30 days? No problem. When our school year finished up this year, I brewed 7x 5 gallon batches in 5 days… Had a lot of empty fermenters and some catching up to do :o
I brewed 50 gallons in a 6 week period from late February to early April, but this time of year it is just too freakin’ hot to brew outside. My Independence Day brew session about killed me.
I think I could with a bit more warning, but I only have 15 gallons of keg space. Working on building my bottle collection back up, and fermenters only hold 6 gallons. I don’t know if you could convince me to try and bottle the last 9 gallons…
In the dead of winter I will occasionally brew 2 10-gallon batches back to back on one day using a three keggle system. Start to finish it would be about 8 to 9 hours, if I had everything synchronized and the styles and processes were meshed well. A counter flow chiller was the key. I haven’t tried it since going single vessel BIAB earlier this year…