Full Breakdown
Record Solar Curtailment Threatens Europe’s Renewable Gains
5/13/2026, 8:56:40 PM
Rapid Solar Build-up Outpaces Grid Modernisation
Europe now hosts about 490 GW of solar capacity, surpassing gas, wind, nuclear and coal, with roughly 80 GW added in 2026—equivalent to six panels per second. The expansion has outstripped upgrades to aging transmission and distribution networks, leaving many regions unable to move electricity from generation sites to demand centres.
Scale of Waste, Price Distortions and Financial Impact
Negative wholesale prices have fallen to around –€500 /MWh in Germany and France during peak solar output, prompting operators to curtail or receive compensation. In Germany, curtailment costs are borne by the federal budget; Europe’s congestion-management expenses reached €9 billion in 2024. Reported waste includes 9.6 TWh in Germany (2025) and 72 TWh across Europe (2024). Analysts project up to 40 TWh of solar electricity—enough for Greater London for a year—will be wasted this summer, a 25 % rise over 2025. Curtailment reached roughly 16 % of Spain’s solar generation in Q1 and about 13 % in Germany, double the level a year earlier.
Official Policy Responses and Investment Plans
The European Commission estimates €1.2 trillion of grid investment will be needed by 2040. Germany plans incentives for solar-plus-battery projects, while Spain has fast-tracked battery deployment rules after the Iberian blackout in 2025. The German federal budget currently covers curtailment compensation to protect consumers.
Industry Criticism and Calls for Faster Action
SolarPower Europe warns that curtailment erodes investor confidence and urges faster permitting, stronger market signals, and expanded storage and demand-side flexibility. Analyst Michael Schrettle notes that reducing subsidies for negative-price hours could curb extreme price drops.
Conflicting Data and Reporting Gaps
Bloomberg cites German curtailment near 13 % in early 2026, while Brussels Signal reports 3.1 % for 2025, reflecting divergent measurement bases. Waste estimates also vary, with Bloomberg forecasting 40 TWh of lost solar output versus Brussels Signal’s 9.6 TWh for Germany and 72 TWh Europe-wide. Timelines for the €1.2 trillion grid plan remain unspecified.
Outlook: Grid Upgrades and Storage Integration
Planned grid upgrades, accelerated battery installations, and revised subsidy structures aim to reduce curtailment by the end of the decade, preserving solar’s contribution to Europe’s climate targets.
Verbatim Quotes
“Negative prices as well as curtailment are eroding returns.” — Axel Thiemann, CEO, Sonnedix BV
“The only way to get out of that dependence and the price spikes that we see is to have more electricity production, grid and flexibility in Europe,” — Anna Borg, CEO, Vattenfall AB
“Subsidies for negative hours will become less common, which could result in fewer extremely negative prices, said Michael Schrettle, an analyst at Volue.” — Michael Schrettle, Analyst, Volue
“Solar panels that cannot feed electricity into the grid do not offset a single ton of CO2.” — Leonhard Birnbaum, CEO, EON SE
