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Grid infrastructure β€Ί Connection queue β€Ί Hydro and pumped storage

HYDRO AND PUMPED STORAGE Β· NGET

Maentwrog

Maentwrog is a 30 MW hydro and pumped storage project built and connected, connecting to the National Grid (England & Wales) network at Maentwrog GSP. The connection agreement is held by Nuclear Decommissioning Authority.

Project stageOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. Operating (current stage)
  5. Closed (not yet reached)

Connection details

NESO project number
PRO-000261
Customer
Nuclear Decommissioning Authority
Technology
Hydro
Total capacity
30 MW
Already connected
30 MW
Connection site
Maentwrog GSP
Transmission owner
National Grid (England & Wales)
Connection type
Embedded (connects through the local distribution network)
NESO project status
Built

Connection site

The marker shows the place the connection site is named after, not the project itself, with the transmission network around it.

Projects connecting near Maentwrog GSP Β· Grid map

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