South Africa Fast-Tracks 4,600 MW of Battery Storage to Beat Grid Curtailment

South Africa’s Minister of Electricity and Energy, Kgosientsho Ramokgopa, has issued a new determination ordering the immediate procurement of 4,600 megawatts of battery energy storage, compressing into a single round a volume the government’s 2025 Integrated Resource Plan had originally planned to phase in through 2030. The determination, published on 7 October 2026, pairs the batteries with 5,000 MW of gas-to-power capacity, for 9,600 MW of new generation and storage combined.

A grid problem that has flipped

For more than a decade, South Africa’s energy story was one of shortage: state utility Eskom imposed rolling blackouts, known locally as load shedding, as ageing coal plants broke down faster than new capacity could replace them. The rationale behind this determination points to a different, newer problem. According to ESI-Africa, Ramokgopa framed the battery push as a way to stop surplus renewable output — largely midday solar — from destabilising the grid. Batteries would charge during those surplus periods and discharge during the evening peak, smoothing a daily swing that has become sharper as more solar and wind capacity has connected.

What the determination specifies — and what it still doesn’t

The Independent Power Producer Office (IPPO) will run the procurement round, open to any market participant, including Eskom itself, Business Day and Green Building Africa reported. Storage bids will carry availability and performance obligations tied to the system operator’s charging and discharge requirements, rather than simply a capacity payment. One detail is conspicuously absent: Polity.org.za noted that the determination gives no energy-storage figure in megawatt-hours, so the discharge duration of the planned 4,600 MW fleet — whether built around two-hour batteries, four-hour batteries, or a mix — is still unspecified. New utility-scale wind and solar capacity was not included in this determination and will reportedly be addressed in a later one.

Ramokgopa is expected to announce a further procurement round, described as “Power Parks,” before the end of the calendar year, according to ESI-Africa, and the IPPO is aiming to complete the battery and gas procurement before the end of its financial year. Localisation thresholds for domestic manufacturing content, a feature of South Africa’s renewable-energy tenders since the REIPPPP programme, are expected to build on rules set in the country’s first dedicated battery storage bid window.

A much larger round than South Africa’s earlier battery tenders

The scale puts the new round well above anything South Africa’s battery program has procured to date. Bid Window 1 of the Battery Energy Storage IPP Procurement Programme, launched in 2023, targeted up to 513 MW and at least 2,052 MWh across five Northern Cape substations; the energy ministry named four preferred bidders for that window in November 2023. A third window, opened in 2024, targeted 616 MW and 2,464 MWh across Free State sites and drew 33 bids from 28 companies, according to ESS News. At 4,600 MW, the new determination is roughly seven to nine times the size of a single prior window — though, as with those earlier rounds, a determination sets a procurement target, not contracted or built capacity.

The storage push also runs alongside a broader regional pattern of using batteries and grid upgrades to absorb fast-growing renewable output; India approved a $19 billion plan this year to clear transmission bottlenecks for 135 GW of renewables, and forecasters such as DNV expect solar to become the world’s largest power source by 2031, intensifying pressure on grids built for a different generation mix.

What to watch next

The determination is a procurement instruction, not a signed contract: timelines, the MWh duration of the battery fleet, and the localisation rules that will shape which manufacturers can compete are all still to be published by the IPPO. Until bid documents appear, exact tender dates and final volumes should be treated as provisional.

Sources

• South African government gazette/determination under IRP2025, summarized by Polity.org.za, “New determination opens way for public procurement of large-scale battery storage and gas-to-power,” 7 October 2026 (official determination, MW figures, no MWh disclosed) — polity.org.za
• ESI-Africa, “South Africa front-loads 4,600MW of battery storage to beat curtailment,” 7 October 2026 (curtailment rationale, Power Parks timeline) — esi-africa.com
• Business Day, “South Africa to add 9,600MW in gas power and battery energy storage,” 8 October 2026 (pairing of BESS and gas volumes) — businessday.co.za
• South African Government News Agency (SAnews) and gov.za, Battery Energy Storage IPP Procurement Programme Bid Window 1 announcement, 30 November 2023 (background on earlier, smaller bid windows) — sanews.gov.za

Illustrative image. Photo: Kecko from Eastern Switzerland, CC BY 2.0, via Wikimedia Commons — source