The function of the hydrogen economy in New Zealand, Australia and Japan.

Hydrogen will mostly power ships, trains and trucks, and stationary power uses.
Hydrogen will power some cars and vans but it will cost double or more than electricity, electric vehicles will always cost less to charge at home.
Hydrogen creates a price floor in the electricity market. Say goodbye to cheap off-peak electricity.
Hydrogen can be shipped between countries that cannot be linked with power lines to create a global energy market, with global pricing.

New Zealand Japan Hydrogen agreement.
https://www.beehive.govt.nz/release/new-zealand-signs-hydrogen-agreement-japan