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France swings 88% as FR-DE spread halves

4 min read

16:16UTC

France day-ahead power averaged €37.00/MWh on Monday 11 May, then surged 88% to €69.63/MWh on Tuesday 12 May, while Germany cleared €93.31/MWh down 22% on the day, compressing the FR-DE spread to €23.68 from €37.47 on 7 May.

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Key takeaway

Convergence between France and Germany hides growing dispersion at the edges of the bloc.

France day-ahead power averaged €37.00/MWh on Monday 11 May, then cleared €69.63/MWh on Tuesday 12 May, an 88% intraday move⁠¹. Germany settled at €93.31/MWh the same day, down 22% on the day. The FR-DE spread compressed to €23.68 from €37.47 on 7 May, reversing much of the doubling from €55.75 on 28 April. ENTSO-E, the European transmission system operator network, published the day-ahead data via euenergy.live.

The pattern reflects a high-renewable Monday compressing French and German prices in parallel, then thermal-set prices returning on Tuesday as wind output fell back. EDF's nuclear fleet provided the baseload that suppressed French Monday clearing to €37; once thermal generation re-entered the merit order, the €32.63 gap to Tuesday opened in a single session. Forward positions taken on the €98 snapshot of 7 May now need to price daily swings above €30 rather than a static level. Forward desks now trade the €30+ dispersion rather than the headline level.

Hungary cleared €123.23/MWh on 12 May, €54 above Spain's same-day €69.23, the largest single-market premium in the briefing series. ACER named Hungary and Slovakia among seven national regulatory authorities in its 6 May TurkStream-entry derogation opinions; the European Commission has not ruled, and the 5 August deadline is the live decision window. Hungary's €54 premium compounds the political case for the derogation while the parallel CJEU challenge runs without a ruling date.

France-Germany has compressed; the edges, Hungary above and Spain below, have widened. Cross-border interconnector revenue for Coreso participants softens as the headline French-German arbitrage narrows, while forward positions on the €37+ snapshot of 7 May face mark-to-market pressure. Flamanville-3's September overhaul, removing approximately 1.6 GW of EPR nuclear baseload, will amplify both level and variance into Q4, compressing the buffer that kept France below Germany through most of Q2.

Deep Analysis

In plain English

Electricity prices in Europe are set every day in auctions, and the price in each country varies depending on how much electricity is being generated from wind, solar, and nuclear power versus gas-fired plants. On Monday 11 May, France had cheap electricity at €37 per megawatt-hour because its nuclear plants were running fully and renewable output was high. On Tuesday, wind dropped and gas plants had to pick up the slack at much higher cost, sending the price to €70. Germany had the opposite pattern: high on Monday, lower on Tuesday. Hungary paid €123 per megawatt-hour, the most expensive in this briefing series, because it lacks cheap connections to France or Spain's renewables and relies more on gas piped in from Russia via a pipeline called TurkStream.

Deep Analysis

Root Causes

European day-ahead power prices have become structurally bimodal since the post-2022 transition. High-renewable sessions (strong wind and solar output, typically Monday-Tuesday) drive continental clearing toward €0-40 in France and €1-10 in Germany.

On thermal-set sessions, gas peakers at €47 TTF set the marginal cost at €80-140. The €30+ intraday variance traders now price across France and Germany is a direct product of renewable penetration plus a high gas-price floor, not a transient anomaly.

Hungary's structural €54 premium over Spain reflects both limited cross-border interconnection and TurkStream dependency. Hungary has no direct connection to cheap French nuclear or Spanish solar via high-capacity interconnectors; its grid balances on gas, priced at Continental spot rates without the Norwegian pipeline-gas discount that Western European markets access.

The ACER TurkStream derogation opinions of 6 May and the Commission's 5 August deadline mean Hungary's gas supply security remains in regulatory limbo through the summer pricing window.

What could happen next?

Risk
Flamanville-3's September 2026 overhaul removes 1.6 GW of French baseload exactly when the storage deficit (currently tracking to 73%) tightens the winter gas supply picture; the two events compound in Q4 2026.
Medium term · 0.85
Consequence
Hungary's EUR 54 premium over Spain reinforces the economic case for TurkStream derogations; the Commission's 5 August ruling will move Hungarian forward contract pricing in either direction.
Short term · 0.79
Opportunity
The narrowing FR-DE spread reduces cross-border arbitrage revenue but improves price convergence for consumers in both markets; if Flamanville-3's overhaul is delayed, the compression could persist through Q3.
Short term · 0.62

Source Landscape

This story draws on neutral-leaning sources

Primary parallel: France cleared at EUR -43.73/MWh on 26 April 2026 with Germany clearing €1.49/MWh on strong wind output, the opposite extreme of the 12 May print. The span from EUR -43 to €70 in under three weeks on the French day-ahead illustrates the volatility pattern that interconnector operators now trade.

The pattern of violent swings across a two-to-three-week window has precedent in 2023 Q1, when French nuclear availability recovered from the corrosion crisis and repeatedly cleared €100+ below German and Italian prices.

Counter-parallel: In 2021, FR-DE spread compression indicated supply tightness on the gas side setting German thermal; France's nuclear deficit was the anomaly, not a structural feature. The current dynamic runs in reverse: French nuclear is the price suppressor, not the deficit.

The FR-DE spread at €23.68 on 12 May represents a 37% compression from the €37.47 print of 7 May and a 58% compression from the €55.75 level of 28 April. Cross-border interconnector revenue for Coreso-area operators tracks the spread directly; a €23.68 spread earns less than half the arbitrage margin available on 28 April.

Hungary's €54 premium over Spain on the same day is the more structurally significant figure for forward desk positioning.

Hungary's isolation from cheap French nuclear and Spanish renewable exports reflects both limited cross-border interconnection capacity and the TurkStream supply dependence that the CJEU challenge and Commission derogation process (5 August deadline) place in regulatory uncertainty. Hungarian forward contracts price a structural gas-cost floor not shared by western European markets.

Flamanville-3 entering a one-year overhaul in September removes 1.6 GW of EPR baseload from the French fleet at the onset of the heating season. Forward positions pricing French nuclear suppression into Q4 will need to reprice that loss; the September event is three months out and not yet reflected in the current day-ahead variance.

Consensus view: OIES Research Fellow David Robinson notes that European day-ahead power prices have become structurally bimodal since 2023: high-renewable days produce near-zero or negative continental clearing, while thermal-set days produce €80-140 clearings.

The 88% intraday France swing on 11-12 May is a clean illustration of this pattern: Monday renewable surplus, Tuesday thermal return. The FR-DE spread compression to €23.68 reflects the same mechanism working on both markets simultaneously.

Counter-view: Agora Energiewende analysts in Berlin argue that the bimodal pattern overstates structural change: the current dispersion is partly a function of the Hormuz-driven gas price floor, which sets a high thermal clearing price on the days renewables recede. Absent €47 TTF, Tuesday clearings would be closer to €60-70 across the continent, narrowing the intraday swing materially.

Key tension: Whether the €30+ intraday variance that forward desks now trade is a permanent feature of the post-Russian-pipeline European grid or a gas-price artefact that compresses when Hormuz reopens.

Sources:euenergy.live

Mentions:France →Germany →Hungary →Spain →ACER →EDF →European Commission →Slovakia →Russia →Berlin →Flamanville-3 →TurkStream →ENTSOG →TTF →

First Reported In

Update #9 · Storage 35% met, 80% trajectory still missed

euenergy.live· 12 May 2026

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Causes and effects

Caused by

FR-DE spread to €37 at higher floors

FR-DE spread compressed from EUR 37.47 on 7 May to EUR 23.68 on 12 May, continuing the post-28 April compression trajectory.

Occurred 7 May 2026

Read story →

France-Germany May power spread doubles record

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 28 Apr 2026

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ACER names Hungary, Slovakia at TurkStream

ACER's 6 May opinions on seven NRA TurkStream derogation requests, including Hungary, compound Hungary's EUR 54 premium above Spain with regulatory uncertainty.

Occurred 6 May 2026

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France €9, Germany €103: record spread

The 3 June spread record is the third escalation in the same FR-DE structural gradient that compressed to EUR 23.68 on 12 May (ID:3221) before doubling to EUR 46.58 on 21 May.

Occurred 3 Jun 2026

Read story →

This Event

France swings 88% as FR-DE spread halves

The new forward signal on French clearings is intraday variance, not absolute level; Hungary's €123.23 print, €54 above Spain, is the largest single-market premium of the briefing series.

Led to

FR-DE day-ahead spread doubles to €46.58

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.

Occurred 21 May 2026

Read story →

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