COMPOSTILLA II GR 5 — Spain

COMPOSTILLA II GR 5 is a 1,005.1 MW coal power station in Castille and Leon, Spain. It is operated by ENDESA GENERACION S.A.. Based on reported annual generation of 4,270 GWh, it can supply roughly 1.2 million homes. It ranks #20 of 899 Spain power plants by installed capacity. Commissioned in 1984, it is around 42 years old — long-established. In context, coal supplies about 0.3% of Spain's electricity; the national grid averages 154 gCO₂/kWh (74.6% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1006393.

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 1,005.1 MW, COMPOSTILLA II GR 5 is well above the median coal plant in Spain (515.6 MW). Technically it is described as subcritical. Coal plants burn pulverised coal to raise high-pressure steam for a turbine; they run as baseload but are the most carbon-intensive mainstream source and the first targeted for retirement or efficiency retrofits.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Load factor

48%, from 4,270 GWh of reported generation; the median for 12 coal plants in Spain that report generation is 51%

Share of Spain coal capacity

8.1% of 12,360 MW across 24 plants in this dataset

Age among peers

12 of 23 dated coal plants in Spain are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Capacity vs largest coal plants in Spain

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by ENDESA GENERACION S.A.. All plants by this company →

Local climate & thermal context

This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a warm-summer Mediterranean climate (Köppen Csb) — Northern Hemisphere, latitude 42.6°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 13% 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: 57/100 — 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 #4 largest coal power plant of 24 in Spain by capacity.

Spain has 24 coal power plants in this dataset, together about 12,360 MW of capacity.

Nearby power plants

• Cubillos del Sil power station · Biomass · 50 MW · Castille and Leon
• P. E. EL REDONDAL (2 FASE 28/3/05) · Wind · 30.6 MW · Castille and Leon
• CORBERA · Wind · 49.2 MW · Castille and Leon
• LAS ONDINAS GR 1 · Hydro · 82.5 MW · Castille and Leon
• ANLLARES GR 1 · Coal · 346.8 MW · Castille and Leon
• CORNATEL GR 1 · Hydro · 130.7 MW · Galicia

Location

Coordinates 42.6125, -6.5647 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions