Electricity pricing in South Africa is operated within a relatively predictable framework which is driven by a vertically integrated industry, centrally regulated tariffs and a customer base that consumes electricity almost exclusively through traditional distribution networks. That era is ending.
The introduction of market reforms under the amended Electricity Regulation Act, together with the development of the South African Wholesale Electricity Market (SAWEM), is fundamentally reshaping how electricity will be bought, sold and priced.
These reforms are creating a more competitive and dynamic market environment, where electricity prices will increasingly be influenced by market signals rather than solely by regulatory determinations.
As Onicah Rantwane, Middle Manager: Electricity Trading Compliance at Eskom, observed during the recent industry discussion on electricity tariffs and municipal sustainability at Enlit Africa’s Municipal Forum, South Africa is entering “a very interesting and exciting environment” characterised by increased market participation, bilateral trading, wheeling arrangements, self-generation and more active customer participation.
However, these opportunities also introduce profound challenges for regulators, utilities and municipalities alike.
One of the most significant developments in South Africa’s electricity reform agenda is the gradual movement away from purely cost-of-service tariff determination towards market-linked pricing mechanisms.
Historically, the National Energy Regulator of South Africa (Nersa) determined electricity prices through well-established regulatory methodologies, creating predictable annual tariff structures.
Under the emerging market framework, however, Nersa’s role is expected to evolve. Rather than determining every element of electricity pricing directly, the regulator will increasingly oversee market structures, establish regulatory guardrails and ensure fair competition while allowing market dynamics to play a larger role in price discovery.
This transition aligns with international electricity markets, where wholesale prices fluctuate continuously in response to supply and demand conditions. Such a system introduces efficiency and competition but simultaneously exposes participants to greater price volatility and market risk.
The challenge for South Africa lies in balancing market efficiency with affordability, reliability and social equity.
ALSO READ: The language of African data centres – 15 terms every infrastructure professional should know
The greatest disruption facing municipal electricity distributors is not merely market reform itself, but the rapid evolution of customer behaviour.
The years of severe loadshedding fundamentally altered how consumers view electricity supply. Households and businesses increasingly invested in rooftop solar photovoltaic systems, battery storage and alternative supply arrangements.
While these investments have strengthened customer resilience, they have simultaneously exposed weaknesses in traditional municipal tariff structures.
The historic municipal business model relied heavily on volumetric sales, earning revenue primarily through the number of kilowatt-hours consumed. This approach worked effectively when electricity consumption steadily increased and customers depended almost entirely on the grid.
Today, however, many consumers continue to rely on the electricity network for backup, reliability and grid stability while dramatically reducing their purchased electricity volumes. The result is a growing mismatch between the cost of maintaining the network and the revenue generated from customers who continue to use it.
As Rantwane explained, a customer who previously spent R4,000 per month on electricity may reduce their monthly expenditure to R500 after installing rooftop solar, despite continuing to rely on municipal infrastructure during periods of low solar generation or adverse weather conditions.
While this represents a financial benefit for the consumer, it creates a significant revenue shortfall for electricity distributors.
This phenomenon, commonly referred to as “cost bypass”, represents one of the most serious threats to municipal electricity sustainability.
Municipal distributors still incur the costs associated with operating and maintaining networks, paying staff, upgrading infrastructure and ensuring reliability.
These costs do not decline proportionally when customer consumption falls. Consequently, municipalities often attempt to recover lost revenue through higher electricity tariffs.
This creates what energy economists describe as the “utility death spiral”. Rising electricity prices encourage wealthier customers to further reduce grid consumption through self-generation, which in turn forces utilities to increase prices again to recover fixed costs.
Ultimately, lower-income households that cannot afford alternative energy technologies bear an increasingly disproportionate share of network costs.
The implications extend beyond municipal finances. Electricity revenue has historically subsidised numerous municipal services.
As electricity revenues decline, municipalities face mounting pressure to sustain broader public service delivery obligations while simultaneously maintaining electricity infrastructure.
The introduction of wholesale electricity markets will introduce a new reality for South African electricity pricing: volatility.
Unlike traditional regulated tariffs, wholesale market prices respond continuously to changes in supply and demand conditions. Prices may fluctuate dramatically within short periods, reflecting generation availability, network constraints and customer demand patterns.
International experience demonstrates both the opportunities and risks associated with such markets. The California electricity crisis of the early 2000s illustrated the dangers of disconnecting wholesale market pricing from retail tariff structures.
Wholesale prices increased significantly while retail prices remained regulated and fixed, creating severe financial stress for electricity suppliers. Similar challenges have emerged in other liberalised electricity markets where tariff structures failed to adapt to changing market conditions.
For South Africa, the concern lies in how retail electricity tariffs can evolve to reflect dynamic market conditions while remaining affordable and understandable for customers.
A recurring theme emerging from industry experts is the need to fundamentally redesign electricity tariff structures.
Gary Ross, Head of Pricing and Regulation at the City of Cape Town, argues that future electricity tariffs must become substantially more transparent by separating the various components of electricity costs.
Rather than presenting customers with a single energy charge, future tariffs should distinguish between energy costs, network costs, reliability charges, system support services and policy-related subsidies.
Such tariff unbundling would achieve several objectives:
However, experts caution that this transition must occur gradually to avoid unintended affordability impacts, particularly for vulnerable consumers.
The future electricity market will require equally sophisticated infrastructure.
Professor Prathaban Mothil of the South African National Energy Development Institute (SANEDI) argues that the electricity sector must embrace the reality that customers are becoming active market participants rather than passive consumers.
This transformation requires investments in smart meters, digital platforms, advanced network monitoring and dynamic pricing systems.
Smart metering infrastructure will become particularly important in enabling:
The rapid deployment of digital technologies, combined with advanced analytics and artificial intelligence, presents opportunities to fundamentally redesign electricity pricing around services and value rather than purely energy consumption volumes.
Perhaps the most important lesson emerging from international electricity market reform is that utilities do not disappear, they evolve.
Rather than acting solely as electricity sellers, future municipal distributors may increasingly become energy service platforms, network operators and market facilitators. Their role will shift from maximising electricity sales volumes towards providing reliability, flexibility, market access and customer services.
This transition requires significant regulatory reform, institutional adaptation and investment. However, international experience demonstrates that electricity distributors can remain financially sustainable and commercially successful within competitive market environments.
South Africa’s electricity transition represents far more than a technological transformation; it is fundamentally an economic and institutional transition.
Market reform, distributed energy resources, self-generation and wholesale competition are rapidly changing how electricity systems operate. Yet the sustainability of this transition ultimately depends on whether electricity tariffs evolve alongside these changes.
As Onicah Rantwane concluded, tariff reform cannot remain a secondary consideration. It sits at the centre of South Africa’s electricity market transformation.
The future of electricity prices will not simply be determined by regulators or markets alone. It will depend on how effectively South Africa balances competition with affordability, innovation with equity, and market efficiency with long-term municipal sustainability.
READ NEXT: How AI and data centres can boost South Africa’s capability for renewable projects
Contact Us
VUKA is the trusted media partner to key professionals, policy makers, suppliers and
manufacturers. We provide unparalleled opportunities for industry-wide connection.
