🔌 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

Whitelee Extension

Whitelee Extension is a 238 MW hydro and pumped storage project built and connected, connecting to the SP Transmission (south Scotland) network at Whitelee Extension 275/33kV. The connection agreement is held by Scottish Power Renewables (UK) Limited.

Project stageOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingDec 2026 (current stage)
  5. Closed (not yet reached)

Connection details

NESO project number
PRO-000068
Customer
Scottish Power Renewables (UK) Limited
Technology
Energy Storage System, Hydrogen, PV Array (Photo Voltaic/solar), Wind Onshore
Total capacity
238 MW
Already connected
206 MW
Change in this agreement
+32 MW
Capacity effective from
1 December 2026
Connection site
Whitelee Extension 275/33kV
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 Whitelee Extension · Grid map

Other projects at Whitelee Extension 275/33kV

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