If you’ve researched commercial solar in South Africa recently, you’ve likely come across the term “PPA” — Power Purchase Agreement. It’s the financing structure underpinning much of the country’s growth in commercial and industrial solar, yet it’s often left unexplained in plain terms. Here’s what it actually means, and why it matters for your business.
What Is a Power Purchase Agreement?
A Power Purchase Agreement is a contract between a business (the “off-taker”) and a solar financing or generation company. Under the agreement, the financing company designs, funds, installs, owns, and maintains a solar system on or near the business’s property. In return, the business agrees to purchase the electricity generated by that system at a pre-agreed rate — usually lower than its current grid tariff — over a fixed term, commonly 10 to 20 years.
Critically, the business never owns the equipment (unless the agreement includes an end-of-term buyout option) and never pays for it upfront. It simply pays for the power it consumes, much like it would with its municipal or Eskom bill.
Why PPAs Have Become Central to South Africa’s Solar Growth
South Africa’s wholesale electricity market reforms have made bilateral power agreements like PPAs increasingly viable, giving independent power producers a structured way to sell electricity directly to commercial and industrial off-takers. Combined with falling equipment costs, this has made PPAs one of the most bankable and scalable ways to finance solar in the country.
Key Components of a Solar PPA
1. Tariff structure
The rate per kWh the business pays; usually fixed or escalating at a predictable, agreed rate, offering protection against unpredictable grid tariff hikes.
2. Contract term
Typically long-term (10–20 years), reflecting the asset life of the solar system and the financing structure behind it.
3. Performance guarantees
Commitments from the provider on expected system output, with remedies if performance falls short.
4. Maintenance and insurance
Bundled into the agreement, removing the operational burden from the off-taker.
5. End-of-term options
Some PPAs include the option to purchase the system at a depreciated value once the term ends.
PPA vs. Outright Purchase: A Quick Comparison
| PPA (Funded Model) | Outright Purchase | |
| Upfront cost | None | Full capital cost |
| Ownership | Provider owns system (until any buyout) | Business owns system immediately |
| Maintenance | Included in agreement | Business’s responsibility |
| Risk exposure | Provider bears performance/technical risk | Business bears performance/technical risk |
| Balance sheet impact | Typically off-balance-sheet operating cost | Capital expenditure/asset on balance sheet |
Is a PPA Right for Your Business?
PPAs tend to make the most sense for organisations that want the cost and sustainability benefits of solar without deploying capital, taking on technical/maintenance risk, or carrying the asset on their balance sheet. For businesses that would prefer to own the asset outright and have the capital available, a direct purchase may still be worth comparing.
The Bottom Line
Power Purchase Agreements have become the backbone of South Africa’s commercial solar growth because they align incentives well: businesses get lower, more predictable energy costs, and financing providers are motivated to keep systems performing well over the long term.
Want to see what a PPA rate could look like for your business? Request an indicative quote.