After months of tighter operating discipline and a focus on planned maintenance, South Africa’s state power utility Eskom reported a marked step-up in reliability: the daily energy availability factor (EAF) reached 82.04 percent on 31 July 2026, the highest single-day reading since 2017, while unplanned outages fell to their lowest daily level in eight years.
The figures point to a stretch of stronger system performance across Eskom’s fleet, signalling fewer last-minute breakdowns and more generating units available when needed. A higher energy availability factor means a larger share of installed capacity is ready to produce electricity, a critical buffer during winter demand and a prerequisite for reducing the risk of rotational power cuts.
While a standout day does not settle the longer-term picture, the combination of elevated availability and fewer surprise failures suggests maintenance reforms and operating practices are gaining traction. If this pattern holds over weeks and months, it could ease pressure on emergency generation and diesel use, support steadier supply for industry and households, and create room for more planned maintenance without triggering shortages.
The next test is durability: watch the weekly and monthly energy availability factor, the trajectory of unplanned breakdowns through the late-winter peak, and whether Eskom can sustain higher availability as planned maintenance shifts into spring. Consistency across these measures will determine whether July’s high-water mark becomes the norm rather than the exception.
For more detail, read the full announcement.