[solarguy]

I have always found the following factoid fascinating:

There is more hydrogen in a gallon of gasoline, than there is in a gallon of highly compressed hydrogen (like 800 bar, or 800 atmospheres, or 12,000 psi).

If you look at where the hydrogen -must- come from, it quickly becomes apparent that the so-called hydrogen economy will never take off.


If we eventually build enough wind and solar pv to make almost free electricity/hydrogen from electrolysis, it would still be more efficient to use batteries to store and use the electricity, rather than hydrogen.


It is just enormously difficult to store hydrogen at even decent energy densities.