The problem with wind or solar energy is not the production capacity itself but the storage. If and when there is enough wind and sunlight, respectively, you usually produce enough electricity, but every kilowatt-hour that is not consumed immediately is lost.

This is why you need to store large amounts of electricity, also to make sure that you have enough power once there is less wind or at night when the solar panels don’t produce energy due to the lack of sunlight.

This is what Spain tries to solve. But they appear to be on a very good track.