Balanced power and regenerated power

Thanks Paul,

I have never heard of any balanced power unit that does not use a transformer. I believe that the units I have been looking at (furman, core power) use large transformers. Am I missing something? What other forms of balanced power exist? Also, would any of these units benefit a power plant? BTW I have already decided to get a P 10 am just shopping around for a decent deal. With the P 20 on the horizon perhaps killer deals on a P 10 could be not far off?

Thanks in advance

Brent