Why Germany Keeps Shutting Off Solar and Wind Farms Amid Negative Prices
- Europe's renewable energy sector faces a growing economic paradox as a boom in clean power generation collides with market rules that penalize operators during periods of oversupply.
- While commercial renewable curtailment—where operators voluntarily reduce output or shut down because generating electricity is no longer economically worthwhile—declined across most of Europe during the first half of...
- Other European nations experienced sharply different trajectories during the first half of 2026 due to varying market rules and weather patterns.
Europe’s renewable energy sector faces a growing economic paradox as a boom in clean power generation collides with market rules that penalize operators during periods of oversupply. According to Eurostat data cited by energy market intelligence provider Montel, renewable sources generated 45.5% of the European Union’s total electricity during the first quarter of 2026, marking an increase from 42.7% during the same period a year earlier. Wind power supplied 44.9% of that renewable mix, hydropower accounted for 28%, and solar power contributed 17.3%.
Germany Increases Solar Farm Curtailment Amid Subsidy Changes
While commercial renewable curtailment—where operators voluntarily reduce output or shut down because generating electricity is no longer economically worthwhile—declined across most of Europe during the first half of 2026, Germany moved in the opposite direction. Montel reported that German commercial curtailment climbed 20% from 1,216 gigawatt-hours to 1,463 gigawatt-hours during the first six months of the year. This increase occurred even though the country recorded 299 hours of negative wholesale electricity prices, down 23% from 389 hours during the corresponding period in 2025.
Analysts attribute the shift to Germany’s Solar Peak Act, known locally as the Solarspitzengesetz, which took effect in February 2025. Under the legislation, newly commissioned renewable energy installations lose their guaranteed support payments immediately whenever wholesale electricity prices fall below zero. Newly commissioned renewable assets lose support payments immediately whenever wholesale electricity prices turn negative, while continuing to receive full remuneration when prices remain at exactly zero,
explained report author Jean-Paul Harreman.
This regulatory design creates a sharp financial disincentive for operators to keep feeding power into a saturated grid at a loss. Furthermore, Germany’s transition to quarter-hourly day-ahead electricity auctions has increased the frequency of short intervals where prices dip below zero, compounding the pressure on plant operators. Montel forecasts that German commercial green-energy curtailment could reach a record 2 terawatt-hours for the full year of 2026, representing a roughly 10% increase over 2025 levels.
Contrasting Policies in France and Finland
Other European nations experienced sharply different trajectories during the first half of 2026 due to varying market rules and weather patterns. In France, commercial curtailment dropped 32% despite a 14% increase in negative-price hours driven by rising nuclear and solar output. French subsidy structures encouraged generators to maintain production rather than switch off, while a late-June heat wave increased electricity demand for cooling and absorbed midday generation surpluses. Finland registered the most dramatic shift among the countries analyzed, with commercial curtailment plunging 89% as negative-price hours fell from 337 down to 40. According to Montel’s findings, the primary driver was a Nordic hydrological deficit that pushed wholesale prices higher. Norwegian snowpack dropped near a 20-year low and regional water reservoirs remained well below normal levels, eliminating the oversupply conditions that typically cause negative pricing. Additional declines in commercial curtailment were also recorded in the Netherlands, Belgium, Switzerland, and Poland.
