Sostanj power station is a 84 MW gas power plant in Šoštanj, Slovenia. It is operated by Termoelektrarna Šoštanj doo [100%]. Based on its capacity (estimated), it can supply roughly 95k homes (estimated). It ranks #10 of 10 Slovenia power plants by installed capacity. Commissioned in 2008, it is around 18 years old — relatively modern. In context, gas supplies about 6.4% of Slovenia's electricity; the national grid averages 183 gCO₂/kWh (78.9% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GOGPT_sostanj_sloven.
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: GEM GOGPT; fuel: GEM GOGPT
In context: how this plant compares
Technically it is described as OCGT. Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Share of Slovenia gas capacity
- 15.7% of 535 MW across 3 plants in this dataset
- Age among peers
- 1 of 3 dated gas plants in Slovenia is older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest gas plants in Slovenia
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Termoelektrarna Šoštanj doo [100%].
Local climate & thermal context
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 46.4°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 33% 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: 70/100 — this site sits in the top third of the power plants we cover by heating degree-days.
A gas turbine here also runs ~0% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).
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 mild atmospheric environment (estimated ISO 9223 class C2 — Low), 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 #3 largest gas power plant of 3 in Slovenia by capacity.
Slovenia has 3 gas power plants in this dataset, together about 535 MW of capacity.
Nearby power plants
- Sostanj (TEŠ) · Coal · 1,029 MW · Sostanj
- TET · Coal · 110 MW · Hrastnik
- Schwabeck · Hydro · 79 MW · Carinthia
- St Andrae power station · Coal · 192 MW · Carinthia
- Energetika Ljubljana · Coal · 112 MW · Ljubljana
- Te-Tol power station · Gas · 114 MW · Ljubljana
Location
Coordinates 46.3723, 15.0534 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Sostanj power station?
Sostanj power station is a 84 MW gas power plant in Šoštanj, Slovenia, commissioned in 2008.
Who operates Sostanj power station?
Sostanj power station is operated by Termoelektrarna Šoštanj doo [100%].