Do wind and solar curtail at negative electricity prices? Incentives and evidence across two decades of German renewable support schemes

TEXT START: In many power systems, wind and solar generation increasingly often exceeds electricity demand.

The Dissection

This is an empirical autopsy of Germany’s renewable-support machinery. It shows that policy has created generators whose private incentives conflict with wholesale prices and grid stability: wind often has an incentive to stop at deeply negative prices but only partly does so; solar is largely insulated by feed-in tariffs. Subsidized output therefore continues when its market value is negative.

The Core Fallacy

The paper treats price responsiveness as the decisive repair. That can reduce subsidy waste and operational stress, but it cannot remove the underlying mismatch between intermittent production and demand. Correct incentives may simply produce more curtailment, lower utilization, and higher balancing costs.

Relative to the Discontinuity Thesis, the deeper error is assuming that better market design can preserve the expansion trajectory. This is lag management, not systemic recovery. It does not restore productive participation, reverse P1–P3, or make intermittent generation equivalent to controllable power.

Hidden Assumptions

• Support schemes can be redesigned without destroying investment incentives.
• Generators will reliably respond once exposed to prices.
• Additional wind and solar capacity remains systemically valuable despite rising negative-price hours.
• Storage, transmission, flexible demand, and grid management can absorb the resulting volatility.
• Better price signals are sufficient, rather than merely one requirement among many.
• An electricity-market correction can be treated as a solution to a broader structural crisis.

Social Function

Primary classification: partial truth and transition management, with a layer of elite self-exoneration.

The evidence is real; this is not pure copium. But the paper converts a collision between subsidized capacity, physical intermittency, and inherited institutions into a technocratic incentive problem. That framing lets policymakers and capital owners describe systemic strain as a correctable design defect.

The Verdict

The paper is a strong narrow diagnosis: Germany’s support architecture pays renewable generators to ignore negative prices, inflating subsidies and making the grid harder to operate. Its remedy is inadequate as a systemic strategy. Price-responsive renewables will either curtail more or expose their low-value hours; neither restores dispatchability or reverses the collapse of productive participation. The paper documents a subsidy regime in hospice and mistakes better triage for recovery.