Orkney are in the early stages of moving to hydrogen from electrolysis for the ferries. To replace diesel and because they've already reached 100% of power from

Orkney are in the early stages of moving to hydrogen from electrolysis for the ferries. To replace diesel and because they've already reached 100% of power from renewables so they're actively looking for other fossil uses they can move to renewable. Germany has some similar projects creating hydrogen as storage for renewables, and replacing some diesel trains with hydrogen. I'm less convinced it will replace petrol, but there is definitely a case for it replacing many uses of diesel.