had accumulated inside its less cleanable interior over the years. That not only made my breaker trip, but also blew the 16 amp main fuse. The UPS kicked in immediately, making a klick and a beep, which felt amazing. That was my first time ever.

As for the second time, see this post.
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[–] 2 points 1 day ago (1 child)

I don't have any cool stories like yours but last time we had a power outage I probably wouldn't have noticed if I didn't have HA set to notify me. That's mostly due to the house setup (solar inverter and batteries) but we do also have a couple of cheap, dumb UPS units which keep the ONT and one of the APs online, which for house layout reasons aren't on backup power otherwise.

That said the power where I am is a bit dirty - before we had the inverter put in we had some really nasty brownouts that I'm amazed didn't immediately kill anything. So it's entirely possible that the backup power has saved something from a premature end.

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