Cemmaes
Cemmaes is a 15.3 MW onshore wind farm in Wales, operated by EDF Energy. The UK government lists it as operational in its register of power stations (DUKES table 5.11, May 2025).
- Onshore
- Wales
Key facts
- Installed capacity
- 15.3 MW
- Status
- Operational
- Technology
- Wind Β· Onshore
- Operator
- EDF Energy
- Region
- Wales
- Country
- Wales
- Grid connection (DUKES)
- LV
- Combined heat & power
- No
- Postcode
- SY20 9PR
- Coordinates
- 52.6399, -3.6743
Location
Map position from the published coordinates. For small sites this can be an approximate point rather than the exact boundary. Map Β© OpenStreetMap contributors.
How Cemmaes compares
At a typical UK load factor for this technology (about 26% of the maximum possible output), a 15.3 MW station would generate roughly 35 GWh of electricity in a year, similar to the annual use of about 12,910 homes at 2,700 kWh each. This is an illustrative estimate, not the station's metered output: real generation varies with weather, availability and grid constraints.
Wind farms turn the kinetic energy of the wind into electricity with turbines. Output varies with wind speed. Offshore sites usually see stronger, steadier winds than onshore sites and so generate more per MW of capacity.
All UK wind farms Wind farms in Wales All run by EDF EnergyNearby generating sites
- Mynydd Clogau Β· 14.5 MW onshore wind farm18.0 km
- Braich Ddu Β· 3.9 MW onshore wind farm19.8 km
- P&L Β· 30.6 MW onshore wind farm23.7 km
- Rheidol Hydro Scheme Gen 5 Β· 0.08 MW small hydro scheme25.0 km
- Rheidol Hydro Scheme Gen 3 Β· 20.5 MW hydroelectric station25.6 km
- Rheidol Hydro Scheme Gen 2 Β· 20.5 MW hydroelectric station25.6 km
- Rheidol Hydro Scheme Gen 6 Β· 0.05 MW small hydro scheme25.6 km
- Cambrian Β· 58.5 MW onshore wind farm26.6 km
Also operated by EDF Energy
EDF Energy operates 48 sites in the register. Largest first:
- Hinkley Point C Β· nuclear power station3,260 MW
- West Burton A Power Station Β· coal-fired power station2,012 MW
- Cottam Power Station Β· coal-fired power station2,008 MW
- Heysham 2 Β· nuclear power station1,240 MW
- Torness Β· nuclear power station1,200 MW
- Sizewell B Β· nuclear power station1,198 MW
- Hartlepool Β· nuclear power station1,185 MW
- Heysham 1 Β· nuclear power station1,060 MW
Planning history
From the government's Renewable Energy Planning Database (REPD), matched to this site by location, capacity and name.
- Planning status
- Operational
- Site name in planning record
- Cemmaes 'C' Wind Farm
- Developer / operator
- Vestas
- Planning authority
- Powys
- Planning reference
- M/2000/0846
- Application submitted
- 15 October 2000
- Permission granted
- 6 April 2001
- Began operating
- 23 February 2002
- Capacity in planning record
- 15.3 MW
- Address
- Cemmaes Machynlleth Powys, Powys
- REPD reference
- 2576
Source
Department for Energy Security and Net Zero (DESNZ), Digest of UK Energy Statistics (DUKES), table 5.11: power stations in the United Kingdom β operational at end of May 2025.
Capacity is installed capacity as published, not current output. Status reflects the source date, not live operation.
View the original source
Last checked by Octary: 15 July 2026
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