Dedisa power station — South Africa

Dedisa power station is a 335 MW oil power station in Eastern Cape, South Africa. It is operated by Dedisa Peaking Power (RF) Pty Ltd. Based on its capacity (estimated), it can supply roughly 252k homes (estimated). It ranks #50 of 152 South Africa power plants by installed capacity. Commissioned in 2015, it is around 11 years old — relatively modern. Its modelled annual emissions are 148,400 t CO₂/yr (Climate TRACE), equivalent to about 35k cars driven for a year. In context, oil supplies about 0.8% 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 CT-6240.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000407109; fuel: Climate TRACE

In context: how this plant compares

Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG). Oil-fired plants burn heavy fuel oil or diesel, usually as peaking or backup capacity on islands and grids without gas pipelines; high fuel cost keeps their utilisation low.

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

~148,400 t CO₂/yr (modelled) — in everyday terms

This facility's annual emissions are roughly equivalent to:

Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.

Key facts

Share of South Africa oil capacity

13.9% of 2,413 MW across 3 plants in this dataset

Age among peers

2 of 3 dated oil plants in South Africa are older

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

Capacity vs largest oil plants in South Africa

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

Owner

Operated by Dedisa Peaking Power (RF) Pty Ltd.

Local climate & thermal context

This oil plant burns oil or diesel to drive turbines or reciprocating engines. It sits in a humid subtropical climate (Köppen Cfa) — Southern Hemisphere, latitude 33.7°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 83% 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: 20/100 — 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 corrosive environment (estimated ISO 9223 class C4 — High), 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 oil power plant of 3 in South Africa by capacity.

South Africa has 3 oil power plants in this dataset, together about 2,413 MW of capacity.

Nearby power plants

• Coega power station · Gas · 3,000 MW · Eastern Cape
• Karpowership Coega power station · Gas · 450 MW · Eastern Cape
• Grassridge Wind Farm · Wind · 61.5 MW · Eastern Cape
• Coega IDZ Windfarm · Wind · 73.8 MW · Eastern Cape
• Van Stadens · Wind · 27 MW · Eastern Cape
• Jeffrey's Bay Wind Farm · Wind · 138 MW · Eastern Cape

Location

Coordinates -33.7437, 25.6728 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions