South Africa’s electricity landscape is changing — and fast. With Eskom tariffs increasing year on year, persistent grid pressure, and a rapidly expanding pipeline of privately developed renewable energy projects, commercial and industrial (C&I) businesses across the country are asking a straightforward but important question: how can we access clean, affordable electricity without installing our own solar panels?
For a growing number of energy users, the answer is wheeled energy. But what exactly is it, and how does energy wheeling work in South Africa? This guide breaks it down clearly — from the basic concept through to the mechanics of the Eskom grid — so your business can make an informed decision about whether wheeled energy is the right fit.
For a broader view of the South African wheeled energy market, including live grid capacity data, visit the Energy Brokers Market Review.
What Is Wheeled Energy?
Wheeled energy is the process of transmitting electricity generated by a renewable energy source — such as solar PV or wind — through an existing electricity grid to an end-user at a separate location. The energy is not physically transported from one point to another. Instead, an equivalent volume of electricity is drawn from the grid at the offtaker’s site, with the accounting handled through a metering and reconciliation system.
In practical terms: an Independent Power Producer (IPP) generates electricity at their facility and feeds it into the national grid. That energy is then “wheeled” across the Eskom transmission network to a business — known as the offtaker — who purchases it under a commercial agreement. The offtaker receives the benefit of renewable electricity through their existing Eskom connection, without needing to own or operate any generation equipment.
Think of it like a toll road. The IPP uses Eskom’s transmission infrastructure as the highway to deliver power to your premises. Eskom charges a wheeling fee for this service — but the result is that your business accesses competitively priced, independently generated green energy with no capital investment in on-site infrastructure.
How Does Energy Wheeling Work in South Africa? A Step-by-Step Breakdown
Understanding how energy wheeling works requires a basic grasp of South Africa’s electricity grid. Here is the process, step by step:
Step 1 — Generation An IPP generates electricity from solar PV, wind, or battery energy storage (BESS) at a registered generation facility.
Step 2 — Grid Injection The IPP feeds this electricity into Eskom’s national transmission grid.
Step 3 — WEPS Tracking Eskom tracks the energy flow using the Wheeling Energy Purchase System (WEPS) and applies a corresponding credit to the offtaker’s electricity account.
Step 4 — Offtaker Drawdown The offtaker draws power from the grid as normal. Their monthly bill, however, reflects the wheeled renewable energy they have purchased — offset against what they would otherwise owe Eskom.
Step 5 — PPA Governance A Power Purchase Agreement (PPA) governs the commercial terms between the IPP and the offtaker, covering the agreed tariff, contract duration, and energy volumes.
Eskom charges both the generator and the offtaker a wheeling fee to cover use of its transmission infrastructure. These fees are factored into the overall business case and reflected within the PPA pricing — meaning the net cost to the offtaker remains competitive relative to standard Eskom tariffs.
According to NERSA, South Africa’s energy regulator, the regulatory framework for private generation and wheeling continues to evolve as private capacity expands — creating an increasingly accessible environment for C&I buyers.
What Makes Wheeled Energy Different from Rooftop Solar?
This is one of the most common questions businesses ask when they first encounter wheeled energy.
Unlike rooftop solar or an embedded generator, wheeled energy requires no physical installation at your site. The generation happens remotely, and the electricity reaches your business through the same Eskom connection you already use. This makes wheeled energy one of the lowest-barrier paths to renewable energy procurement available to South African businesses today.
The key distinctions are:
- No capital expenditure — the IPP carries all project development and infrastructure costs
- No installation disruption — operations continue unaffected during setup
- No ownership risk — you are purchasing electricity, not managing an asset
- Scalability — energy volumes are governed by your PPA, not constrained by your roof size or site limitations
For a detailed comparison of wheeled energy and embedded generation, see our guide on Wheeled Energy vs Embedded Generation.
Why Are South African Businesses Choosing Wheeled Energy Now?
Several converging factors are driving adoption across the C&I sector in South Africa.
1. Rising Eskom Tariffs
Eskom’s tariffs have increased consistently over the past decade, with further increases anticipated. Wheeled renewable energy — particularly from solar and wind — can offer materially lower per-kWh costs over a contract term, providing businesses with a predictable, inflation-protected energy price.
2. No Upfront Infrastructure Cost
Unlike an embedded solar system, wheeled energy requires zero capital investment from the offtaker. The IPP carries the project development cost, and the offtaker simply enters a PPA and begins receiving the benefit.
3. ESG and Green Reporting
Wheeled energy PPAs include Renewable Energy Certificates (RECs) issued to the offtaker throughout the contract term. These allow your business to make verified claims about renewable energy use in sustainability reports and ESG disclosures — directly supporting net zero goals. The GHG Protocol recognises wheeled renewable energy as a valid mechanism for Scope 2 emissions reduction.
4. Complements Existing On-Site Solar
Even if your facility already has an embedded solar system, wheeled energy can add further renewable penetration. Eskom’s WEPS reconciliation operates on a Monthly Time of Use basis, which means additional coverage is possible. Wheeled wind energy in particular generates during periods when on-site solar is not producing — providing renewable coverage around the clock.
5. Access to Scale Benefits Through a Broker
Working with a specialist energy broker gives offtakers access to aggregated buying power across a portfolio of vetted IPP projects. This unlocks pricing and commercial terms that a single business could not achieve negotiating independently. Explore Energy Brokers’ full range of brokerage services to understand how this model works in practice.
What Is the Eskom WEPS System?
The Wheeling Energy Purchase System (WEPS) is Eskom’s platform for tracking, reconciling, and crediting wheeled energy transactions. When an IPP injects electricity into the grid, WEPS records that volume and applies a credit to the offtaker’s Eskom account on a Monthly Time of Use basis.
This means the offtaker does not receive a separate electricity supply — they continue to draw power from the grid as normal, but their bill is adjusted to reflect the renewable electricity they have purchased through their PPA. The Eskom Transmission division administers the technical requirements and connection conditions that underpin this process.
Is Now the Right Time to Wheel Energy?
South Africa’s national grid requires significant investment to support new transmission infrastructure. With Eskom’s upgrade funding not becoming substantial until after 2030, grid capacity constraints are expected to intensify. Businesses that secure wheeled energy agreements now can lock in favourable long-term tariffs before the window tightens.
The market is moving. The question is whether your business will move with it — or wait until competitive pricing and grid access become harder to secure.
Frequently Asked Questions
What is wheeled energy in simple terms? Wheeled energy is renewable electricity generated by an IPP at one location and delivered to your business at another, using Eskom’s existing grid. You purchase it under a PPA and receive a credit on your Eskom bill through WEPS — no on-site installation required.
Does wheeled energy help during load shedding? Wheeled energy provides access to cost-effective renewable electricity and long-term tariff stability, but it does not provide on-site backup power during load shedding. It is a procurement model, not an energy security mechanism. Battery storage or generator solutions would be required alongside it for load shedding resilience.
What does Eskom charge for wheeling? Eskom charges approximately 3 cents per kWh to the generator and approximately 14 cents per kWh to the offtaker as a WEPS rebate adjustment. These fees are incorporated into the overall business case and accounted for within PPA pricing.
Can I use wheeled energy if I already have rooftop solar? Yes. Wheeled energy can provide additional renewable penetration even where on-site solar has been sized to your full load, due to the Monthly Time of Use reconciliation used by WEPS. Wheeled wind energy is a particularly valuable complement.
Ready to Explore Wheeled Energy for Your Business?
Energy Brokers connects South African businesses with vetted, competitive renewable energy suppliers — at no additional cost to the offtaker. With access to over 1,500 MW of fully vetted wind, solar, and BESS projects, and a team that manages everything from feasibility analysis through to contract signature and operational support, we simplify the complexity of commercial energy procurement.
