Green hydrogen specialist Lhyfe has constructed a green hydrogen plant for Deutsche Bahn in Tübingen, which Lhyfe will also operate, with an annual production capacity of up to 30...
I've never jumped on the hydrogen bandwagon. I know it's technically renewable, but I feel hydrogen is a stop-gap resource.
Imho hydrogen on trains is only a good idea, for long distance trains running on not electrified track. Hydrogen is more energy dense and easier to refill then a battery so a good idea for say US freight trains.
However Germany has all its mainlines electrified. In this case all three towns have electrified main stations. Battery trains are a good solution for that relativly short sections of unelectrified track, as long as charging can be done in stations. This would be the case here, as in most of Europe to be honest.