New Transmission Station Boosts Renewable Energy Capacity in Mpumalanga
Mpumalanga, South Africa – November 27, 2025 - Seriti Green has officially transferred ownership of the Vunumoya Main Transmission Station (MTS) to Eskom and its subsidiary, the National Transmission Company South Africa (NTCSA), marking a significant step forward in expanding renewable energy integration within the region. The R1 billion+ project, completed in 18 months, is now fully operational and integrated into the national grid.
The Vunumoya MTS, a key component of the Ummbila Emoyeni renewable energy project, will begin delivering 155MW of power from Seriti Green’s Ummbila Emoyeni One Wind Energy Facility starting November 28th – ahead of the initially projected March 2026 timeline.
The handover ceremony was attended by key leaders including Seriti Group CEO Mike Teke, Seriti Green CEO Peter Venn, NTCSA CEO Monde Bala, and Eskom Group CEO Dan Marokane.
“This handover exemplifies the power of effective partnerships and represents a crucial milestone in South Africa’s energy transition and the revitalization of Mpumalanga as a burgeoning renewable energy hub,” stated Teke. “Seriti is proud to contribute to building the infrastructure necessary for a secure and sustainable national energy future.”
NTCSA CEO Monde Bala emphasized the station’s role in bolstering grid capacity and facilitating further renewable energy connections. “The vunumoya project directly supports our commitment to efficiently integrating renewable energy sources, strengthening grid reliability, and advancing South africa’s transition to a diversified, low-carbon energy mix.”
Designed with future scalability in mind, the Vunumoya MTS boasts the capacity to accommodate approximately 900MW of renewable energy through the addition of future feeders and transformers, paving the way for further renewable energy projects in the area.
Eskom Group CEO Dan Marokane lauded the project as a exhibition of collaborative innovation. “Achievements like Vunumoya are essential for modernizing our grid and ensuring a reliable, low-carbon power supply for generations to come.”
The Vunumoya MTS joins a growing trend of independent power producers investing in grid infrastructure to connect renewable energy to the national network, exemplified by Mainstream Renewable Power’s recently completed self-built substation for its Khobab and Loeriesfontein wind farms.
Despite the increased capacity provided by Vunumoya, challenges remain in connecting renewable energy projects to the grid, particularly in regions with limited existing infrastructure. The lack of transmission lines and substations continues to pose obstacles to integrating new renewable energy sources and maximizing energy output.
“This milestone underscores the impact of coordinated effort,” concluded Peter Venn, CEO of Seriti Green.
