But what the parent is saying is true. Production from wind and solar is random and doesn't work without corresponding guaranteed (controllable) capacity, unle

But what the parent is saying is true. Production from wind and solar is random and doesn't work without corresponding guaranteed (controllable) capacity, unless you are willing to accept so-called brown-outs and black-outs. (Increasing installed capacity of these random generators is not a solution since it leads to situations where the production exceeds demand ... which puts very different demands on the infrastructure.)