For most South African businesses, the decision to invest in solar energy is no longer a question of whether— it’s a question of how to implement, to realize savings as soon as possible. With Eskom tariffs having increased by more than 190% since 2014 and further approved hikes already locked in for 2026 and 2027, the financial case for commercial solar has never been stronger.
But the financing landscape can be just as complex as the technology itself. Self-funded, leased, or structured through a Power Purchase Agreement — each model carries different implications for your cash flow, tax position, balance sheet, and long-term energy savings. Getting the structure wrong can undermine a project that would otherwise have delivered excellent returns.
This guide breaks down the main commercial solar financing options available to South African businesses, what each model means in practice, and how to approach the decision with confidence.
Why Financing Structure Matters as Much as System Design
A solar project is a long-term capital decision. The system you install today will generate energy — and financial returns — for 20 to 25 years. The financing model you choose determines who owns that asset, who absorbs the risk, and how the savings flow back to your business.
Choosing the wrong structure isn’t just a financial inconvenience — it can lock your business into unfavourable escalation clauses, limit your ability to refinance, or leave you exposed to performance risk without adequate contractual protection.
This is why independent advice at the financing stage is as important as technical advice at the design stage. An installer will recommend the financing model that suits their business model. An independent advisor will recommend the model that suits yours.
The Three Main Commercial Solar Financing Models
1. Self-Funded (Capex)
The business purchases the solar system outright using its own capital as an investment. The asset sits on your balance sheet, and all energy savings accrue directly to your business from day one.
Best suited to: Businesses with available capital, strong balance sheets, and a preference for full ownership and maximum long-term return.
Key advantages:
- Offers higher immediate, direct load supplementation during peak periods
- Maximum lifetime savings — no monthly payments or per-unit charges
- Full eligibility for the Section 12BA tax incentive, which allows businesses to deduct 125% of the cost of qualifying solar assets in the year of investment
- No risks to national transmission grid challenges
- No third-party IPP dependency or grid escalation risk
- Asset ownership adds value to the property
- Additional benefit of being able to charge batteries using excess solar
Key considerations:
- Requires upfront capital outlay
- Internal rate of return (IRR) typically ranges from 15% to 25% — a compelling return that improves with every Eskom tariff increase
- Payback periods for well-designed C&I systems typically range from 4 to 7 years
For businesses that can deploy the capital, self-funding is almost always the highest-return option over the life of the system.
2. Solar Lease Agreement
A third-party financier owns the solar system and leases it to your business for a fixed monthly fee. At the end of the lease term — typically 5 to 10 years — ownership may transfer to your business.
Best suited to: Businesses that want to avoid upfront capex but prefer a fixed, predictable monthly cost over a per-unit energy charge.
Key advantages:
- Zero or low upfront capital requirement
- Fixed monthly cost provides budget certainty
- Maintenance is often included in the lease arrangement
- Frees up capital for core business investment
Key considerations:
- Total cost over the lease term will exceed the self-funded equivalent
- Escalation clauses vary significantly between lease providers — independent review is essential
- Section 12BA tax incentive does not apply (the financier, not your business, owns the asset)
- Ensure the contract includes clear performance guarantees and remedies
3. Power Purchase Agreement (PPA)
Under a PPA, a third-party developer finances, installs, and owns the solar system on your property. Your business pays only for the electricity the system generates, at a rate agreed upfront — typically below Eskom’s current tariff.
Best suited to: Businesses that want zero capex exposure and a direct, ongoing saving on their electricity bill without owning the asset.
Key advantages:
- Zero capex — no capital outlay required
- You pay only for energy consumed, at a rate below grid tariff
- Operations and Risk of underperformance sits with the system owner, not your business
- Increasingly available for C&I projects across South Africa
- Equity participation can reduce tariff
Key considerations:
- PPA rates typically include an annual escalation clause — the long-term rate must be modelled carefully against projected Eskom tariff increases
- You do not own the asset and cannot claim Section 12BA
- Exit clauses and what happens at end of term must be clearly defined
For a detailed look at how PPAs work in the South African context, the South African Photovoltaic Industry Association (SAPVIA) publishes guidance on PPA structures and market standards for C&I projects.
The Role of Section 12BA in Your Financing Decision
The Section 12BA tax incentive — introduced by the South African Revenue Service (SARS) — allows businesses to deduct 125% of the cost of qualifying renewable energy assets in the year the asset is brought into use. For a self-funded solar project valued at R5 million, this translates to a R6.25 million tax deduction, significantly improving the after-tax return on investment.
This incentive applies only to businesses that own the solar asset — making the self-funded model significantly more attractive for profitable businesses with sufficient taxable income to absorb the deduction. For the latest guidance on eligibility and application, refer directly to the SARS website.
What Independent Financing Advice Looks Like in Practice
When SOLINK conducts a feasibility analysis for a commercial solar project, financing structure is evaluated as part of the business case — not as an afterthought. Our engineers model all three financing routes against your actual energy consumption data, tax position, and capital availability to identify which structure delivers the best outcome for your specific business.
This matters because the right answer is different for every client. A property fund with multiple sites and strong capital access will almost always benefit from self-funding and Section 12BA. A manufacturer with tight working capital may be better served by a well-structured PPA — provided the escalation terms are independently reviewed.
Explore SOLINK’s feasibility analysis and project advisory services →
Common Mistakes Businesses Make When Financing Solar
Accepting the installer’s recommended financing model without independent review. Installers often have preferred financing partners whose models benefit the installer, not the client.
Focusing only on the monthly cost. A low monthly payment may look attractive but could conceal aggressive escalation clauses that erode savings over time.
Not modelling the Section 12BA benefit. For profitable businesses funding their own systems, the tax incentive can materially reduce the effective cost of the project — sometimes by 25% or more in the first year.
Signing long-term PPA or lease contracts without independent legal review. Twenty-year contracts with inadequately defined performance guarantees and exit clauses represent significant long-term commercial risk.
Frequently Asked Questions
Q: Can my business access solar financing if we are a tenant, not a building owner? Yes — in many cases. PPAs and lease structures can be structured for tenants, provided the landlord’s consent is obtained and the lease term aligns with your tenancy agreement. The complexity increases with multi-tenant buildings, which is where independent advice becomes particularly valuable.
Q: What is the minimum project size for a commercial PPA in South Africa? Most PPA providers in South Africa currently focus on projects above 150 kWp to 200 kWp. Smaller commercial systems are generally better suited to self-funded or lease structures. SAPVIA’s member directory can help identify accredited PPA providers active in your region.
Q: How does SOLINK’s advisory fee work? SOLINK’s advisory fee is typically 2–4% of total project cost (minimum R75,000). In most cases, the savings achieved through competitive procurement alone exceed the advisory fee — meaning the advisor reduces your net project cost, not increases it. Learn more about the SOLINK Core platform →
Make the Right Financing Decision — With the Right Advice
Commercial solar financing is not a one-size-fits-all decision. The model that delivers the best outcome for your business depends on your capital position, tax profile, risk appetite, and long-term energy strategy — and it should be evaluated independently, not through the lens of a supplier trying to close a deal.
SOLINK’s independent engineers have facilitated over 200 MW of commercial and industrial solar projects across South Africa — helping businesses like Old Mutual, Heineken, Liberty and Growthpoint to name a few, make financing decisions that deliver real, lasting returns.
Whether you’re at the earliest stage of evaluating solar or you’ve already received proposals and want an independent second opinion, we’re ready to help.
See the full range of projects SOLINK has delivered →
Ready to Explore Your Solar Financing Options?
Talk to SOLINK’s independent engineers — no installer bias, no sales agenda.
We’ll model your project across all three financing structures and give you an honest assessment of which option delivers the best outcome for your business.
SOLINK (Pty) Ltd | info@solink.co.za | Cape Town: 021 300 0485 | Johannesburg: 010 500 7675
