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Iran Conflict 2026
21JUN

German power climbs to €156, spark flips

2 min read
17:51UTC

German day-ahead power cleared €156/MWh on 16 July, up from €126 two days earlier, as cooling demand under the heat dome dragged the clean spark spread from negative into positive.

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Key takeaway

A demand-driven spark spread turned Germany's CCGTs profitable, a margin a cooler week would knock out.

Germany day-ahead power cleared an average €126/MWh on 14 July, €132 on 15 July and €156 on 16 July, climbing on cooling demand as the heat dome held 1. Day-ahead is the price for next-day delivery; the clean spark spread is what a gas-fired CCGT earns after paying for its gas and its carbon. Run these clears through the standard 49.13% efficiency and 0.365 tCO2/MWh convention, against TTF near €55 and EUA carbon near €80, and the spread swings from roughly negative on 14 July to positive by 16 July.

German combined-cycle plants clear because the heat needs the megawatts, and the margin turning positive is a by-product of power outrunning its inputs rather than any softening in gas. That distinction is the whole trade: a spark spread that widens on power strength behaves differently from one that widens on cheap fuel, because it collapses the moment the heat breaks.

This eases rather than reverses the squeeze the desk logged on 9 July, when gas and power rose together and compressed the same spread . Then the pressure came from the fuel side; now it comes from demand. The CCGT stack is back in the money, but on a footing that a cooler week would knock straight out again.

Deep Analysis

In plain English

Gas-fired power stations in Germany make money on the gap between what they pay for gas and carbon permits and what they earn selling electricity. That gap, called the clean spark spread, had been slim or negative for weeks. This week electricity prices jumped because of the heat wave (people running air conditioning), while gas and carbon costs did not rise as much, so gas power plants suddenly became profitable to run again. It is less about gas getting cheaper and more about electricity getting more expensive faster than its ingredients did.

Deep Analysis
Root Causes

Germany's clean spark spread flips sign whenever day-ahead power climbs faster than its two input costs, gas (TTF) and carbon (EUA), move together. This window that happened because cooling demand pulled German day-ahead from €126 to €156/MWh across three sessions while TTF firmed only modestly and EUA actually eased back under €81 (see the carbon event in this briefing), leaving the power side of the equation to do almost all the work.

The structural precondition is thin renewable output: when wind generation is low during a heat dome, as it has been through this window, German CCGT plant sets the marginal clearing price directly, so any demand spike shows up in the power price with little dilution from cheaper generation displacing it.

What could happen next?
  • Consequence

    A positive clean spark spread gives German CCGT operators an incentive to run harder into the remaining heat window, which in turn supports gas demand even as storage injection slows elsewhere.

First Reported In

Update #27 · TTF hits EUR 55; the arb won't confirm it

Trading Economics· 16 Jul 2026
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