Heatwave, negative prices and upcoming tensions in electricity markets

Heatwave, negative prices and upcoming tensions in electricity markets
Exceptionally high temperatures observed in recent days have boosted solar production and led, this weekend, to new episodes of negative prices on electricity markets.

On Saturday, the average spot price in France stood at €34.32/MWh, with a low of -€36.35/MWh. A notable level, but still far from the historic record of last May 1st, when the price reached -€498.65/MWh.
This increasingly frequent situation now represents a real challenge: massive production surpluses, particularly during periods of strong solar exposure, must be better absorbed by the power system in order to limit negative prices. In this regard, incentives to consume in the middle of the day are developing (changes to off-peak hours, new market products, dynamic offers, demand flexibility, etc.), promoting a better distribution of consumption and limiting negative prices.

But this dynamic of overproduction could quickly reverse.
With the arrival of intense heat, electricity demand is expected to rise significantly, driven in particular by air conditioning needs. At the same time, some production capacities could be constrained.

Solar should continue to benefit from favorable conditions.

On the other hand, wind power could remain limited depending on weather conditions.

Hydropower could also be affected by reduced water flows linked to drought episodes.

Nuclear is not spared either:
• Reactors require large quantities of water to remove the heat produced by nuclear fission and ensure cooling.
• During heatwaves, EDF may be forced to reduce the output of certain reactors when river temperatures reach regulatory thresholds, in order to preserve aquatic ecosystems.
Result: rising demand combined with potential constraints on several production sources could gradually tighten the market and support electricity prices in the coming weeks.

Finally, the geopolitical context remains worth monitoring. A lasting disruption of traffic in the Strait of Hormuz would continue to fuel tensions in global energy markets, with possible repercussions on energy prices in Europe.

After negative prices linked to solar abundance, will we witness a market reversal driven by heat and production constraints?