alt Hacker NewsOne of my favorite bits of hardware is a UPS. I’ve played with several over the years, from fancy server-grade rack-mount APC stuff to inexpensive edge stuff. Without exception, downtime is increased by use of a UPS. I used to plug a server with redundant PSUs into the UPS and the wall so it could ride out UPS glitches.
Even today, a UPS that turns itself back on after power goes out long enough to drain the battery and is then restored is somewhat exotic. Amusingly, even the new UniFi UPSes, which are clearly meant to be shoved in a closet somewhere, supposedly turn off and stay off when the battery drains according to forum posts. There are no official docs, of course.
Sounds like crappy UPSes. Even the cheap old used eBay Eaton UPSes I have in my homelab have a setting for "Auto restart" and the factory default setting is "enabled".
But even rackmount UPSes are more of an "edge" sort of solution. A data center UPS takes up at least a room.