> selling sunlight

Sounds like an eco disaster to me.

Some things only happen when it's dark...

I'm amazed I almost never read about a much more viable alternative: inter-continental power transmission cables.

There are a few projects: UK buying electricity from Morocco, Singapore buying electricity from Australia. Both implemented using undersea power transmission cables.

If this could be implemented on a global scale, it would also massively reduce the requirements of storage for transient solar and wind power.