Grid infrastructure › Connection queue › Battery storage
BATTERY STORAGE · SPTLightsource Mount Annan BESS
Lightsource Mount Annan BESS is a 150 MW battery storage project in planning, connecting to the SP Transmission (south Scotland) network at Chapelcross 132/33kV, with capacity due from October 2031. The connection agreement is held by Lightsource Renewable UK Development Limited.
- 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-003034
- Customer
- Lightsource Renewable UK Development Limited
- Technology
- Energy Storage System
- Total capacity
- 150 MW
- Change in this agreement
- +150 MW
- Capacity effective from
- 31 October 2031
- Connection site
- Chapelcross 132/33kV
- Transmission owner
- SP Transmission (south Scotland)
- Connection type
- Direct connection to the transmission network
- NESO project status
- Scoping
Connection site
The marker shows the connection substation, not the project itself, with the transmission network around it.
Other projects at Chapelcross 132/33kV
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