Power plant · Gwynedd, Wales, United Kingdom
Dinorwig
Dinorwig is a power plant in Gwynedd, Wales, United Kingdom, with 1,728 MW of capacity, operated by First Hydro Company.
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 |
| Location | Wales | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
| Address | Snowdonia, LL55 4TY | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Operating (operational) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Start year | 1983 | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | First Hydro Company | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 1,728 MW | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Pumped Storage Hydroelectricity (stand-alone storage) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Coordinates | 53.1194, -4.1115 | 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.
- Commissioned
Also recorded as
2 sources record Dinorwig; this page joins their facts, each with its own source. Links to any of the records lead here. How records are matched.
| Name in the source | Identifier | Source | Matched on |
|---|---|---|---|
| Dinorwig | asset:repd:6839 | DESNZ Renewable Energy Planning Database (REPD) | — |
| Dinorwig | asset:neso-tec:pro-000054 | NESO TEC Register | Same name, technology, capacity and company |
How it compares
Dinorwig is the largest of 424 power plants in Wales and the 2nd-largest of 5,050 in the United Kingdom by capacity; its 1,728 MW is 1.5% of the 115,622 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 | 1st of 424 | 9,068 MW | 19% |
| United Kingdom | 2nd of 5,050 | 115,622 MW | 1.5% |
| All power plants in our data | 116th of 12,032 | 1,190,447 MW | 0.15% |
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 | 43 km |
Operator and place
Grid connections attached to this power plant
- Dinorwig grid connection1,644 MW
More from First Hydro Company
- Ffestiniog360 MW
- Dinorwig grid connection1,644 MW
Other power plants in Wales
- 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
- Y Bryn Wind Farm130 MW
Data on this page
- 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.
- Supported by National Energy SO Open Data. NESO TEC Register, NESO Open Data Licence v1.0.
- 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.