With installed renewable energy capacity now at 18.18 GW and corporate investment continuing to rise, South African businesses are moving decisively towards cleaner power. Yet, while adoption accelerates, traditional procurement models are coming under increasing pressure. Long-term Power Purchase Agreements (PPAs) have historically been the preferred route to renewable energy adoption, but in a market defined by change, committing to decade-long agreements is becoming harder to justify.
As a result, short-term PPAs are reshaping how companies approach energy procurement, offering greater flexibility, adaptability, and faster access to renewable energy solutions.
Rethinking long-term commitments
The appeal of long-term PPAs has always been clear. Longer contract tenures allow for lower tariffs and predictable energy costs over time. However, these agreements also come with trade-offs that are becoming harder for organisations to justify.
“Twenty years is a long time,” says Anja Visagie, Chief Growth and Marketing Officer at Sustainable Power Solutions. “For many organisations, it’s simply too far into the future to confidently commit, especially in industries where conditions can change rapidly.”
Businesses are increasingly aware that locking into long-term agreements may limit their ability to respond to new opportunities, changing regulations and evolving technologies. External shocks such as COVID-19 have further accelerated demand for shorter, more adaptable contractual structures.
“There’s a real concern that better opportunities are just around the corner,” adds Charles Neethling, Senior Business Developer at Sustainable Power Solutions. “Companies want to retain the flexibility to adapt as the market evolves.”
The conditions enabling shorter-term models
The growing viability of short-term PPAs reflects several structural shifts in South Africa’s energy market. Sustained double-digit electricity tariff increases have made renewable energy competitive even over shorter timeframes, while declining solar costs have improved the economics of shorter-duration agreements.
“The economics have fundamentally changed,” says Neethling. “Where shorter-term PPAs were previously not competitive, they can now deliver meaningful savings within five years.”
The rise of wheeling frameworks and energy traders has also shifted expectations around renewable energy procurement. Flexible five-year wheeling agreements have shown that companies no longer need to commit to decade-long contracts to access renewable power.
That shift in mindset has created growing demand for shorter-term PPAs in behind-the-meter solar projects, giving businesses the same flexibility while delivering stronger savings through on-site generation.
“Behind-the-meter generation typically delivers the greatest savings,” Neethling notes. “Wheeling can play a role, but it is often more effective as a complementary solution rather than the starting point.”
Aligning energy procurement with business realities
Short-term PPAs are particularly well suited to sectors with constrained or variable planning horizons. In mining, energy strategies are often tied to life-of-mine timelines, making long-term contracts impractical.
“Flexible PPAs aligned to life-of-mine cycles make far more sense,” says Neethling. “They allow mining companies to secure energy now without overcommitting beyond their operational lifespan.”
Municipalities face similar challenges, with procurement frameworks often limiting contract durations unless additional approvals are secured. Across sectors, businesses are balancing immediate energy needs with longer-term strategic goals.
“It’s about accessing the solution now,” says Visagie. “Rather than delaying for years, businesses can start generating savings and carbon benefits immediately, while keeping their long-term options open.”
Bridging the gap between ownership and flexibility
Short-term PPAs are also helping businesses overcome financing constraints while still keeping a pathway to ownership open. Many South African companies want to own their energy infrastructure, but budget limitations and competing priorities often delay projects.
Shorter-term agreements allow businesses to start saving immediately, while specialist energy partners manage the funding, performance and maintenance of the system during the contract term.
“This approach bridges the gap between ownership and rental,” Visagie explains. “Businesses can benefit now and eventually own the system after five years, instead of waiting for budgets to free up or reallocating capital elsewhere.”
Buyout models add further flexibility, allowing companies to purchase the system at a later stage if capital becomes available, while still benefiting from immediate savings in the meantime.
Flexibility is becoming the new competitive advantage
Short-term PPAs are becoming a practical way for businesses to meet immediate energy needs while preserving options for longer-term strategies. These agreements help reduce reliance on the grid, manage rising energy costs, and support the transition to cleaner power without long-term commitments.
At the end of a shorter PPA, businesses can reassess their strategy, whether by extending the contract, taking ownership, or pursuing new energy solutions. This flexibility reflects a broader shift in mindset as South African companies increasingly value adaptability, speed, and resilience.
“In a volatile energy environment, the ability to act quickly, realise savings early, and adapt over time is becoming a clear competitive advantage,” Visagie concludes.
