I really can not see them using Hydrogen to generate electricity, especially when they are using electricity to get the hydrogen in the first place, for the most part and the whole round trip is costly, energy wise. I can't even see them using H2 as a storage medium for excess power production short term until the evening duck bill hits, or the cloudy week rolls in. There are other ways to store energy that are much safer and cheaper.
Even then, power plants, shit leaks, if you ever worked at a gas fired plant, you smell it all over the place, it's the nature of the beast. Hydrogen is so FKN dangerous, ignites SO easy and you can't see the flames really when it burns, unlike NG where you can see the flame pretty easy.
Hydrogen needs special materials too, the molecule is so small it seeps out very easy AND it is very hard on steel / steel alloys. They get brittle and wear out much faster.
Anytime I had to work on the H2 system, even for minor stuff like replacing a gauge or something, id always take the IR gun with me to check for fires before I touched a thing. Nothing will wake you up in the morning faster than going to turn a lever to open up the cock for a pressure gauge and feeling the hair on your arm singe because there was a tiny leak and it ignited itself coming out that pinhole leak from the friction. YES the stuff really is that unstable.
Aaron
