Ruzin Pumped Storage Hydroelectric Power plant Slovakia

Ruzin Pumped Storage Hydroelectric Power plant Slovakia is a 60 MW hydro power plant in Kosicky, Slovakia. It is operated by EP Slovakia BV [33%]; Enel SpA [33%]; Slovak Republic [34%]. Based on its capacity (estimated), it can supply roughly 60k homes (estimated). It ranks #17 of 37 Slovakia power plants by installed capacity. Commissioned in 1972, it is around 54 years old — an older, legacy facility. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 10.9% of Slovakia's electricity; the national grid averages 95 gCO₂/kWh (85.2% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id GEODB0042646.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100001023211; fuel: WRI GPPD

In context: how this plant compares

At 60 MW, Ruzin Pumped Storage Hydroelectric Power plant Slovakia is well above the median hydro plant in Slovakia (38.4 MW). Technically it is described as pumped storage. Hydropower converts the energy of falling or flowing water into electricity; output depends on rainfall and reservoir level, and large dams also provide grid balancing and storage.

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

Key facts

Share of Slovakia hydro capacity

2.6% of 2,320 MW across 21 plants in this dataset

Age among peers

3 of 8 dated hydro plants in Slovakia are older

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

Capacity vs largest hydro plants in Slovakia

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

Owner

Operated by EP Slovakia BV [33%]; Enel SpA [33%]; Slovak Republic [34%].

Local climate & thermal context

This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 48.9°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 43% 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: 76/100 — this site sits in the top 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 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 #6 largest hydro power plant of 21 in Slovakia by capacity.

Slovakia has 21 hydro power plants in this dataset, together about 2,320 MW of capacity.

Nearby power plants

• Kosice power station · Gas · 37.2 MW · Košice
• U.S. Steel Kosice Works power station · Coal · 208 MW · Košice
• Trebisov power station · Coal · 885 MW · Košice
• Vojany (EVO) Thermal Power Plant Slovakia · Coal · 880 MW · Kosicky
• Borsodchem power station · Gas · 100 MW · Berente
• Sromowice Wyżne · Hydro · 2 MW · Lesser Poland Voivodeship

Location

Coordinates 48.8616, 21.0911 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions