South Africa’s electricity grid is stabilizing as Eskom reduces diesel reliance significantly.
For the financial year to date, Eskom’s diesel expenditure is R9.25 billion lower than last year, marking a 59.11% reduction. Diesel contributed only 2.32 GWh to the grid last week, supplying just 0.41% of the weekly load.
Eskom’s Diesel Dependence Declines Sharply
Eskom’s improvements in power generation are easing the pressure on South Africa’s electricity grid. Diesel usage has consistently declined month-on-month since May 2025. The utility reported that year-to-date generation from open-cycle gas turbines totals 1 077.55 GWh at a diesel cost of R6.395 billion, compared to 2 608.82 GWh at R15.64 billion during the same period last year.
This reduction in diesel use reflects broader operational enhancements within Eskom. The Energy Availability Factor (EAF) remains above 65%, with 83 instances of generation achieving or exceeding 70% EAF this financial year.
Metrics on South Africa’s Diesel Expenditure
- R9.25 billion lower diesel expenditure
- 59.11% reduction in diesel costs
- 2.32 GWh contributed by diesel last week
- R13.19 million cost for diesel last week
- 1 077.55 GWh generation from OCGT this year
- R6.395 billion diesel cost for OCGT
- 308 consecutive days without supply interruptions
- 10 739 MW average unplanned outages
- 22.19% Unplanned Capacity Loss Factor
Context of Eskom’s Operational Improvements
The reduction in diesel reliance is part of Eskom’s broader strategy to enhance grid stability. The utility has achieved only 26 hours of loadshedding recorded in April and May 2025. These operational improvements have led to a more reliable electricity supply for South Africans.
Next Steps for Eskom’s Energy Strategy
- Bring 2 985 MW of generation capacity online by March 23
- Continue phased programme to eliminate load reduction
- Implement smart meter rollouts
- Maintain Free Basic Electricity support
South Africa is making strides towards a more sustainable energy future with reduced diesel dependence.
