I've been sitting on an old APC SUA750XL UPS for awhile I got from work. Sad story, it was used with some Lexmark laser jet printers which it directly says not to do! Seems to be alright though, I put a new battery in it and all seems well.

I was just running apcupsd on my main server (6700k, ASUS H170, 32GB DDR4 3200, 1660Ti, 4x12TB HDD, 2x4TB HDD, 500GB NVME). It was running on a BX850M which while a more capable unit in a wattage context, has less Ah. The UPS is also running the core of the network (UCG Max, Max POE 16, modems, etc).

The whole system only uses like 120w while the server is idle. But it obviously would be a lot less if the server itself wasn't running.

I've had a Rockpi 4C+ sitting around doing nothing for awhile. I think I had it running octoprint previous with my Prusa but that has since been replaced with an HP mini-pc and a Proxmox install hosting a bunch of other stuff.

So I set it up with ubuntu server, Focal I think? It was on the wiki for the board itself. Got NUT running, USB to the UPS, as well as an Adguard Home docker to set higher in the DHCP order than the main server.

Installed the client on my main server, set a script to shut it down after a few minutes after power failure. Tiered shutdown? Seems like the best way.

Though I have wanted to move the main server over from Debian 12 to Proxmox 9. I'm messing with it on two other machines and I'm quite a fan. Then I could incorporate some HA (with a stupid quarum server or w/e, ugh). I

I was then able to put my HP mini-pc on the BX850M and rinse repeat there. It wasn't on any backup previously 😬