Renewables Achilles Heel
For renewable power sources, like Solar and Wind, the Utility has to provide an alternate source of power for when the 'renewable' isn't available. That generally means coal. In Germany, it certainly did. The shutdown mandate for Nuclear in Germany means in practice that they talk about using solar and wind (Germany isn't a good solar power candidate. Too much mountainous land, and too much cloud cover.) but, they are using much more coal. Germany has coal deposits, but no oil.