The grid which already exists because it was built before solar was interesting.
The grid which connects the Suncor Fort Hills mine in Alberta to Tijuana in Mexico.
Even if you want to expand that grid to the level of everyone getting their winter midnight electricity from the midsummer sun on the opposite side of the planet, the material element of the "electric highway" isn't what stops it, it has a low cost compared to the last-mile stuff that already exists.
The grid which connects the Suncor Fort Hills mine in Alberta to Tijuana in Mexico.
Even if you want to expand that grid to the level of everyone getting their winter midnight electricity from the midsummer sun on the opposite side of the planet, the material element of the "electric highway" isn't what stops it, it has a low cost compared to the last-mile stuff that already exists.