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European Tech Sovereignty
22SEP

German spark spread hits cycle worst

3 min read
10:47UTC

German day-ahead power fell 41 per cent between Friday and Monday as onshore wind rose sevenfold. The clean spark spread went to minus €40 to minus €46/MWh on cheaper gas, not dearer.

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TechnologyAssessed
Key takeaway

Cheaper gas made German gas plants less viable, because power fell twice as far as fuel.

German day-ahead power cleared €76.97/MWh on Monday 27 July, down 41 per cent from €130.97 on Friday 24 July, while onshore wind rose sevenfold from 2.97 GW to 22.56 GW across the same four sessions. 1 2 Both figures come from SMARD, the German electricity market data platform run under Bundesnetzagentur licence, via the Fraunhofer ISE energy-charts service. Monday's number is the arithmetic mean of 88 of 96 quarter-hourly prints, a partial day.

The fuel leg fell too, but nothing like as far. TTF front-month gas gave back about 8 per cent over the same window. Put both legs through the method this desk published on 20 July, a 55 to 58 per cent efficiency band and 0.2 tCO2 per MWh, and the German clean spark spread now sits between minus €40.42 and minus €45.91/MWh. A week ago the identical calculation returned minus €14.81 to minus €20.37 . It reproduces that published figure exactly, which is the reason to trust the new one.

So the deepest inversion of the cycle arrived on cheaper fuel. That inverts the usual reading. When gas spikes and power lags, as it did through the Strait of Hormuz premium that took TTF to €55 in mid-July , the inversion mean-reverts once the fuel shock passes. This one cannot revert on the fuel leg, because the fuel leg has already fallen. It reverts only when the wind drops, and the German cavern operators reached the same conclusion from the storage side on 21 July when prompt injection collapsed .

The counter-argument deserves stating before anyone else states it. 26 July was a Sunday, Monday's figure is incomplete, and a weekend demand trough plus one windy Monday is a thin base for calling anything the worst of a cycle. Two answers. The 20 July comparator was itself a Monday, so the week-on-week move is like-for-like. And this is a claim about where the spread sits now, not a forecast that it stays there.

Deep Analysis

In plain English

A power station that burns gas has two things that decide whether it makes money: what the gas costs, and what it gets paid for the electricity it produces. This week both fell, but the electricity price fell much further and much faster than the gas price did, because a lot more wind turned than expected. That leaves German gas power stations worse off even though their fuel got cheaper, because cheaper fuel does not help if nobody needs to buy the electricity a gas plant makes.

Deep Analysis
Root Causes

Germany's dispatchable gas fleet now sits at the top of a merit order whose bottom 25 to 30 GW of onshore wind can appear or disappear inside 48 hours, as the sevenfold swing from 2.97 GW to 22.56 GW just demonstrated; when that swing floods the market, gas is pushed off the clearing price entirely, regardless of what the fuel itself costs.

The capacity-payment fix for exactly this problem, the StromVKG auction that opened bids on 21 July with a submission deadline of 8 September, has not yet cleared EU state-aid approval; the mechanism designed to protect this fleet's economics is itself running behind the market condition it exists to address.

What could happen next?
  • Consequence

    German gas plant stays out of the merit order through the rest of the injection season unless wind drops sharply, pushing any supply gap onto imports, coal or reserve capacity instead.

  • Risk

    Any spark-spread hedge structured on the assumption that a fuel-price fall improves gas-plant economics now carries a demonstrated counter-example from this window.

Sources:SMARD / Bundesnetzagentur via Fraunhofer ISE energy-charts·SMARD / Bundesnetzagentur via Fraunhofer ISE energy-charts·TradingEconomics
Mentions:Germany →TTF →EUA →CCGT →SMARD →Bundesnetzagentur →StromVKG →Fraunhofer ISE →Strait of Hormuz →
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
German gas plants priced out of merit
The 20 July spark-spread inversion (ID:5152) deepened into the cycle's worst print as wind, not the earlier gas/carbon premium, took over as the driver.
Occurred 19 Jul 2026
Read story →
Strike halt lands across two days
The US-Iran strike halt cut TTF 8 per cent, the fuel-leg component of the spark-spread move that the wind surge dominated.
Occurred 24 Jul 2026
Read story →
This Event
German spark spread hits cycle worst
A spark spread this deep on falling fuel prices tells German gas plants their problem is weather, not the gas price.
Led to
German caverns quit the prompt-gas bid
The deepened spark-spread collapse confirms the storage economics that had already pushed German caverns out of the prompt gas market on 21 July (ID:5232).
Occurred 21 Jul 2026
Read story →
German gas plants back in profit
The wind collapse of 28-31 July reversed the sevenfold wind surge that had driven German day-ahead down 41 percent on 27 July.
Occurred 30 Jul 2026
Read story →
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