It is good to see Hydrogen technology coming back. It was a hot item two years ago but dropped off the radar. Though water is the base fuel for a hydrogen vehicle and is readily available. I wonder the cost of running a vehicle using water as a base fuel (to produce Hydrogen) as apposed to battery/electic. It will be interesting to see a comparison.
Hydrogen generated from the wall socket is around four times less efficient. You are using wall electricity to produce two gasses (one is thrown away - oxygen) and additional energy is used to compress and store that extremely light gas. Going right from the wall socket to the battery is just too simple for some people. Please search around this forum for many discussions on this topic. Let us know what you conclude. It's just plain madness and no, hydrogen is not making a comeback. We are at a point in the research and development cycle where all the invested money from the governments around the world must start to demonstrate progress or risk cuts in funding. Don't worry, that funding is mostly going towards the electrification of the chassis so it’s very useful research and development. I support it completely and wish them all the luck in the world. They will not however be able to compete against the quick-charge BEV. I placed my bets and we need to wait about 5 years to see who was right.