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.

245.9TWh

Nuclear output at end-August 2026 – France
21.4TWh

Nuclear output at end-August 2026 - UK
28.3TWh

Hydro output at end-August 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 August 2026 amounted to 26.2TWh, up by 2.4TWh vs August 2025.

Since the beginning of the year, cumulative annual output was 245.9TWh, up by 5.9TWh compared to 2025. This is due to the roll-out of the 2026 outages, as planned and to the good availability of the reactors in operation, despite the impact of the environmental constraints during the heat waves.

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

	August 2025	August 2026	Change
Output of the month	28.6TWh	26.2TWh	-8.4%
Cumulative output	240.0TWh	245.9TWh	2.5%

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Nuclear output in August 2026 was 3.1 TWh, 0.4TWh up from August 2025.

Cumulative output was 21.4TWh, down by 2.2TWh vs prior year, due to higher number of unplanned outages in 2026.

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

	August 2025	August 2026	Change
Output of the month	2.7TWh	3.1TWh	13.8%
Cumulative output	23.6TWh	21.4TWh	-9.5%

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 August 2026 (description bellow)

	August 2025	August 2026	Evolution
Output of the month¹	2.4TWh	2.1TWh	-12.4%
Cumulative output²	29.0TWh	28.3TWh	-2.3%

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

(2) Cumulative production after deduction of pumping consumption: 23.6TWh in 2025 and 22.5TWh 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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