[defrost]

There is a case for portable storage, sure.

Hydrogen at scale is going to look more like a means to export sunlight energy from equatorial climes (Australia, Sahel, etc) to Europe, the northern US, Canada as required.

Efficiencies dictate the most likely roll out is large central generation of electricity and dispersal via the existing electrical grid system.

In a similar view individual per apartment solar panels make little sense, panels should be built into entire buildings .. across roofs and across any required parking structures, etc.