We need to replace one of our older APC rack-mount UPSes (nothing fancy, just a 3KVA), a simple battery replacement isn't enough anymore it seems. As we're looking into alternatives (others have recommended Eaton), I also wondered whether Li-ion based UPS systems - exist. Turns out they do, Eaton apparently has some, APC possibly and then there is this N1C technologies company that I have never heard of.
So the big question - does anyone here have Li-ion UPS systems in use, and if so, what experience do you have with it? Any brand you recommend?