Renewable energy: Projects
Advancing wind energy in Mpumalanga
South African renewable energy company Seriti Green, announced in mid-October 2025 that it had achieved financial close and started construction on the third phase of its flagship Ummbila Emoyeni wind farm in Mpumalanga. Once complete the project will deliver over 900 megawatts (MW) of renewable energy capacity across seven phases. The company has already installed 25 wind turbines near Bethal, Davel and Morgenzon. Most recently, on 26 November 2025, Seriti Green, together with Eskom and its subsidiary, the National Transmission Company South Africa (NTCSA), celebrated the formal handover of the Vunumoya Main Transmission Station (MTS) by Seriti Green to Eskom. With an investment value of more than R1 billion and delivered over 18 months, the MTS represents a major grid-enabling asset that will support one of South Africa’s largest renewable energy developments. The handover confirms that the Vunumoya MTS is fully energised, operational and integrated into the national grid. This will enable the first 155 MW of wind energy from Seriti Green’s Ummbila Emoyeni One Wind Energy Facility to be fed into the system ahead of schedule (initially planned for early 2026) and marks a significant milestone in the rollout of the overall 900 MW programme, which will see new renewable energy capacity progressively added to the grid. Ongoing construction The start of construction on Phase 3 of Ummbila Emoyeni signals further progress in South Africa’s Just Energy
Transition (JET), with Seriti Green leading delivery at scale from the heart of the country’s traditional coal mining region. With turbines in the ground and thousands of people gaining skills and employment, this is the Just Energy Transition in action. Seriti Green has successfully closed three phases, each 155 MW (a total of 465 MW) within two years: the first phase reached financial close in 2024 and the second in August 2025. Peter Venn, CEO of Seriti Green, said: “Wind power in Mpumalanga was once thought impossible. Today, it is a reality. The Just Energy Transition must deliver – and we are playing our part.” Seriti Green, Eskom, NTCSA and representatives of the Gert Sibande District Municipality in November celebrated the handover of the newly built Vunumoya Main Transmission Station.
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Construction on Phase 1 of Ummbila Emoyeni is nearing completion. The project overall will deliver more than 900 MW of renewable energy capacity across seven phases including wind, solar and battery energy storage facilities.
18 Electricity + Control DEC 2025 - JAN 2026
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