Negative day-ahead power prices nearly vanished in Germany and Britain in October

What changed in October

October brought big wind in both countries but hardly any subzero pricing. Germany slipped below zero for only two hours, while Britain saw five - sharp pullbacks from the same month last year. That mirrors October 2022, when elevated gas costs erased negative hours entirely in both markets.

Higher gas contracts lifted overall power costs, which helps explain why prices did not flip negative even as renewables surged. In Germany, the average day-ahead price climbed to about €171 per megawatt-hour from €82 a year ago, the priciest month since late 2022. Wind output set a daily record on October 23, and monthly wind generation ran about 10% above the 5-year average. According to NESO, Britain's wind output averaged about 11.9 gigawatts in October, around 7% higher than a year ago.

Why negative prints got scarce

Europe's grid is getting better at handling windy, sunny bursts. Large users have grown more nimble, dialing demand up when power is abundant and down when it tightens. Wind and solar operators are also curbing output when prices are too low.

Extra demand from batteries, pumped storage and electrolysers helped mop up excess supply when renewables spiked, according to Volue Data & Forecasting. The firm estimates roughly 6 gigawatts of flexible load in Germany during subzero price periods, and approximately 4 to 6 gigawatts in Britain. According to Silvia Messa of Volue, who leads the firm's analytical work covering continental Europe and Japan, "Growing flexible demand and a higher general price level in 2026 are consistent with the German and British drop."

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Policy shifts and market plumbing

Subsidy design is part of the story. Germany tightened policy last year, so most new renewable plants generally forfeit support from the first negative quarter-hour, nudging operators to cut back or route power into storage. By the end of 2025, 46.6 gigawatts of German wind capacity - about 60% of the fleet - continued to receive support that was not subject to the negative-price hourly rule, according to energy research institute FfE.

Developers and investors have reason to like the new pattern. Fewer negative hours reduce the hit to project revenues. Sabrina Kernbichler, who leads European power at Energy Aspects Ltd., said, "The increased price responsiveness of wind generation, especially when it comes to offshore wind versus last year, has meant fewer negative prices as well as limited depth of negative prices," and added that the pattern is likely to persist into the winter.

What this means for your portfolio

In plain English: steadier prices during renewable surges support project cash flows, while stronger average wholesale prices lift revenue when output is high. Add in growing flexible demand and curtailment tools, and the market's peaks and valleys are getting softer for generators - and more predictable for investors watching power-linked equities, funds and infrastructure assets.

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