'Major discovery' from MIT primed to unleash solar revolution

[Black Aeronaut]

For home use, metal-hydride alloys will suffice. There, you don't have to worry so much over the weight or the size. Don't forget that we live in the
same world where people routinely keep 200-gallon fuel tanks in their homes for heating oil. I don't think a metal-hydride tank or two is going to be much
worse than that.

For automobiles though... I have interesting thoughts. Stay with me here.

Remember that electric Mini Cooper? Speedy little shit that got 80 mpg going
cross-country? Yeah, efficient as all hell. Probably still has it's original gas tank too, since it's total range is 932 miles. Here's the deal.
We use a standard liquid H2 tank system, appropriately nerfed for safety purposes, that feeds a bank of fuel cells. Yes, we take a hit in range, but is it
that bad of a trade off? As efficient as the PML Mini-Cooper is, a hit like that will bring it's range down to about half as much as the standard
ICE-and-generator system. Which is about the same we have for the regular gas guzzlers (and even the gas sippers) we use now.

So, tell me now what the big problem is.