Africa’s Energy Transition: When Generation Meets a Transmission Bottleneck
The continent’s push for cleaner power is gaining momentum, yet analysts warn that the real obstacle is no longer just building more solar panels or wind farms. As new generation capacity comes online, the ability to move that electricity efficiently across regions is becoming the limiting factor.
Tokollo Tau, Principal: Power and Renewables Finance at Nedbank Corporate and Investment Banking, notes that while most discussions focus on financing gaps and slow renewable roll‑out, the transmission network is increasingly the choke point that determines whether clean power can reach factories, mines and homes.
The Generation‑Transmission Gap
Across Sub‑Saharan Africa, installed generation capacity has risen steadily, but the continent still struggles with low electrification rates. According to the World Bank, only 43 % of the population had access to electricity in 2022, and transmission losses average between 10 % and 15 % in many national grids—far higher than the global average of around 8 %.
When surplus solar power is produced in South Africa’s Northern Cape or excess hydropower flows from Zambia’s Kariba Dam, the existing transmission corridors often cannot carry the bulk of that energy to demand centres. This mismatch forces countries to rely on expensive backup solutions such as diesel generators or gas‑fired peaking plants, undermining the cost advantages of renewables.
Regional Integration Remains Underutilized
Regional power pools were created precisely to address this kind of fragmentation. The Southern African Power Pool (SAPP), West African Power Pool (WAPP) and Eastern Africa Power Pool (EAPP) allow member states to trade electricity, share reserves and smooth out variability from renewable sources.
Yet, cross‑border transmission capacity remains limited. For example:
- The SAPP’s total transfer capacity between South Africa and Zambia is under 500 MW, far below the potential exchange of several gigawatts given each country’s resource base.
- In the WAPP corridor between Côte d’Ivoire and Ghana, only two 225 kV lines operate, constraining the flow of excess solar from Burkina Faso to coastal load centres.
- The EAPP’s link between Ethiopia and Kenya, while operational, operates at less than 60 % of its designed capacity due to right‑of‑way and permitting delays.
These bottlenecks increase the need for duplicate reserve capacity, raise system costs and deter investors who seek predictable, low‑risk returns.
Why Stronger Pools Matter
When transmission links are robust, regional pools deliver several concrete benefits:
- They reduce the need for each country to over‑build reserve margin, saving billions in capital expenditure.
- They improve grid stability as renewable output fluctuates, allowing excess solar in Namibia to offset a wind lull in Kenya.
- They create transparent price signals that attract private capital by lowering offtake risk and enhancing project bankability.
The African Development Bank estimates that fully exploiting existing power‑pool agreements could cut the region’s average electricity cost by up to 12 % by 2030.
Why Transmission Projects Are Different
Building a solar farm is a relatively straightforward financing exercise: secure land, obtain permits, erect panels and connect to the nearest substation. A transmission line, however, is a far more complex undertaking.
It must:
- Cross dozens of private properties, often requiring intricate easement negotiations.
- Navigate multiple jurisdictions, each with its own regulatory framework and permitting timelines.
- Traverse international borders, where a shift in government policy can instantly affect revenue streams and debt service obligations.
As Tau observes, “When a border crosses two countries, changing a government’s stance can jeopardize both the flow of power and debt service.” This statement underscores the political risk inherent in long‑haul transmission assets, which typically have investment horizons of 40‑50 years—double the useful life of most generation projects.
Financing such projects therefore relies on a layered capital structure. Development finance institutions (DFIs) provide the sovereign relationships and long‑term patience needed for early‑stage development, while commercial banks bring the structuring discipline that makes the debt marketable at scale.
From Agreement to Execution
Despite the hurdles, momentum is building. South Africa’s ongoing energy liberalisation has welcomed independent power producers (IPPs) who are now looking beyond national borders for off‑take opportunities. Innovative contract models, such as rolling frames that let generators and end‑users deal directly with the grid as a carrier, are simplifying cross‑border transactions.
Real‑world examples illustrate the potential:
- GreenCo, a Zambian renewable‑energy broker, has successfully matched solar generators with mining clients, cutting negotiation timelines from months to weeks.
- Solar Century, a UK‑based developer, has anchored its regional strategy to the SAPP, actively seeking European investment for transmission‑linked solar parks in Botswana and Namibia.
The consensus among industry leaders is clear: the question is no longer whether regional integration is necessary, but how quickly the continent can move from signed memoranda of understanding to shovels in the ground.
Energy, transport, logistics and industrial development are intertwined components of Africa’s growth equation. Institutions that recognise these linkages—such as multilateral development banks, regional power pools and forward‑looking commercial lenders—are best positioned to unlock the capital needed for large‑scale transmission upgrades.
Looking Ahead: Africa Energy Forum 2026
The upcoming Africa Energy Forum 2026 in Cape Town (June 16‑19) will feature dedicated sessions on transmission infrastructure, regional market design and innovative financing mechanisms. Stakeholders from government, utilities, the private sector and civil society will have a platform to share best practices, showcase pilot projects and negotiate the concrete steps required to turn today’s agreements into tomorrow’s power flows.
By addressing the transmission bottleneck head‑on, Africa can ensure that the clean energy it generates reaches the industries and communities that need it most—laying the foundation for a competitive, resilient and low‑carbon future.
