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Grid infrastructure › Connection queue › Battery storage

BATTERY STORAGE · NGET

Penrhiwdarren Farm

Penrhiwdarren Farm is a 500 MW battery storage project in planning, connecting to the National Grid (England & Wales) network at Cilfynydd 400kV Substation, with capacity due from September 2037. The connection agreement is held by Qair Renewables UK Limited.

Project stageIn planning
  1. Planning (current stage)
  2. Consented (not yet reached)
  3. Construction (not yet reached)
  4. OperatingFrom Sep 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-003828
Customer
Qair Renewables UK Limited
Technology
Energy Storage System
Total capacity
500 MW
Change in this agreement
+500 MW
Capacity effective from
15 September 2037
Connection site
Cilfynydd 400kV Substation
Transmission owner
National Grid (England & Wales)
Connection type
Direct connection to the transmission network
NESO project status
Scoping
Connections reform gate
Gate 1

Connection site

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

Projects connecting near Cilfynydd · 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