South Africa's NTCSA TSO Phase II planning deadline, Eskom's R119-billion municipal arrears crisis, and a 19.3 GW NERSA registration queue are converging into the defining grid-access governance moment of 2026 — and every C&I wheeling buyer signing a year-end PPA must price all three risks in now.

The Governance Wildcard That Every C&I Wheeling Buyer Must Price Into Year-End PPAs

South Africa's electricity sector is in the middle of its most consequential structural transition in a generation — and the clock is running out for commercial property owners who have not yet factored the October 2026 governance shift into their power purchase agreement (PPA) negotiations. The National Transmission Company South Africa's (NTCSA) Phase II planning deadline, Eskom's R119-billion municipal arrears overhang, and a rapidly filling 19.3 GW NERSA generation queue are converging into a single, high-stakes moment that will define grid-access economics for 2027 and beyond.

What Is the NTCSA TSO Phase II — and Why Does October 2026 Matter?

Phase I is done. Phase II is live. In Phase II, which started immediately after the Phase I report was endorsed, the detailed transaction structure and implementation plan for a fully independent Transmission System Operator (TSO) will be developed — a process expected to proceed over the next three months.

During the 2026 State of the Nation Address, President Cyril Ramaphosa announced the establishment of a dedicated task team to oversee the restructuring of Eskom to establish a fully independent, state-owned TSO that will own and control transmission assets and be responsible for operating the electricity market.

The NTCSA has welcomed formal approval from the Minister of Electricity and Energy, Dr Kgosientsho Ramokgopa, to establish this new and fully independent TSO. The entity will be created as a standalone State-Owned Company (SOC) outside Eskom Holdings, and once operational, will function under the regulatory authority of NERSA.

The Electricity Regulation Act (ERA) provides for the establishment of the TSO by no later than 31 December 2029. But the Phase II implementation planning — happening right now — is the moment when connection-approval authority, dispatch rules, and settlement frameworks for private wheeling will be structurally re-written. C&I buyers signing 10–20 year PPAs in Q4 2026 are effectively signing contracts that will be administered under a governance architecture that does not yet fully exist.

The R119-Billion Arrears Problem: Why Municipal Debt Is a PPA Risk Factor

Eskom's integrated report shows municipal arrears increased by 17.9% to R111.6 billion at the end of March 2026, rising further to R119.9 billion by June. Municipalities account for approximately 44% of Eskom's electricity sales, making payment discipline in the sector critical to the utility's cash flow.

Municipalities currently owe the utility R120.26 billion in overdue debt, with 83 municipalities subject to Eskom's formal debt-recovery processes. Finance Minister Enoch Godongwana has revealed that 50 of 71 municipalities participating in the Municipal Debt Relief Programme have failed to pay their current accounts to Eskom.

Without decisive intervention, Eskom projects municipal debt could balloon to R358 billion by the 2031 financial year. The Minister has also warned that municipal arrears are increasing by approximately R3 billion every month.

Arrear debt actively blocks the legal separation of the distribution division. Distribution cannot proceed to corporatisation because it cannot satisfy the liquidity and solvency tests required for lender consent.

For C&I wheeling buyers, this is not an abstract balance-sheet problem. If your wheeling route passes through a distressed municipality — one of 83 currently in Eskom's debt-recovery pipeline — your connection-approval pathway, your metering agreements, and ultimately your energy delivery reliability are all exposed. Every PPA signed in Q4 2026 must explicitly address municipal credit risk in the force majeure, curtailment, and termination clauses.

The Grid-Access Crunch: 19.3 GW in Queue, Shrinking Slots

South Africa's wheeling sector is racing toward 5,700 MW of financial closes in 2026 — nearly double last year — as 30 large projects sprint to year-end funding and a 19.3 GW NERSA registration queue signals a grid-access crunch that every C&I energy buyer must act on now.

South Africa has an oversupply of renewable energy projects under development relative to available grid access. The Grid Capacity Allocation Rules (GCAR) formalise readiness-based allocation and queue management for scarce grid capacity, replacing the Interim GCAR introduced by Eskom. For C&I buyers, this means the site a project occupies on the grid — and its readiness relative to competitors — now directly determines whether power can be delivered under a PPA at all.

The NTCSA has a 14,450 km transmission build target but completed just 108 km by mid-FY2026 — a delivery gap that is now the invisible ceiling on every new C&I wheeling contract, forcing C&I energy buyers to rethink PPA tenor, site selection, and bankability strategy in H2 2026.

The New Regulatory Layer: Trading Rules, Market Code, and Trader Licensing

NERSA's updated Regulatory Rules on Network Charges for Third-Party Transportation of Energy — approved in March 2025 — permit cross-jurisdictional wheeling between Eskom and municipalities, and are designed to stimulate competition in electricity generation.

Running alongside the Market Code, NERSA published revised draft Electricity Trading Rules (Version 01, dated 12 April 2026) together with a consultation paper. These rules govern the bilateral trading market — the mechanism most immediately relevant to C&I buyers contracting via wheeled PPAs today.

The Trading Rules are being implemented in two phases: Phase 1 allows transmission and high-voltage customers to source part of their energy from traders, while managing risks associated with early market opening and metering readiness for smaller customers.

PPAs remain the primary contracting vehicle. The Trading Rules explicitly recognise registered generators supplying wheeled energy through PPAs. Contracts signed now under the bilateral framework are protected through the Phase 1-to-Phase 2 transition.

Trader licensing matters more than ever. Under the new rules, traders must obtain a NERSA-issued trading licence and comply with the revised framework. C&I buyers should ensure their IPP or developer counterparty holds — or is actively pursuing — a compliant trading licence.

Eskom's Tariff Trajectory: The Baseline You're Buying Against

Municipal arrear debt rose to R119.9 billion by June 2026, electricity sales volumes fell by 6.2% to 178TWh, and the average tariff rose by about 12.7%, allowing revenue to rise by about 4.1% despite lower sales. This is the tariff environment that makes wheeled solar PPA pricing so compelling — but it also means the Eskom baseline against which your PPA savings are calculated is itself volatile.

Long-dated PPAs with fixed escalation clauses insulate off-takers from the volatility of Eskom tariff hikes, which rose 12.7% in April 2026 alone. Cape Town's two landmark 20-year solar PPAs — priced 19–21% below Eskom tariffs with CPI escalation — have reset the benchmark for C&I urban energy procurement in South Africa.

The Practical Buyer's Checklist for Q4 2026 PPA Negotiations

Given everything above, here are the six non-negotiable due-diligence items every commercial property owner must complete before signing a year-end PPA:

1. Map your wheeling route for municipal arrear exposure. Confirm whether your power delivery path crosses any of the 83 municipalities in Eskom's debt-recovery process. If it does, negotiate explicit curtailment-risk provisions and alternative routing guarantees.
2. Verify your developer's GCAR queue position and readiness tier. Under the new Grid Capacity Allocation Rules, a NERSA-registered project is not the same as a project with a confirmed grid slot. Ask for written confirmation of queue position and milestone dates.
3. Confirm your energy trader holds a valid NERSA trading licence. Phase II of the Trading Rules raises compliance requirements. An unlicensed or non-compliant trader is an unacceptable contractual counterparty risk in a Q4 2026 PPA.
4. Stress-test your PPA against the TSO transition. Phase II planning will re-define connection-approval authority and dispatch rules. Ensure your PPA includes regulatory change clauses that protect tariff and delivery obligations through the NTCSA-to-TSO handover period.
5. Benchmark pricing against Cape Town's 19–21% discount floor. If your proposed PPA is not pricing at least 15% below Eskom's current tariff with CPI-linked escalation capped below Eskom's historical average, the economics need re-modelling.
6. Build in a 2027 dispatch-rule review clause. The South African Wholesale Electricity Market (SAWEM) launch — deferred from April 2026 — will introduce new dispatch and settlement rules. Any PPA signed today without a framework for accommodating SAWEM's commercial rules is structurally incomplete.

What Happens If You Wait?

With 19.3 GW of registered projects competing for constrained transmission slots under the GCAR's readiness-based allocation rules, wheeling charges and grid-access premiums are tightening. Buyers who delay site selection and PPA execution are not just missing a pricing window — they risk being allocated lower-priority grid slots that could delay project commissioning by 12–24 months.

Business has warned that a lack of clarity around the establishment of a Transmission System Operator alongside the NTCSA has introduced new complexity and uncertainty for investors in South Africa's emerging open electricity market. That uncertainty has a price — and in Q4 2026, the buyers who price it correctly are the ones who will lock in bankable, long-term energy cost certainty before the structural handover resets the rules.

SolarXgen's Bottom Line

The NTCSA TSO Phase II deadline is not a distant regulatory milestone — it is an active governance transition reshaping who approves connections, under what rules private wheeling projects will be dispatched, and how settlement will work in 2027. Combined with a R119-billion municipal arrears overhang that blocks distribution separation, a 19.3 GW NERSA queue outstripping available grid capacity, and a 12.7% Eskom tariff hike already on the books, the case for executing a well-structured wheeling PPA before year-end has never been stronger — or more technically demanding.

Commercial property owners who approach this as a simple energy procurement exercise will be exposed. Those who treat it as a structured financial and regulatory decision — with the right legal protections, developer due diligence, and grid-access verification — will emerge from 2027's market reset in a materially stronger position.

SolarXgen advises C&I clients across South Africa's wheeling landscape. Contact our commercial desk for a tailored grid-access and PPA risk assessment for your portfolio.