In a significant stride for South Africa’s energy transition, the Vunumoya transmission station—a critical piece of infrastructure linking one of the country’s largest upcoming renewable energy complexes to the national grid—was formally handed over to state-owned power utility Eskom this week.
The station was built in just 17 months by Seriti Green, a subsidiary of the major coal mining company Seriti, as part of its Ummbila Emoyeni wind and solar project. Eskom will now own and operate the station for the next 50 years.
“The collaboration between Eskom and Seriti Green is one of the major achievements that’s coming out of this project,” a project spokesperson said. “This says to us that we can, working together, deliver a project of this magnitude with renewable energy that will take us into the future.”
The handover comes at a pivotal time. While prolonged rotational power cuts have recently been suspended, experts estimate around $25 billion is needed to upgrade South Africa’s aging and constrained electricity transmission network. The Vunumoya station, already operational, represents a direct investment in that grid infrastructure.
“This is a piece of infrastructure that will be around for 50 years,” the spokesperson added. “Many more renewable energy projects of Seriti Green are going to connect here.”
By 2027, the station is slated to channel almost one gigawatt of power from the Ummbila Emoyeni project into the grid. The development is taking shape as one of South Africa’s largest green energy hubs, notable for its location in the coal-intensive province of Mpumalanga, which currently feeds the majority of the nation’s coal-fired power stations.
The project’s siting in the heart of the country’s coal belt is presented as a strategic demonstration of a just energy transition. “This demonstrates that it is possible to harness renewable energy also in the Mpumalanga areas,” a spokesperson for the initiative stated. “Which then leads to quite a blend of energy technology mixes in this area that helps to preserve jobs and at the same time contributes towards the reduction of emissions levels.”
The project is also framed as a blueprint for future public-private partnerships. South Africa plans to build 14,000 kilometers of new transmission lines to connect over 100 gigawatts of mostly renewable energy to the grid by 2039, a goal heavily reliant on private investment.
Eskom officials indicated that Vunumoya is a model for what lies ahead. “You’re going to see a number of these kinds of substations also coming up as part of this whole Transmission Development Plan roll-out,” an Eskom representative said, noting similar infrastructure is planned for the Northern Cape and North West provinces.
The broader impact of such projects is expected to extend beyond South Africa’s borders. Proponents argue that boosting generation capacity will not only stabilize the domestic supply but also enable increased electricity exports, supporting a continental effort to bring power to an estimated 600 million people in Africa currently living without access.