But they do generate zero power at night.

And people use less energy at night. Yes, they do need heating/cooling and a few other things at night, but the peak is during the day and in the evening.

This argument is almost closed at this point, with PV + batteries being quite price competitive. We're no longer in 2018.

Solution? Send large mirrors into space so it never stops shining.

https://www.reflectorbital.com/