Inside SAPP's Shift to Competitive Wholesale Trading — and What It Means for Cross-Border IPP Structuring

A Regional Market Two Decades in the Making

The Southern African Power Pool (SAPP), established in 1995, has run a day-ahead trading market since 2009 — but for most of that history, participation was effectively limited to member-country utilities trading bilaterally. That is changing. Per pv magazine Global (23 July 2026), SAPP now pools roughly 47.7 GW of operational capacity across its 12 member countries, serving an estimated 360 million people, and is seeing genuinely growing participation from independent power producers, traders and aggregators — not just state utilities.

Zambia's Open-Access Policy as the Regional Precedent

The clearest catalyst is Zambia's open-access policy, enacted in 2024, which opened ZESCO's transmission network to third-party traders and, by extension, gave IPPs a more direct route to transact power beyond a single domestic offtaker. As Dominic Goncalves, Advisory Partner for Energy Strategy at Cresco Project Finance, puts it: regional market demand is moving from simply chasing the cheapest renewable megawatt-hour toward dispatchable, firmed renewable energy delivered when required — a shift that reframes how cross-border projects should be structured and priced from the outset.

The Structuring Implication for Utility-Scale IPPs

For sponsors and financiers active across South Africa, Namibia, Zambia, Zimbabwe, Botswana and the wider region, an increasingly liquid SAPP day-ahead market is a genuine — if still early-stage — alternative or complement to a single long-term bilateral PPA. But it doesn't remove the region's binding constraint: physical cross-border transmission capacity. Interconnector build-out across SADC continues to lag behind the ambition of a fully integrated regional market, meaning market-access reform and transmission infrastructure timelines need to be tracked together, not treated as separate workstreams, when assessing a cross-border project's true revenue optionality.

Key Data Takeaways

• SAPP pools roughly 47.7 GW of operational capacity across 12 member countries, serving an estimated 360 million people (pv magazine Global, 23 Jul 2026)
• SAPP's day-ahead trading market has operated since 2009; SAPP itself was established in 1995
• Zambia's 2024 open-access policy is cited as the clearest current precedent for IPP/trader/aggregator participation in regional power trading
• Regional lender and buyer demand is shifting toward dispatchable, firmed renewable capacity, not just lowest-cost generation

The IPP Action Step

Cross-border project sponsors should treat SAPP market-access reform as a live structuring input — not a settled backdrop — when assessing regional offtake and revenue-diversification options, while continuing to underwrite primarily around confirmed bilateral PPA and interconnector capacity. Imvelo IPP's legal, structuring and procurement advisory tracks both fronts for clients developing across the SADC footprint.