Yet Germany’s move to a power system largely reliant on weather-dependent renewables is quickly running up against limits—issues that all countries exchanging conventional fuels for wind and solar will eventually face. What happens when the sun doesn’t shine and the wind doesn’t blow for hours or even days at a time? And what about the short, dark, cold days of midwinter when renewables of Germany’s power demand?
And it’s not only shortages that are problematic but also surpluses: Stormy days can be so windy that the power flows from wind parks on- and offshore overwhelm the power grid, even triggering its collapse. These electricity tsunamis can threaten the stability of neighboring countries’ energy systems, a brickbat the Poles and Czechs wield. Moreover, when there’s excess power in the grid, prices can go negative, forcing grid operators to pay customers to take the electricity,
