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European Tech Sovereignty
22SEP

France goes €43 below Germany

3 min read
10:47UTC

French day-ahead cleared €41.13/MWh on Sunday against Germany's €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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TechnologyAssessed
Key takeaway

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

French day-ahead cleared €41.13/MWh on Sunday 26 July against Germany's €84.22, a French discount of €43.09. On 20 July the same discount was €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
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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 €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 →
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