I have no clue what will happen in the next 10 years. Hydrogen Fuel Cells seem like a marginal solution - it can make sense in some situations. For example th

I have no clue what will happen in the next 10 years. Hydrogen Fuel Cells seem like a marginal solution - it can make sense in some situations. For example the military loves it because they can make electricity without the noise of a generator. Fuel Cells could make sense for some transportation problems, but they never will for other problems. H2 gas will always have problems with pressure, containment, embrittlement, and conversion/production costs. However, be on the lookout for other storage mediums, some of which are mentioned by other comments - Aluminum Hydride (Alane), Methane, Ammonia. In fact, look out for anything that can take excess electricity from renewables and store it. Aluminum Air batteries for instance.