RTE publishes a map of hosting capacities for storage.

Beneficiaries

• Storage facilities

This map is available on the Analyses and Data portal (menu DATA, category Transmission network).

The map displays the hosting capacities for storage without power limitation

By hovering over each substation with the mouse, or by downloading the data, the map shows the maximum hosting capacity (in MW) available for a storage facility on the substation concerned, without po<er limitation. This capacity is therefore available for both withdrawal and injection

The hosting capacities displayed have been calculated using the same methodology as for the connection studies. They therefore take into account:

• Customers already in the queue, i.e. for which a TFP has been accepted;
• Capacity reserved for renewable energy producers under the S3REnR, and capacity reserved for consumption under the pooling areas;
• Works on the network that has already been decided, as well as works planned under the S3REnR, or works associated with connections already in the queue.

The hosting capacity displayed will not be available for all the requests

RTE has chosen to publish a hosting capacity value per substation in order to clearly and understandably display the capacity theoretically accessible at each substation, if considered independently. In reality however, the hosting capacities of the various substations cannot be added: for substations located in the same electrical zone whose capacity depends on identical constraints on the upstream network, the capacity taken on one substation will no longer be accessible on the other substations in the zone.

Furthermore, while connection projects already in the queue are taken into account, this is not the case for connection requests that do not yet have an accepted TFP. Any competing requests for access to the same capacity, whether on the same substation or on nearby substations, will be processed in accordance with the connection procedure, by submitting TFP offers in the order in which the requests are received. The first TFP accepted will render the other competing offers null and void.

Finally, only the available electrical capacity (in MW) has been studied for the purposes of this mapping. It is therefore possible that some substations do not have enough space to accommodate a new connection cell. An engineering study therefore remains necessary when processing requests, which may in some cases limit the possibility of connecting a new project to a substation.

Connection requests made based on the map

The purpose of this map is to inform storage customers about available hosting capacity. Given that this map provides the same information on electrical capacity as an exploratory study, the exploratory study requests for the connection of a new storage facility on substations displayed in red on the map (capacity is less than 5 MW) will not result in attractive offers.

As this map does not provide an estimate of the costs and connection times, nor on the feasibility of the physical connection in the substation, it will not replace exploratory studies.

Consequently, this map will not replace an exploratory study in the case of a TFP request based on the capacities displayed.

TFP applications submitted following the publication of the map will comply with the connection procedure specified in the Reference Technical Documentation (fixed sum and repayment conditions, D1/D2 forms, land certificate, etc.).

Contact(s)

For any questions, please contact your account manager or marketservices@rte-france.com.