Grid infrastructure › Connection queue › Battery storage
BATTERY STORAGE · NGETLegacy Tertiary Connection
Legacy Tertiary Connection is a 57 MW battery storage project consented, connecting to the National Grid (England & Wales) network at Legacy 400kV Substation, with capacity due from August 2024. The connection agreement is held by Hd639Leg Limited.
Project stageConsented
- Planning (completed)
- Consented (current stage)
- Construction (not yet reached)
- OperatingFrom Aug 2024 (not yet reached)
- Closed (not yet reached)
Connection details
- NESO project number
- PRO-001171
- Customer
- Hd639Leg Limited
- Technology
- Energy Storage System
- Total capacity
- 57 MW
- Change in this agreement
- +57 MW
- Capacity effective from
- 31 August 2024
- Connection site
- Legacy 400kV Substation
- Transmission owner
- National Grid (England & Wales)
- Connection type
- Direct connection to the transmission network
- NESO project status
- Consents Approved
Connection site
The marker shows the connection substation, not the project itself, with the transmission network around it.
Other projects at Legacy 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