Building loads of independent power plants works for non-renewables because the availability of different power plants within the grid is uncorrelated. That isn

Building loads of independent power plants works for non-renewables because the availability of different power plants within the grid is uncorrelated. That isn't true for wind or solar. When the weather's unsuitable for wind or solar generation that means that all power plants in the region stop working, and because weather patterns can affect quite large geographic areas that can take out a huge swathe of power plants.