29MAY

FR-DE day-ahead spread doubles to EUR 46.58

4 min read

09:05UTC

German day-ahead cleared EUR 106.35/MWh on Thursday 21 May against French nuclear-baseload clearing of EUR 59.77, a EUR 46.58/MWh spread that doubled the EUR 23.68 print on 12 May; the German carbon stack now prices through the cross-border basis.

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Key takeaway

EUR 75/t EUA is the binding constraint on the FR-DE day-ahead spread; gas-price moves are secondary.

EPEX SPOT cleared France-Germany day-ahead at EUR 46.58/MWh for Thursday 21 May delivery, almost double the EUR 23.68 clear nine sessions earlier on 12 May . Germany cleared EUR 106.35/MWh, France cleared EUR 59.77/MWh, with Spain at EUR 59.00 and Italy at EUR 100.55 forming a sharp continental cluster split¹. The spread reversal sits at the seventh trading session after 12 May, and Netherlands at EUR 101.69 confirms the high-price cluster runs with Germany rather than against it.

Mechanism is the German carbon stack pricing through the cross-border basis. At EUR 47 TTF and EUR 75/t EUA, the German CCGT marginal cost sits near EUR 129/MWh; French day-ahead leans on EDF's 350-370 TWh full-year nuclear guidance and the 29.3 TWh April output that priced May-26 baseload at EUR 21.80/MWh on 28 April. Flamanville-3 declared commercial on 5 May sustains the surplus, although September's one-year overhaul will strip 1.6 GW at heating-season start. The 7 May FR-DE compression to EUR 37.47 sat on a high-price German clear at EUR 136.03; 21 May reverses that with Germany 22% lower than 7 May but France 39% lower still, widening the basis from the bottom rather than the top.

For desks long the FR-DE spread on cool-weather German solar overshoot, 21 May was the payout: Germany cleared 123 negative-price hours in April at a mean of -EUR 36/MWh², and intraday solar volatility into a carbon-stacked thermal fleet now prices the FR-DE basis as a function of German thermal dispatch rather than French nuclear surplus alone. The forward read flips in September: Flamanville's one-year overhaul strips 1.6 GW at heating-season start, reversing the French nuclear surplus that has suppressed Continental clearing since Q1, so summer extension of the FR-DE long now needs a Hormuz-driven TTF break to keep the German carbon stack alive into autumn.

Deep Analysis

In plain English

Germany and France both buy and sell electricity on the same wholesale market, but their costs of generating power are very different right now. Germany relies heavily on gas-fired power plants, which are expensive because gas prices are high and because the EU charges companies for the carbon pollution they produce. France gets most of its electricity from nuclear reactors, which produce power very cheaply. On 21 May, German electricity cost EUR 106 per megawatt-hour, while French electricity cost only EUR 60. That EUR 46 gap between neighbouring countries is a result of two very different national energy mixes being priced in the same market.

Deep Analysis

Root Causes

Germany's CCGT marginal cost at EUR 47 TTF and EUR 75/t EUA sits near EUR 129/MWh; any hour in which demand cannot be met by renewables or nuclear imports clears at or above that level. France's nuclear baseload, at 350-370 TWh full-year guidance from EDF with Flamanville-3 declared commercial on 5 May , supplies baseload at a short-run marginal cost close to zero on a cleared-energy basis.

The interconnector capacity between France and Germany - roughly 3,000-4,000 MW on the southern routes - cannot clear the full surplus, so the spread persists even when French nuclear is abundant.

The September 2026 Flamanville-3 overhaul reverses the French supply position: 1.6 GW comes offline at heating-season start, reducing EDF's annual output toward the lower end of its 350 TWh guidance and removing the surplus that has suppressed Continental clearing since Q1. Any desk extending a long FR-DE spread position into September is trading against a structural calendar reversal, not with it.

Source Landscape

This story draws on neutral-leaning sources

Primary parallel: The EUR 55.75/MWh FR-DE forward spread recorded on 28 April 2026 (ID:2885) was cited by Kpler at the time as more than double the January 2025 record of EUR 27.50 for the same calendar product.

The 21 May EUR 46.58 day-ahead spread approaches but does not match that extreme: it is a second data point establishing that EUR 40-50+ day-ahead FR-DE is no longer an outlier but a recurring feature of the 2026 market structure at EUR 47-50 TTF and EUR 75/t EUA. No equivalent sustained FR-DE spread above EUR 40 appears in the five years before 2026 in day-ahead data.

Counter-parallel: The 7 May FR-DE compression to EUR 37.47 (ID:3144) showed that the spread can narrow sharply when German absolute clearing rises and French absolute clearing rises faster. On 7 May Germany cleared EUR 136.03 and France EUR 98.56; on 21 May Germany cleared EUR 106.35 and France EUR 59.77.

The 21 May spread of EUR 46.58 is wider than 7 May's EUR 37.47 not because Germany cleared higher but because France cleared 39% lower - driven by the Flamanville-3 commercial declaration (ID:3390) sustaining French nuclear surplus into May.

The spread trade payout from 12 May (EUR 23.68) to 21 May (EUR 46.58) is EUR 22.90/MWh per MWh of spread exposure across nine trading sessions - a 97% move. For desks holding EFA (European Financial Arrangements) or EFP (exchange for physical) positions on the FR-DE basis, the week ending 21 May was the payout.

Forward extension now requires two conditions to coexist: TTF holding above EUR 43 (keeping CCGT marginal cost above EUR 120/MWh) and French nuclear surplus persisting through summer without the September overhaul pulling the floor.

At EUR 47 TTF with the EUR 50 ceiling intact from the diplomatic-premium analysis (event-01), German clearing is likely to stay in the EUR 100-120/MWh range through summer. The September Flamanville outage (1.6 GW) is the spread-reversal catalyst; a desk long FR-DE for summer extension should mark the September overhaul date as the exit trigger.

Consensus view: Kpler's power-market team assessed the EUR 46.58/MWh FR-DE spread on 21 May as driven almost entirely by the inversion of the German CCGT merit order at EUR 75/t EUA rather than by French nuclear surplus alone: EDF's 29.3 TWh April output suppresses French clearing, but the spread widening from EUR 23.68 to EUR 46.58 over nine sessions was driven by Germany clearing higher, not France clearing lower.

The ENTSO-E (European Network of Transmission System Operators for Electricity) flow data shows NTC (net transfer capacity) utilisation on the FR-DE interconnectors running at saturation on high-spread days.

Counter-view: CRE (Commission de Regulation de l'Energie), the French energy regulator, has flagged that the sustained FR-DE spread at EUR 40+ creates regulatory pressure to accelerate the cross-zonal capacity reform ACER's Electricity Network Tariff Repository (launched 20 May) was designed to enable.

CRE's view is that interconnector congestion rather than the carbon stack is the primary spread driver: if FR-DE NTC were unconstrained, French nuclear surplus would clear into Germany commercially and suppress the spread below EUR 30.

Key tension: Whether the September 2026 Flamanville-3 one-year overhaul , which strips 1.6 GW from EDF's fleet at heating-season start, reverses the FR-DE spread direction by compressing French surplus - or whether German CCGT off-merit conditions persist and the spread narrows from the German end as carbon policy shifts.

Sources:euenergy.live

Mentions:ENTSOG →Germany →France →Italy →Spain →Netherlands →EDF →Flamanville-3 →CCGT →ACER →Kpler →TTF →EUA →Electricity Network Tariff Repository →EPEX SPOT →

First Reported In

Update #11 · Germany cannot inject at this price

euenergy.live· 22 May 2026

Read original →

Causes and effects

Caused by

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FR-DE spread doubling to EUR 46.58 reverses the compression to EUR 23.68 covered in ID:3221, confirming the German carbon stack as the structural driver of the spread.

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Occurred 22 May 2026

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FR-DE spread to EUR 37 at higher floors

FR-DE power spread reversal coincides with TTF returning to the EUR 43-47 band; gas-set carbon stack on German clearing.

Occurred 6 May 2026

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This Event

FR-DE day-ahead spread doubles to EUR 46.58

Long the FR-DE spread on cool-weather German solar overshoot has just paid out and needs fresh evidence to extend.

Led to

FR-DE power spread hits a weekly high

The FR-DE spread widened further to EUR 51.18 on 25 May from the EUR 46.58 recorded on 21 May.

Occurred 25 May 2026

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Different Perspectives

Amsterdam-Rotterdam gas trading desks

TTF failing to sustain EUR 47+ with 51 mcm/day of Norwegian capacity offline confirms EUR 50 as a diplomatic ceiling; the curve is a Troll-restart long, and EBN's EUR 233 million mandate budget cap is a known limit on price-insensitive prompt buying.

ARERA

Italy's energy regulator is running mandatory storage injection that carries the EU aggregate trajectory alongside CRE and EBN, while Italian industrial consumers at Panigaglia face a simultaneously low-utilisation terminal and a EUR 2/MWh delivered-cost basis above TTF. The mandate funds security of supply at the expense of Italian competitiveness.

Shell

As a long-term Russian LNG contract holder, Shell faces a replacement procurement problem concentrated in Q3-Q4 2026 ahead of the 1 January 2027 double cliff; with terminal booking lead times running weeks, the real deadline is late November 2026 and no replacement supply has been publicly named.

CRE

France's 100% mandatory booking order funds injection regardless of the inverted strip, providing the EU aggregate cover that Germany's abolished levy cannot; the CRE order is renewed annually, making it a political risk rather than a structural guarantee. That dependency exposes the EU injection trajectory to French electoral cycles.

Bundesnetzagentur

Germany's regulator holds the early-warning gas stage active with no statutory instrument to compel commercial injection, and Berlin confirmed on 20 May it will introduce no summer incentive scheme; Germany is the EU's only major unincentivised storage market after the levy lapsed on 1 January 2026. The mandate gap is carried by three other member states.

European Commission

The Commission relaxed the mandatory fill target from 90% to 80% and published an ETS benchmark revision saving industry EUR 4 billion, choosing industrial competitiveness over both climate and storage ambition at the moment physical margins are tightest. Both decisions reduce policy pressure at the exact week the trajectory margin narrowed to 45 GWh/day.