Power plant · Gwynedd, Wales, United Kingdom
Seion, Pentir - Battery Energy Storage System
Seion, Pentir - Battery Energy Storage System is a cancelled power plant in Gwynedd, Wales, United Kingdom, with 99.9 MW of capacity, operated by Brockwell Storage & Solar Limited.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | Gwynedd (coordinates), Wales | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Address | S/O B4547 Seion, Pentir, Llanddeiniolen, Caernarfon, LL55 3AN | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Cancelled (planning permission refused) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 8 Apr 2025 (reference C25/0277/18/LL, planning authority Gwynedd) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 23 Jan 2026 (refused, reference C25/0277/18/LL, planning authority Gwynedd) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Brockwell Storage & Solar Limited | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 99.9 MW | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Battery (stand-alone storage) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Coordinates | 53.1868, -4.1642 | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
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How it compares
Seion, Pentir - Battery Energy Storage System is the 11th-largest of 424 power plants in Wales and the 153rd-largest of 5,050 in the United Kingdom by capacity; its 99.9 MW is <0.1% of the 115,642 MW we hold for the United Kingdom. Ranks and totals cover the power plants in our data that report their capacity, not every one in existence. Power plants planned, permitted or under construction are ranked apart.
| Within | Rank | Total | Share |
|---|---|---|---|
| Wales | 11th of 424 | 9,068 MW | 1.1% |
| United Kingdom | 153rd of 5,050 | 115,642 MW | <0.1% |
| All power plants in our data | 1,241st of 12,008 | 1,173,302 MW | <0.1% |
Nearby
Within 50 km of this power plant: 1 transmission line, measured from the coordinates in the facts above.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| North Wales Wind Farms Connection | Transmission line | — | Permitted | 48 km |
Operator and place
More from Brockwell Storage & Solar Limited
- Peat Dykes Farm, Harrop Lane - Battery Energy Storage System100 MW · permitted
- Dolphingstone Farm - Battery Energy Storage System63 MW · permitted
- Inchbean Farm, Treeswoodhead Road - Battery Energy Storage System60 MW · permitted
- Rush Green Motors - Battery storage50 MW
- Scawby Road - Solar Array49.9 MW · planned
- Sundridge Hill49.5 MW · under construction
- Tollgate Farm Battery Storage49.5 MW · under construction
- Scawby Road - Solar Array30 MW · planned
Other power plants in Wales
- Dinorwig1,728 MW
- Gwynt y Mor576 MW
- Ffestiniog360 MW
- Port Talbot Renewable Energy Plant350 MW
- Anglesey Biomass Power Station299 MW
- Tidal Lagoon Swansea Bay240 MW
- Pen Y Cymoedd228 MW
- Carnedd Wen Wind Farm150 MW
Data on this page
- DESNZ Renewable Energy Planning Database (REPD). DESNZ Renewable Energy Planning Database (REPD), Open Government Licence v3.0.
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
- Planning Inspectorate: National Infrastructure Projects. Planning Inspectorate: National Infrastructure Projects, Open Government Licence v3.0.
- RVO SDE(+)(+) projecten in beheer and SDE viewer. RVO SDE(+)(+) projecten in beheer and SDE viewer, Free reuse, no attribution required.