> The demand is already there. It's the supply that is the issue.

Somehow many societies are able to power a huge amount of transportation via electrified rail and bus systems. That's an existing solution that requires zero new technology.

And of course there are EVs for places that somehow can't figure out how to do electrified mass transit.

Wrong. Storage is the issue. In my town in switzerland we produce a surplus of solar energy, so much that we can't even sell it back to the electricity company.

But the storage is too limited. The surplus during the summer doesn't translate to the winter months so other types of electricity generation is still required.

GP means source as in for transportation.