Cilfynydd 400kV Substation
Cilfynydd 400kV Substation (NGET) has 9 projects in NESO's TEC Register of 23 Oct 2026: 2,998 MW in the queue, 2,450 MW Gate 1, and 0 MW connected. Contracted capacity, not headroom.
- Transmission owner
- NGET
- Projects
- 9
- MW in the queue
- 2,998 MW
- Gate 1 MW
- 2,450 MW
- MW connected
- 0 MW
- Earliest confirmed date
- 31 Mar 2027
By technology
| Technology | Projects | MW |
|---|---|---|
| Storage | 6 | 2,715 |
| Solar | 3 | 1,600 |
| Onshore wind | 3 | 1,533 |
| Demand | 1 | 1,025 |
| Reactive Compensation | 1 | 0 |
Projects at Cilfynydd 400kV Substation
| Project | Technology | MW | Gate | Status | MW effective from |
|---|---|---|---|---|---|
| Cilfynydd Green Energy Centre | Demand, Storage, Solar, Onshore wind | 400–1,025 | Gate 1 | Awaiting Consents | 30 Oct 2029, 31 Oct 2033 |
| Penrhiwdarren Farm | Storage | 500 | Gate 1 | Scoping | 15 Sept 2037 |
| Cilfynydd | Storage, Solar, Onshore wind | 400 | Gate 1 | Awaiting Consents | 31 Oct 2030 |
| Cilfynydd BESS | Storage | 349.9 | Gate 1 | Scoping | 15 Sept 2037 |
| Cilfynydd 2 | Storage | 240 | Scoping | 15 Oct 2037 | |
| BESS Cilfynydd | Storage | 200 | Scoping | 12 Jul 2029 | |
| Merthyr Solar and Battery | Solar | 110–175 | Gate 1 | Scoping | 12 May 2029, 31 Oct 2037 |
| Twyn Hywel Cillfynydd | Onshore wind | 107.8 | Scoping | 1 Apr 2027 | |
| Cilfynydd Grid Stability Services | Reactive Compensation | 0 | Gate 2 | Consents Approved | 31 Mar 2027 |
Source
- NESO TEC Register, National Energy System Operator, publication of 23 Oct 2026. NESO Open Data Licence.