100% renewable targets will require power storage to manage flows on the net
Electrolysers utilise these intermittent power flows to produce H2 gas from water
H2 gas can be stored in large quantities underground and transported via existing gas pipelines
H2 vehicles recharge faster and are more durable than battery powered transport
Growing H2 demand in industrial processes will reduce costs and increase supply

The German railway company Eisenbahn-Bundesamt (EBA) as of December 2017 will deploy the iLint FC powered line from  Buxtehude–Bremervörde–BremerhavenCuxhaven. As the trains will emit only water (vapour) due to the conversion of hydrogen as a byproduct from the nearby chemical industry railways seem to have evolved the the new stean trains 4.0 from the coal based version since the 19 th century. The EHA is contributing to the BulkH2Rail project

Phot0: George Stephenson first steam locomotive of 1814)