Quote:
Originally Posted by codeman671
I would not count on 3-4 weeks out of 400 gallons. A 24kw Generac burns 2.5 gallons at 50% power and almost 4 gallons at 100%, which equates to 6-7 days of run time. My twin Kohler 20kw each run about the same consumption rate and tied to a 1000-gallon tank (800-850 actual) after a week I am scraping bottom.
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Longest run was about 3 days, 24 hours per day. I used less than 5% of the tank. So I'm comfortable with 3 to 4 weeks for my situation it most likely would last much longer in a similar situation. In this case, it was wintertime, cold, with heat (oil) running, 2 refrigerators, maybe half a dozen lights. If it were summer with AC running, it would not last so long. I'd keep a closer eye on it. I was surprised, in fact as I was monitoring I thought the gage on the tank was stuck. I had done the paper calculations also and expected it to use more. YMMV