Uses for a giant transformer?

Probably not applicable to ebikes so much, but this seems like the right place to get some direction.

I acquired this massive transformer from a new (but sitting on a shelf for years) 5KV battery backup supply that was being thrown out. It probably weighs close to 30lbs. My electronics knowledge is pretty limited, is there something this could be useful for? I don't think I'll ever use this myself, where would you go to find someone who would want something like this?

Pictures:
https://i.imgur.com/axyQyMF.jpg
https://i.imgur.com/MdTz9Bt.jpg

Cant see the pics, but depending on the ratio of windings you might be able to use it for a spot welder, or a Jacobs ladder.

Crap sorry, just made the images public.

I seen the photos thats high quality piece worth a lot of $

I would think you could get $200 for it without knowing much. It looks like its worth about $800 new

Its not anything to do with PV.

Its just a transformer, from a UPS.

I just seen the photos and edited my post , its a big beasty transformer.

Tip - People living off grid could be interested , they use battery storage.