If you go to the trouble of generating hydrogen, why not generate ammonia? NH3
Ammonia has about one third of the energy density of hydrocarbons, which is extremely good.
Or why not Methan?
Sabatier won a Nobel prize in chemistry to transform hydrogen and carbon dioxide to methane using a catalyst.
Both are way easier to handle and to transport than hydrogen.
Put up some windmills or solar cells close to water, come with a truck every few weeks to pickup the ammonia/methan.
No grid needed, no need to retrofit infrastructure to hydrogen.
Of course, another conversion step reduces effency, but you save elsewhere.