Solution devised... A solution for my frozen UPS problem, that is. Immediately below my UPS's current location is the 12 foot high ceiling in the barn's “garage” (where I keep my tractor, ATV, and some other equipment). There's no wall anywhere near there. I remembered that I had one of these ceiling storage kits left over from another project. After a little investigation, I figured out that this would work very nicely to make a little “under the ceiling” shelf of sorts high above my “garage” floor, well out of the way and safe from anything stupid I might do with the tractor. Installing that shouldn't be very difficult, other than having to do the work at the top of a tall ladder. Once that shelf is in place, then all I need is a roughly 4" diameter hole in the ceiling (and floor above) to route the power input and output cables through. I think the biggest challenge will be simply putting the UPS up there – the thing is a monster; weighs about 60 or 70 pounds. I have to do some thinking about how to (safely) hoist that thing up there.
So now I have yet another project, this one with a bit of urgency as we have some cold weather in the forecast!