I have three reversables but have been thinking about swapping out for the Ballast King. I think they draw about 20A max per. Right now each pump runs at 15A so slight upgrades may be needed. It would be less upgrade cost and power wise than adding more pumps by only increasing overall load by 15A max. That is at startup and the draw should drop once started. The Ballast King fills 50% faster which will bring your time to <10 minutes. You won't need to use the drain plug or make any more holes.