Power plant · Gwynedd, Wales, United Kingdom
Tyddyn Forgan, Llanddeiniolen - Energy Storage System
Tyddyn Forgan, Llanddeiniolen - Energy Storage System is a cancelled battery storage plant in Gwynedd, Wales, United Kingdom, with 100 MW of capacity, operated by Firstway Energy and Net Zero Twenty Six 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 | Tyddyn Forgan, Llanddeiniolen, Caernarfon, LL55 3AN | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Cancelled (planning permission granted, permission expired) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Permit date | 23 Jan 2026 (permit C25/0266/18/LL, Town and Country Planning Act, issued by Gwynedd) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 3 Apr 2025 (reference C25/0266/18/LL, planning authority Gwynedd) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 23 Jan 2026 (granted, reference C25/0266/18/LL, planning authority Gwynedd) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Firstway Energy (Firstway Energy / Net Zero Twenty Six Limited, applicant) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Net Zero Twenty Six Limited (Firstway Energy / Net Zero Twenty Six Limited, applicant) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 100 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 |
Research on this power plant and its operator.Who owns it up to the parent company, its grid connection and planning status, and an introduction to the operator.
Request researchLatest events
Dated events about this power plant from official notices and registers, newest first. All recent changes.
- Permit granted (planning authority Gwynedd, reference C25/0266/18/LL)
- Permit applied for (planning authority Gwynedd, reference C25/0266/18/LL)
How it compares
Tyddyn Forgan, Llanddeiniolen - Energy Storage System is the 18th-largest of 451 power plants in Wales and the 227th-largest of 5,837 in the United Kingdom by capacity; its 100 MW is <0.1% of the 200,833 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 | 18th of 451 | 16,665 MW | 0.6% |
| United Kingdom | 227th of 5,837 | 200,833 MW | <0.1% |
| All power plants in our data | 1,484th of 13,028 | 1,354,089 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 |
Operators and place
More from Firstway Energy
Other power plants in Wales
- Pembroke2,325 MW
- Dinorwig1,728 MW
- Aberthaw B1,559 MW
- Connahs Quay1,380 MW
- Severn Power Ltd850 MW
- Gwynt y Mor576 MW
- Deeside498 MW
- Ffestiniog360 MW
Data on this page
- Contains public sector information licensed under the Open Government Licence v3.0. DUKES 5.11: Power stations in the United Kingdom, Open Government Licence v3.0.
- Contains public sector information licensed under the Open Government Licence v3.0. 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.
- JRC Open Power Plants Database (JRC-PPDB-OPEN), European Commission, Joint Research Centre. JRC Open Power Plants Database (JRC-PPDB-OPEN), CC BY 4.0.
- Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
- Dutch power station owners' and operators' pages. Dutch power station owners' and operators' pages, Facts only, each linked to its page.
- Contains public sector information licensed under the Open Government Licence v3.0. 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.