AC Regenerator

PS Audio...that’s it.
By now you should find some nice deals on used P5/P10 units.
Don’t hesitate, when it comes to clean power PS Audio is the way to go. After I’ve tried the P5 "I couldn’t live" anymore without a regenerator.
Not to mention their customer service, it's one of the most effective and proactive I've encountered in this business. In my book that counts. A lot.

@souljacker     +1

Im not familiar with these newest models, I know the early ones did not offer anything i am asking about these $5000 units.
what is the claimed output distortion under continuous full load?
can they drive 5000 watts on a continuous basis without running hot?
what does it do during a momentary power glitch?
can you program all the operational parameters?

5,000 watts!  No they won't get hot, as they will shut down the instant you try to draw that much power.

PS Audio isn't the only game in town. Purepower makes very good regenerators with battery back-up.

I use a Purepower 1500+ which is excellent. The only concern is their customer service isn't the best, but the units are reliable. Had mine for about 6 years with no problems. 

I run all my equipment on it, even the amps with no loss of dynamics.