EFDA JJET Fusion Flywheel — United Kingdom
Storage power plant in England, United Kingdom. Approximate location 51.6579, -1.2287.
StorageEnglandUnited Kingdom
EFDA JJET Fusion Flywheel is a 400 MW storage power station in England, United Kingdom. It is operated by EFDA JET. Based on its capacity (estimated), it can supply roughly 100k homes (estimated). It ranks #98 of 2,860 United Kingdom power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, the national grid averages 217 gCO₂/kWh (64.4% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GBR2001150.
Data status
Known data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 400 MW, EFDA JJET Fusion Flywheel is well above the median storage plant in United Kingdom (10 MW). This facility converts its energy source into electricity for the grid; its capacity, fuel type and location determine its role in the national power mix.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Share of United Kingdom storage capacity
- 44.6% of 897 MW across 31 plants in this dataset
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest storage plants in United Kingdom
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by EFDA JET.
Local climate & thermal context
This storage plant stores and releases electricity (pumped-hydro or batteries) to balance the grid. It sits in a temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 51.7°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 21% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 62/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #1 largest storage power plant of 31 in United Kingdom by capacity.
United Kingdom has 31 storage power plants in this dataset, together about 897 MW of capacity.
Nearby power plants
- Sutton Courtney · Waste · 6 MW · England
- Sutton Courtenay Landfill Scheme · Waste · 5.6 MW · England
- Didcot power station · Coal · 2,172 MW · Oxfordshire
- Didcot B · Gas · 1,440 MW · England
- Didcot GT · Gas · 100 MW · England
- Wally Corner Landfill Site · Solar · 7 MW · England
Location
Coordinates 51.6579, -1.2287 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is EFDA JJET Fusion Flywheel?
EFDA JJET Fusion Flywheel is a 400 MW storage power plant in England, United Kingdom.
Who operates EFDA JJET Fusion Flywheel?
EFDA JJET Fusion Flywheel is operated by EFDA JET.