We’ll probably see a worldwide transmission grid based on DC voltages upwards of 1 MV (maybe even 10x that level) sooner than that. Practically doable today with a link across the Bering Strait.

It would provide a similarly good solution. Lots of empty land in North Africa near enough to the equator not to suffer from seasonal effects.

Day-night usage can also be balanced to some extent using smart grids. You don’t need to run your washing machine RIGHT NOW often enough, but it can be set to start during times of low grid load…