Eskom Data Portal · Actual Generation · May 2025 – May 2026
Open Cycle Gas Turbine (OCGT) Generation
Eskom OCGT + Dispatchable IPP OCGT · Hourly actual dispatch · Last 12 months
1,567 GWhTotal OCGT energy generated
(Eskom + IPP, 12 months)
(Eskom + IPP, 12 months)
462 GWhEskom OCGT only
(30% of total)
(30% of total)
1,105 GWhIPP OCGT
(70% of total)
(70% of total)
3,058 MWPeak combined dispatch
7 Jul 2025, 20:00
7 Jul 2025, 20:00
0.74%Avg OCGT as % of
residual demand (12m)
residual demand (12m)
Key finding: Eskom OCGT was dispatched heavily in May–Jul 2025 (winter onset, 397 GWh across 3 months) then almost completely stood down from August 2025 onwards — dropping to near-zero from Aug 2025 through Feb 2026. IPP OCGT ran continuously throughout at a near-constant ~100 MW baseload, suggesting a contracted minimum dispatch obligation. Eskom OCGT has resumed modest dispatch from March 2026 as winter approaches again.
Monthly OCGT Generation (GWh) · Eskom vs IPP
Eskom OCGT
IPP OCGT
Eskom OCGT dispatch hours (right axis)
Daily Average OCGT Output (MW)
Eskom OCGT
IPP OCGT
Hourly Dispatch Profile (avg MW by hour of day)
Eskom OCGT
IPP OCGT
Top 20 Peak Dispatch Events (by combined Eskom + IPP OCGT output)
| # | Date & Time | Eskom OCGT | IPP OCGT | Combined | % of Residual Demand | Season |
|---|
Data: Eskom Data Portal historical download (Apr 2022–May 2026) · OCGT columns: “Eskom OCGT Generation” and “Dispatchable IPP OCGT” · Each row represents one hourly interval · MW values are average sent-out generation for that hour · GWh calculated as sum of hourly MW / 1000
