30 qt kettle for 1 gallon batch

I am currently using a 30qt (7.5 gal) kettle to make 1 gal batches. Is there any reason why should not do this? Can a kettle be too big?

Anyone?

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I've found that smaller batches in a larger kettle boil off more quickly, there's probably some thermo-physics-engineer who can explain why. As long as you adjust for your evaporation rate, there shouldn't be a problem.

I prefer a smaller pot for my 1-gallon batches because I do BIAB and I can fit the smaller pot in my over to help it hold temperature for the full hour. In a larger pot, it wouldn't fit in my oven, and the huge headspace would (I'm sure) result in a major rapid drop in temperature during mashing.

If you're just talking about the boil, then I don't see any reason why you couldn't use the larger pot.

Thanks! I was worried about the evaporation, assuming that the larger surface area would result in higher evaporation. I just did my 2nd biab this way. This time, I poured 4 cups of clean water over the steeping bag when I pulled it out to get all the flavors out of it, assuming that I would have room due to evap, but ended up with too much (started with 1.25 gal as directed). I am now not worried about the evaporation rate, but wanted to make sure I was not somehow losing flavor.