Quote:
Originally Posted by Piotrsko
I have a brother thing sitting in my garage: 200 lb commercial data farm UPS that uses 4 series lead batteries, as much as you could add for capacity. Down side is it's 240v output that doesn't split that I know of. It is on my list for investigation, someday.......
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A 240/120 isolation transformer gives you a neutral. Rated for at least 2X ups kva
As long as most of your loads are 240v .. or you have about the same loads on each 120v leg .. works fine. I started having trouble at 25% imbalance (past tense, Eaton 9170 ups at work) the system was replaced with a tripwire system designed for 120/240