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- have access to the “favourites” feature,
- be able to download certain data published by RTE,
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Beneficiaries
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Electricity Suppliers
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DSOs
The ARENH mechanism
The ARENH (Regulated Access to Historic Nuclear Electricity) scheme enabled suppliers and network operators to purchase electricity generated by EDF's historic nuclear power plants at a regulated price during the period from 1 July 2011 to 31 December 2025.
As the ARENH mechanism expires on 31 December 2025, it is no longer possible to apply for ARENH rights. However, the operational functioning of the mechanism will continue until the price supplements are calculated in 2026.
How it works
Electricity suppliers wishing to exercise their ARENH rights made an application to CRE, based on demand forecasts.
The latest ARENH rights applications took place at the end of 2024 for the year 2025.
At the end of 2024, the CRE allocated and notified suppliers of their ARENH rights for 2025. These volumes were also notified to EDF, Caisse des Dépôts et Consignations and RTE.
RTE's role consisted of transferring energy to the perimeter of the balance responsible parties designated by the suppliers activating their ARENH rights. The transfer is carried out in such a way that EDF is not aware of the quantities transferred to each the balance responsible party.
Financial flows are handled by the Caisse des Dépôts et Consignations.
To avoid any windfall effects, a retrospective mechanism has been set up to offset any surplus volumes allocated, in the event that the supplier's portfolio has not developed in line with forecasts. This mechanism takes the form of a price premium for any surplus quantities of electricity allocated. It is done by the CRE on an ex post basis, according to actual electricity consumption observed by the supplier's customers.
Thus, the operational functioning of the mechanism will continue to be ensured until the price sipplements for 2025 are calculated in 2026.
Calculating observed consumption
The calculation methods and the terms for consumption transmission proposed by RTE were approved by the CRE on December 15 2011. The methods serve to accurately identify consumption by each of the consumer categories (≤ 36 kVA and >36 kVA), for the purposes of determining suppliers' ex post ARENH entitlements.
Data exchanges between a DSO and RTE
The distribution system operators send RTE the PDS load curves aggregated by BRP, which are described in the calculation method for the observed consumption of a supplier under the ARENH scheme. RTE aggregates these with the PTS load curves and publishes them for balance responsible parties.
A balance responsible party whose perimeter includes end customers served by multiple suppliers, at least one of whom enjoys ARENH rights, is qualified as a multi-supplier BRP. In this case, the multi-supplier BRP must send RTE the detailed load curves for each supplier.
Following data transmissions by the DSOs and multi-supplier BRPs, RTE calculates and sends to the CRE by the end of April at the latest (April 2026 for the final year 2025), the observed consumption of the past calendar year and for each supplier who has acquired electricity under the ARENH arrangement.
More information in the following documents:
Contractual Framework
In order to exercise their ARENH rights, suppliers were required to sign a standard agreement with EDF.
The DSO and balance responsible parties designated by a supplier having acquired electricity under the ARENH scheme had to sign a contract with RTE which is based on the Rules on the transmission of data for Regulated Access to Incumbent Nuclear Electricity.
Contact
For any questions, please contact your usual account manager or marketservices@rte-france.com