Question: 20 kw generator how many btu?
Answer: Example 2: A 20kW Generac model 6244 has full load Liquid Propane Vapor Consumption: 3.85 GAL/HR (Gallons per Hour). You can take that number and multiply 3.85 by the BTU per gallon (91,547 estimated) to get 352,456 BTU/HR (BTU per Hour).