Re: So the fuel cell will never need charging..?
> I suspect it is their marketing dept that has claimed this, and not their engineers (I hope ;-) )
Perhaps they intend that braking will initially part-charge the capacitors and then the fuel cell finishes the job while the car is stationary, waiting at traffic lights, or whatever. Then when you're ready to go there is a full charge available.
I think this would work often enough that you could live with it.