South Africa’s energy sector is undergoing its most significant structural shift in decades. After years of Eskom operating as the sole buyer and seller of electricity in the country, a new era of competitive energy trading is on the horizon — and for commercial and industrial (C&I) businesses, understanding what this means for their energy strategy has never been more important.
The South African Wholesale Energy Market — known as SAWEM — is set to fundamentally change how electricity is bought, sold, and priced in South Africa. But as the market evolves, one question is emerging clearly in the minds of energy decision-makers: should my business wait for the wholesale market to develop, or invest in commercial solar now?
The short answer is that these are not competing choices. For most C&I businesses, commercial solar and wholesale market participation are complementary strategies — and understanding how they interact is key to building an energy model that delivers long-term cost certainty and competitive advantage.
What is SAWEM and Why Does It Matter?
For most of South Africa’s history, Eskom has operated as a vertically integrated monopoly — generating, transmitting, and selling electricity through a single-buyer model. Businesses had one option: buy from Eskom or their municipality, at whatever tariff was set.
SAWEM changes this fundamentally. The South African Wholesale Electricity Market introduces a competitive wholesale market that moves the country away from a single-buyer model dominated by Eskom, toward a more diversified, resilient, and investor-friendly system.
In practical terms, SAWEM creates an open platform where multiple generators — including private independent power producers (IPPs) — can sell electricity to multiple buyers, with pricing determined by market forces rather than regulated tariffs alone. This shift will set the scene for a wholesale market where generators can sell to multiple offtakers, and where licensed traders can compete on price and flexibility — ultimately unlocking more private investment, more competition, and lower prices.
For C&I businesses, this represents a meaningful expansion of energy choice. Rather than being locked into a single regulated tariff, businesses will increasingly be able to source competitively priced electricity from a range of private providers.
Where Does SAWEM Stand Right Now?
It is important to approach SAWEM with clear eyes. The market reform is real, the regulatory momentum is building, and the direction of travel is not in doubt — but the timeline for full market operability involves complexity that businesses should not underestimate.
While there has been a great deal of talk around SAWEM coupled with words such as “ready”, “milestones” and “imminent”, most private power activity in 2026 continues to sit outside that debate — projects are being financed and built using existing Eskom-approved structures, and businesses are not holding back waiting for a market that may or may not arrive on schedule.
This is the practical reality for most C&I businesses in 2026: the wholesale market is a compelling long-term development, but the tools that deliver energy cost certainty today — commercial solar PV, battery energy storage, and wheeled energy solutions — are available, proven, and delivering results right now.
Why Commercial Solar Remains the Foundation of Any Energy Strategy
Regardless of how SAWEM develops, commercial solar PV remains the most accessible, most financially compelling, and most strategically sound energy investment available to South African C&I businesses today.
Here is why solar’s value proposition is independent of wholesale market developments:
Solar generates electricity at a fixed, predictable cost. Once a commercial solar system is installed and commissioned, the cost of the energy it generates is effectively locked in for the life of the system — typically 25 years or more. No tariff announcements, no fuel price movements, and no wholesale market fluctuations can change that.
Solar reduces your grid dependency immediately. Every kilowatt-hour generated by your solar system is a kilowatt-hour you are not buying from Eskom or a municipality at an ever-increasing regulated tariff. This saving begins on day one of commissioning and compounds over the life of the asset.
Solar is a return-generating asset, not a cost centre. Unlike passive energy procurement — whether from the grid or a future wholesale market — a self-funded solar system generates a measurable financial return on the capital invested. That return improves retrospectively every time grid tariffs increase.
Solar creates an ideal foundation for wholesale market participation. As SAWEM matures and C&I businesses gain the ability to trade excess solar generation back into the market, businesses that have already invested in solar infrastructure will be best positioned to participate — and to benefit.
Explore SOLINK’s full range of commercial solar advisory services →
How Solar and the Wholesale Market Work Together
The most forward-thinking energy strategy for a C&I business in South Africa is not solar or the wholesale market — it is solar as the foundation of a broader energy model that increasingly incorporates wholesale market participation over time.
Here is how the two strategies are complementary:
Solar Reduces Your Consumption Exposure
By offsetting a significant portion of your grid electricity consumption with solar generation, you reduce the volume of electricity you need to procure — whether from Eskom, a municipality, or a future wholesale market. A smaller procurement volume means lower exposure to tariff volatility and wholesale price fluctuations.
Battery Storage Enables Market Flexibility
Pairing solar with a Battery Energy Storage System (BESS) adds a powerful layer of strategic flexibility. Battery storage allows your business to store solar-generated electricity for use during peak tariff periods — the times when grid electricity is most expensive, and when wholesale market prices are likely to be highest. This ability to shift consumption away from peak pricing windows will become increasingly valuable as time-of-use tariff structures evolve under SAWEM.
Wheeled Energy Extends Your Renewable Reach
For businesses whose on-site solar capacity cannot meet their full energy requirements, wheeled energy solutions allow you to procure renewable electricity generated off-site and delivered via the national grid. As SAWEM develops, the wheeled energy market is expected to deepen significantly — giving businesses access to a broader range of competitively priced renewable energy sources.
Learn about SOLINK’s wheeled energy and BESS advisory services →
The Risk of Waiting
Some businesses are adopting a wait-and-see approach — holding off on solar investment until the wholesale market is more fully developed, on the basis that SAWEM may deliver cheaper electricity in future.
This reasoning carries meaningful risk for several reasons.
Eskom tariffs continue to rise in the interim. Approved tariff increases for 2026/27 and 2027/28 are already in place. Every year of inaction on solar is a year of continued compounding grid tariff exposure — with no guarantee that wholesale market pricing will offset those increases once the market is operational.
Solar economics are compelling today. The cost of solar PV technology has fallen dramatically over the past decade, and commercial solar installations are currently delivering strong returns for C&I businesses across South Africa. Waiting does not improve the economics of solar — it simply delays the period over which those returns are realised.
Wholesale market participation will favour businesses that are already solar-equipped. The businesses best positioned to trade in a mature SAWEM environment will be those with existing generation assets, battery storage, and operational experience in renewable energy management — not those starting from zero.
According to Baringa’s South Africa Wholesale Electricity Market Report, the share of solar PV and wind in South Africa’s generation mix is projected to increase from around 15% in 2025 to 75% by 2050, while coal-fired generation falls significantly. Businesses that build solar infrastructure now are aligning with the direction the entire energy system is moving — not fighting against it.
What This Means for Your Energy Strategy in 2026
The most practical guidance for C&I energy decision-makers in 2026 is straightforward:
Do not wait for SAWEM to act on solar. The wholesale market is a positive long-term development for South Africa’s energy landscape, but it is not a reason to delay an investment that is delivering strong returns for businesses today.
Design your solar investment with the wholesale market in mind. Work with an independent technical advisor to size and structure your solar and BESS solution in a way that positions your business to participate in the evolving market — not just to offset current grid consumption.
Get independent advice on wheeled energy options. As the wholesale market develops, the range of wheeled energy solutions available to C&I businesses will expand. Understanding how these options integrate with your on-site solar strategy requires independent, unbiased guidance.
See how SOLINK has delivered commercial energy strategies for South Africa’s leading businesses →
Frequently Asked Questions
Q: What is SAWEM and when will it be operational? SAWEM — the South African Wholesale Energy Market — is a regulatory reform that will transition South Africa from a single-buyer electricity model dominated by Eskom to a competitive, open market where multiple generators and buyers can trade electricity. NERSA approved the country’s first market operator licence in late 2025, marking a significant milestone. However, full market operability is a multi-year process, and most C&I energy procurement continues to operate through existing channels in 2026.
Q: Will SAWEM make solar less valuable? No — if anything, SAWEM makes solar more valuable. As the wholesale market develops, businesses with existing solar generation assets and battery storage will be better positioned to trade excess generation, respond to price signals, and minimise their exposure to peak market pricing. Solar is the foundation of any forward-looking energy strategy, regardless of how the wholesale market evolves.
Q: Can my business participate in the wholesale electricity market? Participation in SAWEM will depend on your business’s scale, licensing status, and technical capability. Most C&I businesses will access wholesale market benefits indirectly — through licensed energy traders, brokers, and wheeled energy providers — rather than as direct market participants. An independent energy advisor can help you understand the options relevant to your business. Start your energy assessment via SOLINK Core →
Q: How does wheeled energy relate to the wholesale market? Wheeled energy allows businesses to procure renewable electricity generated off-site and delivered via the national transmission grid. As SAWEM develops, the wheeled energy market is expected to become more competitive and more accessible — expanding the range of renewable energy sources available to C&I businesses beyond what can be generated on-site. For more context on South Africa’s energy market reform, the Africa Energy Indaba provides regularly updated insights on SAWEM developments.
Build Your Energy Strategy for Today — and for What’s Coming
South Africa’s energy market is changing faster than at any point in the past two decades. The businesses that will be best positioned in a competitive wholesale market are the ones that are already building their renewable energy foundation today — with well-designed solar systems, independent procurement processes, and advisors who understand where the market is heading.
SOLINK’s independent engineers have facilitated commercial and industrial energy projects across South Africa — helping businesses make energy decisions that deliver returns today and remain strategically sound as the market evolves.
Ready to Build an Energy Strategy That Works Today and Tomorrow?
Talk to SOLINK’s independent team — no installer bias, no supplier agenda. Just expert advice on how solar, storage, and the evolving wholesale market can work together for your business.
SOLINK (Pty) Ltd | info@solink.co.za | Cape Town: 021 300 0485 | Johannesburg: 010 500 7675
