Grid infrastructure › Connection queue › Battery storage
BATTERY STORAGE · SPTElmya Dunbar BESS
Elmya Dunbar BESS is a 400 MW battery storage project in planning, connecting to the SP Transmission (south Scotland) network at Thorntonloch 400kV Substation, with capacity due from October 2031. The connection agreement is held by Elmya Energy UK 1 Limited.
Project stageIn planning
- Planning (current stage)
- Consented (not yet reached)
- Construction (not yet reached)
- OperatingFrom Oct 2031 (not yet reached)
- 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-002290
- Customer
- Elmya Energy UK 1 Limited
- Technology
- Energy Storage System
- Total capacity
- 400 MW
- Change in this agreement
- +400 MW
- Capacity effective from
- 31 October 2031
- Connection site
- Thorntonloch 400kV Substation
- Transmission owner
- SP Transmission (south Scotland)
- Connection type
- Direct connection to the transmission network
- NESO project status
- Scoping
- Connections reform gate
- Gate 1
Connection site
The connection site could not be placed on the map.
Other projects at Thorntonloch 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