Yesterday while listening to the hum of the generator, I came up with some numbers I thought I'd share with you. My 6500kW generator can power just about the entire house (so long as I don't kick on the air conditioner). It runs on gasoline. I paid about $700 for it. Gasoline runs at roughly $4.00 per gallon here right now. The generator tank holds 7.2 gallons. According to the manual, it will run for 10 straight hours on a full tank of gas. That's $28.80 to fill her up, and the operating cost is $2.88 per hour, give or take variations in the fuel quality, height above sealevel, etc. As an interesting aside, according to the electric company's website, the average cost for 1 kilowatt hour is $0.50. So if my generator is producing 6 of those, am I in fact generating my own power cheaper than it's being delivered to me? Electricity is not my area of specialty. I know just enough about it not to touch the red wire.