I am talking about the kind of fuel cells which can be used by wind and solar to store energy and distributed economically feasible.

We are not even close to that. If you know of anything, by all means, please let me know as the group I am part of would invest in it in a heart beat.

I don't know of anything like that either. Small fuel cells rely on expensive precious metal catalysts and large ones have too much capacity to be a good match for the distributed generation sector.

A technology that is commercially available but too expensive at present for large scale adoption, like fuel cells, is more mature than a technology that hasn't been demonstrated even in a cost-is-no-object context. That's why it's strange to hear fuel cells described as even further out than fusion power.