South Africa Has Wind But No Wires to Carry It

South Africa possesses abundant wind energy potential but lacks the necessary infrastructure to transmit this power. According to the country's Integrated Resource Plan 2025, the plan calls for approximately 105 gigawatts of new generation capacity and 14,500 kilometers of new transmission lines by 2039, requiring an investment of over R2.2 trillion (around US$137 billion). However, recent renewable procurement rounds have demonstrated that transmission capacity remains a significant bottleneck.

The latest renewable auction, Bid Window 7, awarded no onshore wind capacity against an allocation of 3.2 gigawatts due to insufficient transmission infrastructure in the windiest provinces. This shortage is particularly evident in the Eastern and Northern Cape, which have the best wind resources but are distant from the major industrial centers in Gauteng.

The existing power grid was primarily designed to transport coal-fired energy from Mpumalanga, making it unsuitable for efficiently transporting wind energy to these urban areas.

While the South African government has been actively courting international investment, including a delegation to Beijing in August, no Chinese funding commitments have been announced for the R2.2 trillion investment opportunity. The country's energy sector has a history of plans that have struggled to translate into actual infrastructure, with previous iterations of the IRP slipping and contributing to rolling blackouts in the past.

The recognition of transmission as the primary constraint represents a crucial shift in South Africa's energy planning. By focusing on building the necessary infrastructure, the plan aims to attract long-dated, regulated investments with predictable returns. The separation of the grid from the generator, with the establishment of the National Transmission Company South Africa, is a key step towards realizing this vision.

However, the nuclear component of the plan remains politically contentious, and despite previous plans for 5,200 megawatts of nuclear power, no nuclear reactors have been built so far. The IRP 2025 is intended as an investment opportunity rather than a complete pipeline, highlighting the ongoing need to build the infrastructure to support the renewable energy capacity mandated by the plan.