Do you really think they would have 12 chargers will be running constantly all together? I'd imagine you can set a queue system up, 3 at once or whatever - you plug your car in, and while you go off to pay/shop when one car is finished it will start charging yours, by the time you get back to your car yours would be almost done. Added to the fact that gas stations typically have the chargers all together because the infrastructure mandates it, with electric chargers not so - you don't need a huge tank installed underground - small convenience stores could have 3 chargers outside whereas for them to have gas pumps would be a non starter.

Now I know America has lost that forward thinking intelligence that made it great but surely you could sort something out? (Not hydrogen, I agree Hydrogen sucks)