Well, this I didn't expect!

Well, this I didn't expect!  When I went out to my barn office this morning, I was surprised to find that my iMac Pro was powered down.  After I powered it back up, I noticed that the Ubiqiti WiFi node in my office had also powered down over night, though it came back up on its own.  Then I discovered that my little Mac Server (a Mac Mini) also had powered down and come back up – as had all my networking gear.  It looked exactly as though I'd had a power outage – but I have a (really nice) UPS running all of it.  WTF?

My UPS isn't actually in my office – it's just outside my office, in the storage area part of the second floor of my barn.  That part of my barn is unheated.  Looking the the UPS logs, I discovered an event around 3:30 am this morning: temperature too low, at 9°F.  The thing shut down because it got too cold!  This is a new experience for me – all the temperature problems I remember seeing in electronics was because it was too hot, not too cold.

So now I have a new project: to move my UPS down into the heated part of my barn.  That's just 2 feet below where it is right now. :)  This will mostly involve drilling a couple of holes (for the input and output power) and building a shelf for the UPS, high on the wall of my workshop.  Not a project I was expecting!!