So far we have been extremely lucky. In 30 years we have only had a couple of unplanned outages that lasted more than an hour We did have an outage that lasted four hours, 10 years ago. But our grid here is extremely reliable. Of course when the S hits the F, the electric grid may stay down. In that case I can’t imagine finding fuel to run the generator for more than a day or two either, Unless you keep a large amount on hand. Here it is illegal for residential people to keep more than 1 gallon of gas in a gas can at the residence. Now you can buy a 5 gallon gas can anywhere. Go figure… But I don’t think it’s illegal if you keep the gas tank on your generator full. I don’t think there’s a limit on that size. If your generator has a 200 gallon gas tank and it’s only 12 hp, it is gonna run for a long time.