Originally Posted by Davydd
I'm aware of all that but if you have 800ah of batteries it would imply a lot more energy use one or two battery Bs provide today. If not, why bother to have that much battery power for a weekend sojourn and why spend 80 hours charging when a few (like driving to your destination) will do? It's the logic that defies me. 10 amps per hour charging just makes no sense. At what size for those 10 amps? What would it take to equal the output of an Onan generator? Or a second alternator that I am finding rather efficient. And if you are parked waiting for a weekend trip shouldn't shore power be more logical?
Yes, it could give you staying power without driving if providing 240 amps. That would mean it would need to run constantly. Also staying in one place in a B is not logical either. That might make sense with a trailer.
You are putting your energy usage and camping pattern on everyone else. Sorry, it doesn't work that way. Not everyone does just a weekend, and I think the example given was just that, one example. 800ah of batteries, 600 usable would be ideal for a lot of folks, we would love to have it. Even off grid a moderate power user, like us, could go a week, even without solar. Remember not all of us want to move every day, we would not consider a change to a trailer until we got to over two weeks in a place, all the time. It is the way we like to travel, just as you want to be on the go all the time.
I agree you would charge to go most of the time on shore power, if you have it, but what if you have to store off site? I would see the fuel cell as near ideal for staying off grid, and not intended to run stuff that a generator would. It would fill the same purpose as solar, keeping you batteries up. Fuel cells have no problem running continuous from what I have heard.