Komati Power Station — South Africa

Komati Power Station is a 990 MW coal power station in Mpumalanga, South Africa. It is operated by Eskom. Based on its capacity (estimated), it can supply roughly 1.2 million homes (estimated). It ranks #30 of 152 South Africa power plants by installed capacity. Commissioned in 1963, it is around 63 years old — an older, legacy facility. In context, coal supplies about 81.4% of South Africa's electricity; the national grid averages 699 gCO₂/kWh (17.8% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000126.

Data provenance

Source of the capacity and fuel values:

capacity: Wikidata P2109; fuel: WRI GPPD

In context: how this plant compares

At 990 MW, Komati Power Station is below the median coal plant in South Africa (1,180 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

Share of South Africa coal capacity

1.5% of 67,847 MW across 37 plants in this dataset

Age among peers

1 of 18 dated coal plants in South Africa is 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 South Africa

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

Owner

Operated by Eskom. 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 subtropical highland climate (Köppen Cwb) — Southern Hemisphere, latitude 26.1°S — which shapes how much energy it can produce and how its output varies through the year.

Monthly mean temperature

Heating degree-days here run 48% below 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: 30/100 — this site sits in the bottom 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 #21 largest coal power plant of 37 in South Africa by capacity.

South Africa has 37 coal power plants in this dataset, together about 67,847 MW of capacity.

Nearby power plants

• Hendrina power station · Coal · 2,000 MW · Mpumalanga
• Duvha power station · Coal · 3,000 MW · Mpumalanga
• Umbani power station · Coal · 600 MW · Mpumalanga
• Kriel power station · Coal · 3,000 MW · Mpumalanga
• Arnot power station · Coal · 2,352 MW · Mpumalanga
• Matla power station · Coal · 3,600 MW · Mpumalanga

Location

Coordinates -26.0899, 29.4725 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions