I don't know if I'd describe those methods as "great", but using wind and solar for electrolysis and technologies like the one described in the article for energy storage form a sort of ecosystem of offsetting deficiencies.
Solar and wind have a problem: the energy they collect and harness isn't available on demand. The energy is "free" (more accurately the energy is already present in the environment from the sun), but it needs to be stored to be most useful because the sun doesn't always shine and the wind doesn't always blow.
Electrolysis has a problem: physics. It takes more energy to split a water molecule than you can get out of using the resulting hydrogen and oxygen.
Storing the energy from an inefficient conversion is great, but it probably doesn't scale to an industrial level without a huge infrastructure investment and equipment footprint, much less scale to mass consumer use. That is not a particularly sexy problem to solve, but even in a niche industry use, it could certainly have a lot of value.
What internet sez>>>
80%
ยท Very roughly, a new electrolysis plant today delivers energy efficiency of around 80%. That is, the energy value of the hydrogen produced is about 80% of the electricity used to split the water molecule. Steam reforming is around 65% efficient.
True, there will eventually be giant solar farms for that infrastructure. Chances are they will be solar hydrocarbon rather than solar hydrogen, easier to move and store. I think they will end up being built in the third world and look like crap, but they will work.