I had the 1.3kva version of that series. It used to back up an AS400 at work. The batteries cost $100 to replace, but it was worth it. It could handle my home computer, monitor and laser printer, easy.
It made lots of noise, because the fans ran all the time. Even keeping it indoors, I had to open the case and blow out the dust a couple of times a year. The spec sheet warns about not putting it in a small room, and to keep it dry and clean.
It's made to be in an air-conditioned building, plugged in all the time. They are not efficient, but are not meant to be. They are made to back up 'mission critical' equipment, no matter what. The output is completely isolated from the input. That bank of capacitors keeps the power factor high under inductive loads.
You don't want to know what that beast of yours cost new. Only banks and gov't can afford (or really need) those things new.
It would be a real shame to part it out. A nursing home or small computer server farm would be the another kind of business that would use something that big. It would run the building liong enough to get a generator up. A place that does dialysis could benefit from something like that.
Maybe you could get a tax write-off if you donated it to a medical facility.