[neoromantique]

>The problem is that grid scale power plants can't just turn on when the sun isn't shining

They can, though? Batteries can offset the start-up times, otherwise gas plants can start up within minutes and nuclear can ramp up within days

[HWR_14]

"Days" is too long when you need power at night. Coal and gas combined cycle plants take too long just like nuclear.

Turbines could work. But that's not the majority of plants.