I drove 1800 miles in a Hydrogen Car

It's best not to think of Hydrogen as an energy source as it is not very abundant on earth in its own state. Hydrogen shines when you think of it as an energy storage medium. Currently we are using very expensive battery storage for offloading excess wind and solar power as well as in electric vehicles and home backup. Batteries wear down and loose voltage over time even if you don't use them.  Hydrogen from water electrolysis on the other hand is much cheaper than building a battery and can store the energy indefinitely.