Curtailed renewables in
GB and Ireland
Learn why curtailment costs are reducing, even as curtailment volumes increase
In the first six months of 2025, over 5.5TWh of clean energy was curtailed across Great Britain and Ireland, resulting in curtailment payments of £152m. This comprehensive report explores the scale of this issue through historical comparison, the underlying infrastructure constraints causing the problem, and the future outlook for renewable curtailment in the region.
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5.5TWh of renewables curtailed across GB and Ireland in H1 2025: what's causing renewables to be turned down?
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£152 million paid to GB wind generators to turn down: how will reducing costs affect revenue projections?
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Northern Scotland accounted for 86% of GB curtailments (4TWh) and 76% of curtailment costs: what factors make this area such an issue?
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Ireland curtailed 905GWh of power with no compensation under current market rules: why is this the case?
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NESO scenarios suggest that 15TWh of solar curtailment could occur annually by 2050 if grid constraints persist: how can this be solved?
Key themes for energy professionals
Understand how increased output affects prices and grid constraints.
Explore the implications of usable power vs overall installed capacity.
Learn how governments and system operators can address the challenges.
See the future landscape as net-zero targets create a more dynamic energy system.