France’s Nuclear Strength to Power Winter Exports

France’s nuclear power fleet is poised to deliver its strongest performance since 2017–18 this winter, positioning the country as a major electricity exporter across Europe.

Stronger Output, Lower Unavailability

EdF projects just 7.7GW of nuclear unavailability in Q4 2025 and Q1 2026—well below recent years. Even with late-stage maintenance adjustments, availability will remain significantly higher than the challenging winters of 2021–24.

Looking at last year’s trend, EdF may face around 11.1GW of unavailability this season. Still, this is a marked improvement, reflecting stronger fleet resilience and reduced disruption compared to the stress corrosion issues seen in prior years.

Nuclear Availability vs. Real Output

While availability is crucial, actual output depends on more than capacity alone. Some nuclear generation is reserved for system balancing, and market dynamics influence whether plants run at full capacity. In periods of low prices or high renewable generation, output may be curtailed.

Even so, EdF’s nuclear output could average 49.4GW this winter—up from 46.2GW last year. This matches levels seen in the stable winters of 2016–18, although still below the 2014–15 highs.

Strong Export Opportunities Ahead

Forward market prices indicate France will export more electricity this winter. Price spreads show a notable discount compared with last year, strengthening France’s competitive edge. With three Belgian nuclear plants closing and Europe’s growing demand for stable baseload supply, French exports are expected to play an increasingly important role.

Wind generation in neighboring countries will remain a key factor. Low-wind periods, like those experienced last winter, could heighten reliance on French exports. At the same time, surging solar capacity across Europe may limit midday export potential—yet overall, France looks set to benefit from higher cross-border demand.

What This Means for Businesses

The combination of a more reliable nuclear fleet, competitive pricing, and strong demand outlook underscores France’s critical role in Europe’s energy security this winter. For businesses, this means greater stability in electricity markets, but also evolving dynamics shaped by renewable growth and export patterns.

👉 Want to understand what these shifts mean for your energy strategy? Get in touch with our team at hello@gleg.co.uk to explore the opportunities and risks for your business.