An easy fix for that would be to put a surge protector between the UPSs. (Joke) ------------ I bought three UPSs, all them used independently; but I had to st

An easy fix for that would be to put a surge protector between the UPSs. (Joke) ------------ I bought three UPSs, all them used independently; but I had to stop using all of them. They all had a capacitor whine that was driving me crazy.