South Africa Front-Loads 4,600 MW of Batteries as Daytime Power Goes to Waste

South Africa's electricity minister has turned a daytime surplus into a procurement order. On 7 October, Dr Kgosientsho Ramokgopa confirmed the first section 34 determination under the Integrated Resource Plan 2025: 4,600 MW of battery energy storage and 5,000 MW of gas-to-power, with no new wind or solar in this round. The combined 9,600 MW is meant to soak up power the grid cannot use at midday and deliver it when the evening peak arrives.

The shift would have sounded implausible three years ago, when load-shedding defined the politics of power. Eskom's generation recovery and a wave of private solar have left the system with average daytime surpluses above 4,000 MW, the minister said. The government statement of 7 October says the first determination answers immediate needs for storage, flexibility and dispatchable supply. A later determination will cover wind, solar, hybrids with storage and longer-term pumped storage. Procurement will be run by the Independent Power Producer Office and opened to all market participants, including Eskom, Engineering News reported.

Eskom is already prequalifying partners for a 6 GW green pipeline that includes 1,000 MW / 4,000 MWh of batteries. Ramokgopa told a Pretoria briefing that the ministry is taking the full IRP 2025 battery allocation now rather than phasing it to 2030, because the curtailment problem is already here. TechCentral quoted him saying the country is sitting with surplus electricity that represents a major risk, losing power and throwing money away. By June 2025, all five projects in the first battery storage bid window, 513 MW in total, had reached commercial close and entered construction with R15.4 billion of investment, according to the government statement.

Storage will need locations that can charge from surplus zones and discharge into load centres without recreating congestion. Industrial users are watching for a different signal: whether surplus can become interruptible or time-of-use products at prices that revive smelters, data centres and manufacturing loads mothballed during the load-shedding years.