Cubillos del Sil power station is a 50 MW biomass power plant in Castille and Leon, Spain. It is operated by Fuerzas Energéticas del Sur de Europa I SL. Based on its capacity (estimated), it can supply roughly 68,828 homes (estimated). It ranks #218 of 872 Spain power plants by installed capacity. In context, biomass supplies about 2.2% 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 CT-317.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Fuerzas Energéticas del Sur de Europa I SL.
This biomass plant burns organic material (wood, residues) to raise steam for a turbine. 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.
In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.
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.
The #2 largest biomass power plant of 9 in Spain by capacity.
Spain has 9 biomass power plants in this dataset, together about 337 MW of capacity.
Coordinates 42.6235, -6.5685 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
