Solar power fails every day from sunset to sunrise as well as during rain, hail, snow or dust storms. No matter how much land we smother in subsidised solar panels, they will still fail.
Wind power fails often and unpredictably, sometimes for days, especially in quiet cold winter weather. It also shuts down during cyclones, heavy winds or icy conditions. No matter how many hills we uglify with their subsidised roads, transmission lines and bird-slicers, they will still fail.