I'm calling the supplier on this question, but I would assume it lasts longer than regular gas? I'm going to try to get the biggest tank they have (If they will let me).
I went with the dual generator as well for the same reason. I was willing to trade a bit of power for the easy and clean propane. The loss of power does not effect my ability to run the whole house, less the AC units of course. I have a couple of portables that the generator can handle. I always have gas in storage as well that I rotate out to the vehicles every year or so. After the hurricane I decided to up my storage of both Gas and Propane even tho I didn't need the generator. Just to be sure I am covered.I have a dual-fuel generator at home. My gasoline I preserve with PRI-G, and rotate every couple of years. But my propane tanks are my go-to in an emergency.
They produce less power than gas, but propane is idiot proof. I feel a lot safer storing propane in our garage (gasoline stays out in the shed).
Gasoline for vehicles. Propane for power and cooking.
I keep mine in the basement on a shelf.So maybe I should move them somewhere else a little safer. Right now I have stored in my secure spot but about 6' from breaker box and in the basement. I dont want to put them in the shed though for the fact that thieves are everywhere in my neighborhood. Any ideas?