🔌 EV Partnership Switch to Octopus Energy & unlock exclusive smart EV charging rates Find out more → Skip to main content

Grid infrastructure › Connection queue › Hydro and pumped storage

HYDRO AND PUMPED STORAGE · SPT

Cruachan U3&4 Replacement

Cruachan U3&4 Replacement is a 440 MW hydro and pumped storage project built and connected, connecting to the SP Transmission (south Scotland) network at Cruachan 275kV Substation. The connection agreement is held by Drax Pumped Storage Limited.

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-000113-1
Customer
Drax Pumped Storage Limited
Technology
Pump Storage
Total capacity
440 MW
Already connected
440 MW
Connection site
Cruachan 275kV Substation
Transmission owner
SP Transmission (south Scotland)
Connection type
Direct connection to the transmission network
NESO project status
Built

Connection site

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

Projects connecting near Cruachan · Grid map

Other projects at Cruachan 275kV 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