Operational performance

Please find the EDF group’s main operational KPIs, linked to electricity output, volumes distributed and customer data. This information allows to understand the Group’s activity and his overall performance.

271.9TWh

Nuclear output at end-September 2026 – France
24.0TWh

Nuclear output at end-September 2026 - UK
30.1TWh

Hydro output at end-September 2026 – France
41.1 millions

Group customers in 2025
167.3TWh

volumes distributed by Enedis in S1 2026

Nuclear output

Nuclear output is a key indicator of the operational performance of EDF. This section presents the output data in France and in the UK, to follow the evolution of the nuclear fleet and its contribution to the group generation mix.

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Nuclear output in September 2026 amounted to 26.0TWh, down by 2.9TWh vs September 2025.

Since the beginning of the year, cumulative annual output was 271.9TWh, up by 3.0TWh compared to 2025. This is due to the roll-out of the 2026 outages, generally in line with forecasts, as well as the good availability of the reactors in operation, despite operational constraints linked to the situation of the rivers.

Evolution of cumulative nuclear output in France in September 2026 (description bellow)

	September 2025	September 2026	Change
Output of the month	28.9TWh	26.0TWh	-10.0%
Cumulative output	268.9TWh	271.9TWh	1.1%

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Nuclear output in September 2026 was 2.6TWh, 0.9TWh up from September 2025.

Cumulative output was 24.0TWh, down by 1.3TWh vs prior year, due to higher number of unplanned outages in 2026.

Evolution of cumulative nuclear output in the United Kingdom in September 2026 (description bellow)

	September 2025	September 2026	Change
Output of the month	1.7TWh	2.6TWh	54.7%
Cumulative output	25.2TWh	24.0TWh	-5.2%

Hydro output

Hydro output, by being a renewable, manageable and flexible energy, contributes to the EDF’s energy mix balance. This section presents the output data in France, with a distinction between monthly and cumulative data, to track trends in the hydro activity.

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Evolution of cumulative hydro output in France in September 2026 (description bellow)

	September 2025	September 2026	Evolution
Output of the month¹	2.5TWh	1.8TWh	-26.5%
Cumulative output²	31.4TWh	30.1TWh	-4.2%

(1) Hydropower excluding electrical activities on French islands, before deduction of pumping consumption

(2) Cumulative production after deduction of pumping consumption: 25.1TWh in 2025 and 23.9TWh in 2026

Distribution data

This section presents key indicator for electricity distribution and allows to follow the volumes distributed by Enedis.

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Group customers

This section presents key indicator on the Group’s customers. It allows to follow the track changes in the group’s total number of customers over a three-year period.

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