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France goes EUR 43 below Germany

3 min read
10:53UTC

French day-ahead cleared EUR 41.13/MWh on Sunday against Germany's EUR 84.22, the widest discount of the run. Our own WATCH FOR said French nuclear would drive it. French nuclear did not move.

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EconomicAssessed
Key takeaway

France's discount came from weekend demand and wind, not from the nuclear recovery we predicted.

French day-ahead cleared EUR 41.13/MWh on Sunday 26 July against Germany's EUR 84.22, a French discount of EUR 43.09. On 20 July the same discount was EUR 4.06 . 1 France exported 15.21 GW net that day, its hardest export day of the week. 2

This desk's own WATCH FOR asked whether the spread would re-widen once the heat broke and French nuclear reasserted its cost advantage. It re-widened, and we named the wrong driver. French nuclear output did not move: 39.82 GW on Thursday 23 July, 40.14 GW on Friday the 24th, 39.07 GW on the Sunday the discount hit its widest. 3 EDF's slipped restart schedule contributed nothing to the move. A Bugey 3 restart reported on 18 July remains unconfirmed by this desk, and it is a separate matter from the reactors 4 and 5 thermal derogation that expired on 20 July. 4

Demand and weather produced the discount instead. French load fell from 44.97 GW on Friday to 38.34 GW on Sunday, the weekend trough, while French onshore wind more than doubled from 2.76 GW to 5.93 GW. 5 A flat nuclear stack into a shrinking domestic load has to go somewhere, and it went across the interconnectors until the export capacity ran out.

Anyone long France against Germany on a nuclear thesis was right about the direction and wrong about the mechanism, which is the more expensive way to be right. The position survives exactly as long as the mechanism holds, and this one is a Sunday and a wind field, both of which reverse on Monday. Through the summer the FR-DE spread answers to German wind and weekend load, not to EDF's availability calendar; the nuclear-availability regime returns in winter, when French electric heating puts French load rather than German supply in charge of the difference.

Deep Analysis

In plain English

French electricity is usually cheap because most of it comes from nuclear reactors, which cost very little to run once they are built. This weekend, French power got even cheaper than usual compared with Germany, and a trading desk at this briefing had guessed that was because French reactors were coming back online after summer repairs. They were not; French nuclear output barely changed. What actually happened was a quiet Sunday with low demand in France and a lot of German wind, both pushing the price gap wider without France's nuclear fleet doing anything different.

Deep Analysis
Root Causes

The French day-ahead price is set by nuclear's near-zero marginal cost as long as any meaningful share of the fleet is running, so the width of the FR-DE spread is actually driven by German demand and wind volatility, not by French supply volatility; France's price floor barely moves while Germany's price swings across a wide range.

The practical ceiling on how wide the discount can go is the interconnector, not French generation: France's 15.21 GW net export on 26 July was its hardest export day of the week, so a future demand or wind swing that would otherwise widen the discount further is capped by how much power can physically cross the border.

What could happen next?
  • Meaning

    Nuclear availability has lost predictive value for the FR-DE spread in summer, when German wind and weekend demand now dominate the difference.

  • Risk

    A cross-border spread position built on an EDF outage calendar carries an unhedged German wind exposure that the calendar does not capture.

Sources:SMARD / Bundesnetzagentur via Fraunhofer ISE energy-charts·SMARD / Bundesnetzagentur via Fraunhofer ISE energy-charts
Mentions:France →Germany →EDF →Bugey 3 →Bundesnetzagentur →
First Reported In

Update #30 · Wind, not peace, sank the German spark

SMARD / Bundesnetzagentur via Fraunhofer ISE energy-charts· 27 Jul 2026
Read original →
Causes and effects
Caused by
France cheaper on a waiver ending today
The 20 July French discount (ID:5153) rested on a Bugey thermal waiver; the 26 July discount arose from wind and demand instead, a different mechanism producing a similar direction.
Occurred 19 Jul 2026
Read story →
EDF slips three reactor restarts to late July
EDF's restart schedule (ID:5006), once expected to firm French nuclear output, produced none of the widest French discount of the run.
Occurred 14 Jul 2026
Read story →
This Event
France goes EUR 43 below Germany
A cross-border spread position framed on EDF outage calendars turns out to carry an unhedged German wind exposure.
Led to
France follows Germany as spread narrows
The French day-ahead rise narrowed the EUR 43.09 French discount recorded on 26 July to a EUR 7-17 German premium.
Occurred 30 Jul 2026
Read story →
Different Perspectives
Cross-border power traders
Cross-border power traders
The France-Germany day-ahead spread flipped from a EUR 17.20 German premium on 1 August to a EUR 4.15 French premium on 3 August, the same day French curtailment peaked. They cannot yet attribute the flip to curtailment alone, since a like-for-like overnight comparison shows French nuclear output rising while wind fell and demand returned on the weekday step.
EDF
EDF
River-cooling limits took 7.6 GW, 12 per cent of its fleet, offline on 3 August, the highest curtailment since the heatwave began, with an easing forecast to 4.3 GW on 4 August and 3 GW after. It manages the cut as a recurring seasonal constraint, expecting it to lift with river temperature, not repair.
Gasunie
Gasunie
TTF, the Dutch hub it operates, drifted to roughly EUR 55 to 58 per MWh across the window, staying inside its recent range through both the German spark reversal and the French curtailment. It reads a flat hub price as evidence that neither event this window carried enough weight to move the fuel leg on its own.
German gas-fired generators
German gas-fired generators
Record German solar of 18,761 MW on 2 August pushed the clean spark spread to minus 18.48 EUR/MWh, a loss-making day, before it returned to plus 16.20 on 3 August. They now price dispatch against post-solar residual load rather than wind alone, since the sign flipped inside 48 hours on unchanged fuel and carbon costs.
European Commission (DG Energy)
European Commission (DG Energy)
Its implementing-measures register logged transposition notices from only Portugal and Slovakia against Wednesday's Article 94 deadline for Directive (EU) 2024/1788, with 25 states silent. It expects the register to fill only gradually, since filing routinely lags legislating and any infringement track against non-notifying states runs on a slower clock than the deadline itself.
Spain's LNG terminal operators
Spain's LNG terminal operators
Spain's 9,145 GWh terminal inventory is the largest single stock in the EU LNG network, an option value that can reroute cargoes wherever the winter strip pays best rather than a cavern gas obligation tied to a fixed date. That flexibility matters more as Germany's cavern shortfall pushes more of the winter security question onto import infrastructure.