The Western Cape has identified a R37,4 billion renewable energy investment opportunity to 2030 with grid curtailment expected to unlock a significant portion of new wind capacity.
The Western Cape Department of Environmental Affairs and Development Planning’s latest Renewable Energy Market Intelligence Report outlines a total pipeline comprising large-scale wind, utility-scale solar photovoltaic (PV) for wheeling and behind-the-meter (BTM) installations.
The report indicates that large-scale wind accounts for the bulk of the opportunity with up to 1 856 MW of capacity valued at R31,6 billion. Utility-scale solar PV for wheeling represents a further 250 MW (R2,5 billion) while BTM solar PV for commercial and industrial users is estimated at 240 MW (R3,3 billion).
A key enabler identified in the report is the approval by the National Energy Regulator of South Africa of 4% congestion curtailment in September 2025. According to the report, this measure is expected to unlock 1 180 MW of wind projects, representing R20,1 billion in potential investment.
“The renewable energy market continues its growth trajectory, affording opportunities for private-sector offtakers to mitigate Eskom tariff escalations and to meet decarbonisation goals,” said Jo-Anne September, Chief Director: Energy in the Western Cape Energy Resilience Programme.
The report notes resilience in the BTM segment with solar PV and battery energy storage systems projected to sustain a R3,3 billion market to 2030, driven by tariff increases and corporate decarbonisation requirements.
However, projects above 1 MW face compliance-related costs that can increase capital expenditure by up to R4 million, equivalent to as much as 40% of total project costs, affecting financial viability.
The report identified transmission upgrades on the Cape Corridor (2028-2031) as the next major capacity release.
