[ZeroGravitas]

Solar and wind can be trivially turned down when not required. They are much, much better at it than traditional sources.

So easy that one of the actual problems we face is that by default grids will generally prefer to turn off the clean renewables and let the difficult to modulate fossil fuels run.

This is why negative prices are a good thing, financially incentivizing fossil producers to plan for flexibility and fining them when they fail to do so.