What is the boil off rate on the G30? Kim September 20, 2021 12:16 Updated This is around 7%/hour which is in line with commercial breweries. For 220v units, the boil-off is 2 L/hour. For 120v units, the boil-off is 0.4 US Gal/hour. Related articles What are the calculations that are used in the Recipe Creator? What efficiencies can I expect from the G30? Which Bluetooth class is the G30 Controller? Instructions - G30 All Grain Brewing System What are the minimum and maximum grain bills I can brew with on the G30?