Germany's Renewable Energy Crisis Deepens as Wind and Solar Fail for 200 Hours

Germany’s push for renewable energy has hit a major hurdle during periods of low wind and solar output. In 2025, a prolonged 'dark doldrums' event left wind and solar providing less than 10% of electricity demand for over 200 hours. Now, transmission operator 50Hertz is calling for urgent action to fill the gap. The issue came into sharp focus last year when Germany experienced an extended stretch of weak winds and minimal sunlight. During this time, renewables failed to meet even a tenth of the country’s electricity needs. While battery storage has improved—now lasting up to eight hours—it remains unable to cover such long gaps.

50Hertz, which oversees the grid in eastern Germany, Berlin, and Hamburg, is pushing for new gas-fired power plants to bridge the shortfall. CEO Stefan Kapferer, in his role since 2019, has warned that without intervention, renewables may only cover 20% of demand on similar days in the future.

Legislation to fast-track these plants is expected before the summer recess, with tenders for construction set to open later this year. However, past experience shows that planning and approvals for new power plants typically take at least four years. The situation highlights the limits of current energy storage solutions. With batteries unable to sustain long periods of low renewable output, gas plants are seen as a necessary stopgap. The government’s upcoming tender aims to speed up construction, but delays in approvals could still pose challenges.