Technically the BrewZilla 100L would be able to get away with the NEMA 14-30. Given that at 220v it would be 6313watts we are just under the 30amp limit at 220v. If that is an option would you prefer the NEMA 14-30 over the NEMA 14-50?
We have seen a large number of Nano-brewerys really love using the BrewZilla 100L unit as it works out to be a really great value product with not much competition in this size range.
I know it's nice to have the power cable unplug from the boiler but we find with brewers using these portable breweries one issue we see a bit is when the cable is not plugged in all the way it can arc quite a bit and cause damage to either the socket or the cable. For appliances that are not moving it's generally not an issue but for some appliances that are on castor wheels like the BrewZilla 100L
on the Dolly wheels
we sometimes find having the plug on the boiler a bit dicey for these high amp current demand. So this would be our main apprehension to do this.