Renewable curtailment in Europe: 80 TWh wasted, who pays?
A data-driven dive into Europe's silent scandal: 80 TWh of green energy curtailed every year — and who actually pays the bill.
The definition
Curtailment is the forced reduction of renewable output by the TSO when the grid is saturated. The producer is compensated, but the energy is lost forever.
2025 numbers
- Germany: 18 TWh curtailed (North Sea offshore wind)
- Spain: 12 TWh (Andalusia + Extremadura solar)
- United Kingdom: 9 TWh (Scottish wind)
- France: 3.2 TWh (Hauts-de-France wind)
- EU+UK total: ~82 TWh
The hidden bill
Curtailment compensation is billed to consumers via transmission tariffs (TURPE in France, BNetzA Umlage in Germany). In 2025 the total cost crosses €3.8 billion.
Why it's getting worse
Europe adds 60 GW of renewables per year but only 12 GW of interconnections and 18 GW of storage. The production-to-grid ratio is structurally deteriorating.
The only way out: co-located demand
Every MW of data center installed within 80 km of a curtailment zone avoids 6–8 GWh/year of waste. Voltarione identifies these geographic pairs and triggers PPAs 15–30% below spot.
The Scottish case study
In 2025 Microsoft signed a 1.1 TWh/year PPA with ScottishPower on previously curtailed parks. Estimated saving: £42M/year. This is the archetype of the deal Voltarione automates.
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