SolarAfrica’s 342 MW SunCentral Milestone Shows Private Power Is Rewriting South Africa’s Grid

SolarAfrica’s completion of financial close across the first 342 MW phase of its SunCentral development is more than another renewable-energy milestone. It shows how private power, grid wheeling and commercial demand are beginning to reshape South Africa’s electricity market from the customer side.

Africa.com reported on September 1 that SolarAfrica has reached financial close on SunCentral 3, the third and final 114 MW facility in Phase 1 of the company’s flagship utility-scale solar development. The first phase now totals 342 MW, with funding for the latest facility provided by RMB and Investec Bank. Engineering News previously reported the same milestone on August 19, noting that the first 114 MW facility is expected to come online in the second half of 2026.

SunCentral is located between Hanover and De Aar in the Northern Cape. At full scale, SolarAfrica says the project could deliver up to 1 GW of renewable-energy capacity. That is a large number, but the more important feature is the business model. SunCentral is designed for one-to-many wheeling, meaning electricity generated at the plant can be fed through the national grid and supplied to multiple commercial and industrial customers rather than one dedicated off-taker.

Why wheeling matters

Wheeling is a technical term with large economic consequences. It allows electricity generated in one location to be transported across the grid and allocated contractually to a customer somewhere else. For South African businesses, this creates a way to buy renewable electricity without owning a solar plant on their own premises or depending entirely on their local municipal supply.

The model matters because many South African companies face three linked problems: electricity reliability, rising tariffs and pressure to reduce carbon emissions. Rooftop solar can help some firms, but many businesses do not have enough roof space, have complex load profiles or need more power than on-site systems can supply. A utility-scale wheeling project can aggregate demand from many customers and produce power where solar conditions are strong.

SolarAfrica says it predominantly serves the commercial and industrial sector, including customers in automotive, mining, data centres, manufacturing, retail and corporate parks. These are exactly the sectors that need predictable electricity to remain competitive. If wheeling works at scale, it can give firms cleaner supply options while reducing the need for each company to solve energy security alone.

A private answer to a public problem

South Africa’s electricity crisis has forced companies to become energy strategists. Years of load shedding, ageing infrastructure and tariff pressure pushed firms toward generators, rooftop solar, batteries and power-purchase agreements. Eskom’s recent operational improvement has reduced the emergency pressure, but the deeper market shift remains. Businesses want cost certainty and supply options.

SunCentral fits that shift. SolarAfrica chief executive David McDonald said the completion of financial close across Phase 1 brings the company closer to supplying businesses with affordable, clean energy at scale. He also framed the project as part of the growing role wheeling will play in South Africa’s energy future. That is not exaggerated. Wheeling is one of the mechanisms that can unlock private generation without requiring every project to be physically next to its customer.

But this is not a replacement for public grid reform. It depends on the grid. A wheeling project needs transmission capacity, metering, settlement systems, grid codes, municipal cooperation and a functioning national transmission company. Private generation can reduce pressure on Eskom’s generation fleet, but it cannot bypass the need for strong network infrastructure.

The substation is strategically important

SolarAfrica has also completed the project’s main transmission substation, a R1.35 billion investment that will connect SunCentral’s renewable output to the national grid. Africa.com reported that the substation will be handed over to the National Transmission Company South Africa and will form part of the transmission infrastructure required to connect new renewable generation.

This detail deserves attention because grid connection is now one of South Africa’s biggest renewable-energy bottlenecks. The country has excellent solar and wind resources, but the best renewable zones are not always close to existing grid capacity. Projects can be ready commercially and still wait for network capacity. A dedicated transmission substation helps solve one part of that problem.

The Northern Cape has become central to South Africa’s renewable-energy future because of its solar resource and land availability. But generation without evacuation capacity is stranded potential. The SunCentral substation therefore matters not only for one developer, but for the broader shift toward private and utility-scale renewable power.

Finance shows market confidence

The financing also sends a signal. RMB and Investec’s backing of SunCentral 3 completes the development and financing pathway for the first 342 MW phase. Engineering News reported that financial close for SunCentral 1, 2 and 3 was achieved over an 18-month period. That pace suggests lenders are becoming more comfortable with the wheeling model, provided the project structure, customers and grid arrangements are credible.

South Africa needs that confidence. Renewable-energy projects require large upfront capital, long contracts and confidence in regulation. If banks view one-to-many wheeling as bankable, more projects can move from concept to construction. If they see too much settlement, grid or municipal risk, financing will remain slower and more expensive.

For African energy markets more broadly, this is a relevant lesson. Private capital will follow demand, but only when the rules are workable. Wheeling, open access and bankable power-purchase structures can unlock generation capacity faster than state procurement alone. Poorly defined rules, however, can trap projects in legal and administrative uncertainty.

Battery storage is the next phase

SolarAfrica says future phases of SunCentral are expected to combine utility-scale solar generation with battery energy storage systems. McDonald described hybrid solar and storage as the next evolution of utility-scale wheeling because it can move renewable electricity into periods when demand and costs are typically higher.

This is important because solar’s value changes as more midday generation enters the grid. Without storage, large amounts of solar power can create concentration during daylight hours while evening demand remains dependent on other sources. Batteries can help shift supply, reduce peaks, provide more reliable green-energy products and improve grid balance.

For commercial and industrial customers, storage can make renewable contracts more useful. A factory, mine or data centre cannot run only when the sun is strongest. It needs energy certainty across the day. Hybrid projects can provide a larger share of usable renewable electricity, though costs, battery duration and contract design remain critical.

The market is not risk-free

SunCentral’s progress does not remove the risks around South Africa’s power transition. Grid capacity is constrained. Municipal wheeling frameworks remain uneven. Tariff structures are changing. Eskom and the National Transmission Company South Africa must coordinate with private generators and customers. Businesses want cheaper power, but projects must recover capital and manage construction, performance and curtailment risk.

There is also a fairness question. Large commercial customers can negotiate renewable supply and hedge against rising costs. Smaller businesses and households may remain tied to weak municipal systems or high tariffs. If the best-paying customers leave or reduce municipal purchases without tariff reform, local-government electricity revenue can weaken further. That can affect public services and poorer users.

The answer is not to block private wheeling. The answer is to update the market design. South Africa needs transparent network charges, clear municipal rules, protection for vulnerable users, and incentives for investment in distribution and transmission. Private power should strengthen the system, not create a two-tier electricity market.

A model for African power reform

Across Africa, countries are trying to expand electricity supply while managing constrained public finances and rising climate pressure. Many utilities cannot build enough generation or grid capacity alone. Private power is essential, but it must be integrated properly.

SunCentral offers a model worth studying because it links utility-scale renewable generation to multiple business customers through the national grid. This is different from isolated corporate solar or off-grid systems. It uses the grid as a platform for cleaner power transactions. That is the direction many African markets will need to move if they want more generation without relying only on public procurement.

The model will not copy perfectly everywhere. It requires grid capacity, credible metering, enforceable contracts, solvent off-takers and supportive regulation. But the principle is transferable: private generators and customers can help finance new power when the network rules allow electricity to move efficiently.

The bottom line

SolarAfrica’s 342 MW Phase 1 milestone is important because it moves South Africa’s wheeling market from theory into large-scale delivery. The project is designed to serve multiple commercial and industrial customers, connect through national transmission infrastructure and eventually scale toward 1 GW with potential battery storage in future phases.

For businesses, it offers a route to cleaner and more predictable power. For the grid, it adds capacity and tests new transaction models. For policymakers, it raises urgent questions about network charges, municipal revenue, storage, grid expansion and fairness.

South Africa’s electricity future will not be rebuilt by Eskom alone or by private developers alone. It will depend on whether public networks can become platforms for investment, competition and cleaner energy. SunCentral shows that the private side is ready to move. The next test is whether the grid and regulatory system can keep pace.

Sources

• Africa.com – SolarAfrica completes first 342 MW phase of flagship wheeling project, 1 September 2026
• Engineering News – SolarAfrica completes 342 MW Phase 1 of SunCentral project, 19 August 2026
• Engineering News – SunCentral reaches major delivery milestones at Northern Cape project, 27 August 2026
• SolarAfrica – energy wheeling strategy for business cost savings
• SolarAfrica – SunCentral solar farm construction background