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

BATTERY STORAGE Β· NGET

BESS Cilfynydd

BESS Cilfynydd is a 200 MW battery storage project in planning, connecting to the National Grid (England & Wales) network at Cilfynydd 400kV Substation, with capacity due from July 2029. The connection agreement is held by Rewe 2 Limited.

Project stageIn planning
  1. Planning (current stage)
  2. Consented (not yet reached)
  3. Construction (not yet reached)
  4. OperatingFrom Jul 2029 (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-002008
Customer
Rewe 2 Limited
Technology
Energy Storage System
Total capacity
200 MW
Change in this agreement
+200 MW
Capacity effective from
12 July 2029
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