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Grid infrastructure β€Ί Connection queue β€Ί Battery storage

BATTERY STORAGE Β· NGET

Cilfynydd 2

Cilfynydd 2 is a 240 MW battery storage project in planning, connecting to the National Grid (England & Wales) network at Cilfynydd 400kV Substation, with capacity due from October 2037. The connection agreement is held by Rewe 8 Limited.

Project stageIn planning
  1. Planning (current stage)
  2. Consented (not yet reached)
  3. Construction (not yet reached)
  4. OperatingFrom Oct 2037 (not yet reached)
  5. Closed (not yet reached)

Scoping and awaiting consents are both shown as planning. A connection agreement does not mean the project will be built: many queue projects never reach construction.

Connection details

NESO project number
PRO-003962
Customer
Rewe 8 Limited
Technology
Energy Storage System
Total capacity
240 MW
Change in this agreement
+240 MW
Capacity effective from
15 October 2037
Connection site
Cilfynydd 400kV Substation
Transmission owner
National Grid (England & Wales)
Connection type
Direct connection to the transmission network
NESO project status
Scoping

Connection site

The marker shows the connection substation, not the project itself, with the transmission network around it.

Projects connecting near Cilfynydd Β· Grid map

Other projects at Cilfynydd 400kV Substation

Source: NESO Transmission Entry Capacity (TEC) register, downloaded 8 November 2026. Contains data from NESO, licensed under the NESO Open Data Licence. Report a problem