Look up brake specific fuel consumption. Keep in mind 1 hp/hr = 746 watt/hour.

2500 watt/hour = 3.335 hp/hr
Using .6# per horsepower hour for a place to start, at max output 3.335*.6#= 2.001#
A gallon of gas is 6# so 6/2 = 3 hours run time max output per gallon of gas.

So you can get 9 hours per tank max loading. As your load decreases your run time will increase.

I exercise my 3600 watt generator each fall for an hour running my house. I have a manual transfer switch so it is easy to do.

I keep 10 gallons of E0 on hand and change it out every 12-18 months by running it through my car. E0 stores longer than E10/15 stuff imho.






Last edited by Szumi; 08/03/19.