17JUN

France-Germany May power spread doubles record

4 min read

10:21UTC

France May-26 baseload settled at €21.80/MWh on 28 April against Germany at €77.55/MWh, a €55.75 spread that more than doubles Kpler's January 2025 record on the same calendar product.

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Key takeaway

The spread closes when Flamanville-3 starts its overhaul in September; until then interconnector capacity caps any earlier compression.

France May-26 baseload power settled at €21.80/MWh on Tuesday 28 April, against Germany May-26 baseload at €77.55/MWh⁠¹. The €55.75/MWh spread is more than double Kpler's January 2025 record of €27.50 on the same calendar product, the highest forward gap between the two grids that the market has recorded.

EDF's March nuclear output ran at the highest level since 2019 and is still suppressing French forward Continental power into Q2. Germany's May-26 baseload is clearing on a gas-dominated merit order anchored to TTF at around €44/MWh; France's is clearing on a fleet of pressurised water reactors running near nameplate. The Italy-France day-ahead spread hit €153/MWh on 26 April on the same Continental nuclear-surplus dynamic at the cash level. Forward markets have absorbed the May-26 print over a week of trading without significant compression.

France-Germany cross-border physical interconnector capacity runs at roughly 4.8 GW under day-ahead market coupling, the structural bottleneck the headline does not show. Even at full nominal allocation, the cable cannot transfer enough French nuclear surplus to clear into German prices without merit-order shifts in Germany itself. The arbitrage cannot fully clear inside the physical network, so the financial spread persists. For French-sited industrial offtakers, that translates into roughly €56,000 of monthly hedge advantage per MW of load against southern-Germany peers, with knock-on effects on cross-border manufacturing competitiveness in chemicals and metals through Q2-Q3.

The window has a defined close. Flamanville-3, EDF's newest reactor, enters its twelve-month overhaul in September 2026, removing roughly 1.6 GW of French nuclear at the heating-season cusp. Forward strips that lean on French nuclear past Q3 are pricing through the September calendar, so the spread compression should land before the heating-season buyers do. RTE and CRE auction signals on cross-border interconnector allocation through May become the test of whether regulatory remedy is in scope before the physical fleet shift forces it.

Deep Analysis

In plain English

Wholesale electricity for May 2026 costs around €22 per megawatt-hour in France and €78 in Germany. France has cheap power because its nuclear plants are running flat-out, producing far more electricity than France needs. Germany relies heavily on gas-fired power plants; at €44/MWh TTF, that pushes German clearing prices well above €70/MWh. The cable connections between the two countries can't carry enough cheap French electricity east to bring German prices down. This gap is good news for French factories, which pay far less for electricity than their German competitors. It closes in September, when France's newest nuclear reactor goes into a planned overhaul for a year, and France will have less electricity to export.

What could happen next?

Consequence
German-sited chemicals and metals producers face monthly hedge-cost disadvantages of tens of millions of euros versus French peers through Q2-Q3 2026, amplifying industrial competitiveness pressure ahead of autumn EU energy policy review.
Risk
Forward sellers of French power for the period after September 2026 are pricing a 1.6 GW nuclear buffer that Flamanville-3's overhaul removes; if autumn demand is cold, French forward prices may reprice sharply upward as the overhaul start nears.

Source Landscape

This story draws on neutral-leaning sources

Primary parallel: In the winter of 2005-06, France and Germany ran a sustained forward spread of €25-35/MWh for three consecutive months after a cold snap triggered French nuclear load-following restrictions. Cross-border capacity on the France-Germany NordPool coupling cleared at 4.8 GW per day; physical limits held the price gap open for three months.

The mechanism is identical: nuclear surplus in France sets a low clearing price that the physical grid cannot export at sufficient scale to compress German prices. The 2025-26 episode is more extreme in magnitude but follows the same structural constraint.

Counter-parallel: The 2022 European power crisis produced France-Germany spreads that briefly inverted; France paying more than Germany; because the nuclear fleet's corrosion outages suppressed French output below demand.

That period (summer-autumn 2022) reversed the 2005-06 pattern: export capacity that normally flows west-to-east was insufficient in either direction when French supply fell below French demand. The Flamanville overhaul from September 2026 introduces a partial version of that suppression scenario for the winter 2026-27 period.

French-sited industrial offtakers see a hedge advantage of approximately €56,000 per MW of monthly load against German peers on May-26 forwards. For a German chemicals plant running 200 MW of continuous load, the monthly cost disadvantage versus a French-sited peer runs to roughly €11.2 million per month in May 2026 forward pricing; a figure that compounds through Q2 and Q3 if the spread holds.

The Flamanville-3 overhaul commences September 2026, removing roughly 1.6 GW of French nuclear output at the start of the heating season. Forward strips that lean on French nuclear surplus past Q3 are pricing a buffer the September calendar removes. The RTE (Reseau de Transport d'Electricite) allocation auction for cross-border capacity through May will test whether regulatory remedy can narrow the spread before the overhaul deadline.

Consensus view: S&P Global Commodity Insights' European power team has previously documented that France-Germany cross-border capacity runs at roughly 4.8 GW physical day-ahead allocation under NordPool coupling, well below the financial spread implied by €55.75/MWh.

Even at full nominal utilisation, the physical interconnector cannot transfer enough French nuclear surplus to shift German clearing prices without a parallel merit-order shift in Germany's gas and coal stack. Wood Mackenzie's European power model puts the implicit arbitrage value stranded inside French generation at approximately €2.2 billion per month at current spreads; value that accrues to EDF's balance sheet but cannot be realised by German offtakers.

Counter-view: Ember's European electricity data team notes that Germany's accelerated renewable build; wind and solar covered 61% of German demand in Q1 2026; is itself dampening demand for French nuclear imports on high-generation days. The spread is at its most extreme on low-wind, high-load days; on windy days the gap compresses to below €20. A prolonged high-wind period in May could narrow the forward spread before Flamanville's September closure without any interconnector upgrade.

Key tension: Whether the €55.75 spread is a structural arbitrage the physical grid cannot clear, or a weather-dependent phenomenon that compresses with renewables output; the two interpretations carry opposite hedging implications for German industrial offtakers buying forward power for Q3.

Sources:Prestige Business Solutions

Mentions:EDF →Kpler →Flamanville-3 →France →Germany →TTF →Wood Mackenzie →Italy →Ember →RTE (Reseau de Transport d'Electricite) →

First Reported In

Update #6 · REMIT II live; storage instrument absent

Prestige Business Solutions· 29 Apr 2026

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Causes and effects

Caused by

EDF March output highest since 2019

EDF's record March 2026 nuclear output (highest since 2019) is the proximate driver of the France-Germany May-26 power spread doubling the prior record.

Occurred 15 Apr 2026

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Italy-France day-ahead spread hits €153/MWh

Italy-France day-ahead spread hitting EUR 153/MWh on 26 April is part of the same Continental nuclear surplus dynamic driving the France-Germany May-26 forward spread.

Occurred 26 Apr 2026

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This Event

France-Germany May power spread doubles record

EDF's nuclear surplus is suppressing French forward power below half of German clearing prices, and the cables between the two grids cannot move enough French electricity east to close the gap.

Led to

FR-DE spread to €37 at higher floors

FR-DE spread compressed from EUR 55.75 on 28 April (ID:2885) to EUR 37.47 on 7 May as both markets rose in absolute terms

Occurred 7 May 2026

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France swings 88% as FR-DE spread halves

The EUR 55.75 spread on 28 April was the prior extreme that has since compressed, making the 12 May EUR 23.68 reading a substantial reversal.

Occurred 12 May 2026

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Flamanville-3 commercial, 1.6 GW overhaul in September

France-Germany power spread reached EUR 55.75 on 28 April (ID:2885) on French nuclear surplus; Flamanville-3 commercial operation sustains this cushion through Q2 before the September overhaul reverses it.

Occurred 5 May 2026

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FR-DE power spread hits a weekly high

The 28 April EUR 55.75 record is the structural ceiling; the 25 May EUR 51.18 is the cycle's second-highest print.

Occurred 25 May 2026

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