> If we string solar plants all around the planet, the sunny side can always supply the night side.

Does this include stringing them across the Pacific Ocean, which covers thirty percent of the Earth's surface?

Awfully optimistic when we can't even get one 200-mile HV line greenlit after 10 years.

https://en.wikipedia.org/wiki/Quebec_–_New_England_Transmiss...

Building cables across the ocean raises much more demanding engineering problems but much less demanding political problems than building them across multiple states. You don't have to please a bunch of different regional governments and land owners when you're building across the ocean. If you have a government that can dictate national projects like in China you can build long cables over land even faster, but that political alternative also comes with its own problems (to put it mildly).

That would require world peace

And lossless energy transmission.

And several large floating sea cities full of engineers to maintain it all.

Naa, we use gigantic mirrows in space to bring light to the night side.