I finally got around to using my 9000w keggle today for a 10 gal batch of Copper Ale. I have a 5500w element then a 3500w to maintain the boil. It took 14 min to get 6.5 gal from 51F to 168F sparge temp then ~16 min for 12 gal to get back up to boil. The 3500 maintained a perfect boil, i ended up with a hair over 10 gallons total after an hour boil. What an upgrade from a turkey burner! I'm hooked on electric.