What a electric grid systems to keep it stable is what is known as spinning inertia,But Germany has enough generation capacity, without nuclear and coal. Shed loads of wind farms, especially in the North Sea. Too bad they're not connected to those areas where the power is needed. In fact the North Sea wind farms aren't generating at all, they're even consuming power in order not to sieze up. So when the last coal and nuclear powered stations close in the not too distant future all will be well. Or so gov't sources and the media keep telling us.
the conventional power plants had this due to having rotating machines,
Wind turbines and solar panel have no spinning inertia and if you tie them together
electrically they are unstable, this is just one of the disadvantages of using wind turbines,
This explains it
Video and report explain the historical role of inertia in maintaining a reliable power system—and how this role is changing as the grid evolves.