If anyone is interested, I collected data on the temp rise vs time with both the 15 gal mega pot and the 9 gal bayou classic. I can post it. The temperature rise is very impressive. Now, if anyone is thinking of BIAB with this setup, I can tell you that if you want to do a no sparge process, the 9 gal bayou classic kettle is undersized. It's just not possible if you want a reasonable gravity (e.g., 1.050+) without suffering low efficiencies and having to top up prior to boil. You will want to consider a 60 qt although now the diameter is growing. Bottom line: this Avantco 3500w induction burner is great for batch sparging but probably not optimum for BIAB no sparging. FWIW.