[Myrddin]

Hydrogen still needs to be generated from another energy source. It can be separated from natural gas or by electrolysis of water. Either way, it's just a store of transformed energy into a difficult to store form. The clean "burn" of hydrogen is desirable in the isolation of a space vehicle. Solar cells make sense in the same context. The extra expense can be justified in that special use case. It doesn't make a lick of sense for the terrestrial commuter. Diesel/gasoline/liquid propane make the best fuels for vehicles. Great energy density that is rapidly replenished in the process of traveling.

[Red Badger]

But da Erf! We gots ta save da Erf!...............

[Tell It Right]

I was interested in buying a hydrogen electrolyzer to produce hydrogen for long term storage for my home solar system. But at best they lose 50% of power round trip from power to create gas to later generating electricity from a hydrogen fuel cell.

Meanwhile battery costs keep going down and I get about 95% round trip efficiency from that power storage.