Why embedded generation, fair grid access and public battery storage are essential to affordability, decarbonisation and industrial competitiveness
By Werner Hager, Director, Hager Energy & Automation
Red Seal Electromechanician (South Africa) | Mechatronics NQF 4 (Merseta South Africa) | Advanced Diploma in Automation Engineering (EIT, Australia)
South Africa’s electricity debate has moved beyond the narrow question of whether the lights can be kept on. The more urgent question now is whether the country’s electricity market design is enabling or obstructing the transition to a more affordable, resilient and lower-carbon energy future. Recent analysis from GoSolr has argued that South Africa’s electricity crisis has evolved into an affordability crisis, driven not only by unreliable supply, but also by tariff restructuring, rising fixed fees and inconsistent municipal pricing. At the same time, commentary around former Eskom chief executive André de Ruyter’s long-standing warning about a utility “death spiral” has become increasingly relevant: repeated above-inflation increases risk pushing the most creditworthy households and businesses toward self-generation, leaving Eskom and municipalities with a weaker revenue base and a less sustainable customer mix. [energize.co.za], [dailyinvestor.com], [mybroadband.co.za]
This concern is no longer theoretical. Eskom’s official 2025–2026 tariff documentation reflects a growing emphasis on service, administration and capacity-related cost recovery, rather than purely volumetric billing. Industry reporting has shown that these rising fixed charges are materially weakening the savings case for households and businesses that invest in rooftop solar and batteries, even when those systems reduce demand on the national grid and ease operational pressure on the system. In practical terms, South Africa risks penalising the very consumers and enterprises whose private capital has already helped stabilise electricity supply during a period of prolonged system stress. [eskom.co.za], [energize.co.za], [capetownetc.com]
That is the strategic error. South Africa should not be resisting small-scale embedded generation (SSEG), rooftop solar or behind-the-meter storage. It should be integrating them into a deliberate national reform agenda. GoSolr’s 2025 Light Paper reported that Eskom’s average Energy Availability Factor stood at approximately 57.3%, against a 70% target, highlighting that the utility remains structurally unable to guarantee long-term supply adequacy on its own. Meanwhile, the CSIR found that by mid-2025 South Africa had already reached 6.8 GW of embedded rooftop PV capacity, producing roughly 5.4 TWh in the first half of the year and contributing around 5% of national electricity supply. These are not marginal numbers; they confirm that private generation is already part of the operational backbone of the country’s power system. [gosolr.co.za], [csir.co.za], [techcentral.co.za]
The Australian parallel South Africa should study seriously
South Africa is often presented with a false choice between coal-based reliability and distributed renewable energy. International evidence increasingly shows that this binary view is outdated. Australia offers a particularly relevant case study because it has continued operating legacy thermal generation while rapidly scaling rooftop solar, residential batteries and distributed grid participation. By the end of 2025, Australia’s rooftop solar fleet had reached 28.3 GW, exceeding the country’s entire 22.5 GW coal fleet, while rooftop PV alone contributed 14.2% of national electricity generation in the second half of that year. Australian reporting also shows a sharp acceleration in battery uptake and a growing emphasis on virtual power plants, which allow distributed assets to support overall grid stability and consumer affordability rather than operating in isolation. [cleanenerg...cil.org.au], [cosmicrene...rgy.com.au], [pv-magazin...tralia.com]
The lesson for South Africa is not that coal disappears overnight. The lesson is that a country can run a transitional coal fleet while progressively building a more decentralised, lower-cost and cleaner electricity system around it. Rooftop solar, commercial embedded generation, battery storage and two-way power flows do not undermine resilience when they are properly governed; they strengthen it. The real barrier is therefore not technical feasibility, but whether policy and regulation are willing to evolve fast enough to support the system architecture that is already emerging in practice. [cleanenerg...cil.org.au], [pv-magazin...tralia.com], [gosolr.co.za]
Why residential, commercial and industrial PV all matter
The role of private residential PV is often underestimated because it is viewed as a household investment rather than a system asset. In reality, it serves both functions. Residential solar reduces daytime demand on Eskom and municipalities, and when paired with batteries it can also support evening peak management. The CSIR has shown that South Africa’s residual load profile is already shifting as embedded generation grows, with a deeper midday trough and steeper late-afternoon ramp — the familiar “duck curve” effect. This is clear evidence that rooftop solar is already reshaping national demand patterns. [csir.co.za], [techcentral.co.za], [mybroadband.co.za]
Yet residential customers are increasingly confronted by tariff structures that weaken the reward for efficiency and self-generation. GoSolr has warned that the aggressive rise in fixed charges means many households now pay substantial amounts simply to remain connected, regardless of how responsibly they manage demand or how much they invest in solar and storage. That is the wrong signal in a country that needs more embedded generation, not less. A tariff framework that punishes lower consumption while complaining about insufficient supply is strategically incoherent and economically short-sighted. [energize.co.za], [dailyinvestor.com], [bizcommunity.com]
Small commercial PV is equally important, and in many respects even more urgent. Shops, office parks, schools, warehouses and light-industrial facilities usually have daytime load profiles that align exceptionally well with solar production. That makes embedded PV one of the fastest and most commercially rational ways to reduce operating costs, improve resilience and protect productivity. The CSIR has linked declining demand on the central grid partly to embedded generation growth, while sector reporting has noted that solar remains economically compelling even during periods of reduced load-shedding because electricity tariffs continue to rise faster than inflation. [csir.co.za], [energize.co.za]
However, small businesses are often caught in a regulatory middle ground. They are large enough to be exposed to application fees, smart meter requirements, tariff migration and compliance burdens, yet not large enough to absorb those costs comfortably. Reporting on SSEG regulation has repeatedly highlighted the complexity created by fragmented municipal rules, engineering sign-off requirements, connection processes and inconsistent feed-in arrangements. These frictions slow deployment and reduce the commercial attractiveness of precisely the projects South Africa should be accelerating. [pretorianews.co.za], [sseg.org.za], [capetownetc.com]
For large commercial and industrial users, the strategic importance is even greater. Private solar, storage and increasingly private wind are no longer merely resilience tools; they are becoming part of industrial competitiveness. NERSA registration data and market reporting show that private generation capacity in South Africa has expanded substantially since the relaxation of licensing thresholds for many projects, with thousands of megawatts added through private investment in recent years. This build-out has materially contributed to reduced pressure on the national system and improved supply stability. [greenbuild...rica.co.za], [mybroadband.co.za], [saaea.org.za]
The true barrier is not technology, but policy fragmentation
South Africa’s principal obstacle to faster embedded generation growth is no longer the cost or maturity of the technology. It is the fragmented and frequently contradictory regulatory environment through which customers must navigate. NERSA clarified in February 2026 that grid-connected embedded generation facilities up to 100 kW must register with the relevant licensed distributor, while larger systems must register directly with NERSA. The regulator also made clear that registration requirements depend on grid connection and installed capacity, not on whether a system exports electricity or uses all of its generation on site. From a system safety and planning perspective, this position is entirely reasonable. [sanews.gov.za]
The difficulty is that a formal national rule does not translate into a uniform market experience. In practice, customers still face a patchwork of municipal procedures, application fees, tariff treatments, meter upgrade rules and approval timelines. Sector reporting has shown that only around 80 to 100 of South Africa’s 257 municipalities had functional rules and tariff structures allowing grid feed-in in early 2025. That means the ability of a homeowner or business to participate in the energy transition still depends heavily on location rather than on coherent national policy execution. [energize.co.za], [pretorianews.co.za], [sseg.org.za]
Even where feed-in is permitted, the economics are often undermined by high upfront compliance costs or billing models that shift recovery into fixed network charges rather than energy consumption. That is why many households and SMEs find that they can invest meaningfully in solar, reduce their grid usage, and yet still face electricity accounts that remain structurally punitive. Such a framework does not encourage disciplined investment in clean distributed generation; it discourages it. At precisely the moment when South Africa needs every additional kilowatt of efficient private generation, the policy environment remains too fragmented and too defensive. [energize.co.za], [capetownetc.com], [energize.co.za]
What municipalities and national government must change
South Africa’s municipalities have historically depended on electricity trading surpluses as a source of revenue. That institutional reality is well understood. But it cannot become the organising principle of the national energy future. The central question for government should not be whether embedded generation threatens existing municipal funding models. The correct question is whether the country can design an electricity framework that preserves network sustainability while also lowering costs, improving reliability and reducing emissions. GoSolr has explicitly called for tariff transparency, clearer separation between infrastructure and energy charges, standardised embedded generation rules and reform of the municipal revenue model that currently leans too heavily on electricity sales. [energize.co.za], [bizcommunity.com]
At a national level, the reform pathway is clear. South Africa needs a single coherent SSEG framework that standardises connection standards, application requirements, processing timelines and core billing principles. It also needs nationally consistent net-billing or feed-in rules so that households and businesses are not excluded simply because of geography. The policy building blocks already exist in the work done around embedded generation regulation and net-billing rules; the failure lies in uneven implementation and insufficient political resolve. [sseg.org.za], [sanews.gov.za]
Why municipal or public BESS could be a breakthrough
The next decisive reform must involve storage. South Africa’s electricity challenge is not only one of generating more energy; it is also one of shifting electricity into the right parts of the day. Rooftop and embedded solar are already reducing midday demand on the grid, but the system still faces steep late-afternoon and evening ramps when solar production falls. The CSIR’s work on South Africa’s changing residual load profile demonstrates this clearly. [csir.co.za], [techcentral.co.za]
This is where battery energy storage systems (BESS) could become transformative — particularly if municipalities and government adopt them not simply as utility assets, but as shared public infrastructure that enables the broader distributed energy ecosystem. A powerful model would be to allow municipal or state-owned BESS platforms to absorb excess midday solar from registered SSEGs and discharge that energy into evening peaks, constrained local feeders, public facilities and lower-income residential areas. Such a system would reduce the need for every household to oversize its own private battery, improve the economics of residential and commercial solar, and allow the benefits of distributed generation to extend beyond affluent customers. [sseg.org.za], [csir.co.za], [cleanenerg...cil.org.au]
Australia’s recent experience again provides a useful point of reference. Its rapid uptake of home batteries and growing emphasis on virtual power plants show that distributed storage can benefit not only the asset owner, but the wider electricity system — provided regulation enables that value to be shared. South Africa should draw directly from that lesson. A municipal BESS strategy would not only support grid balancing; it could also become a meaningful affordability instrument for lower-income communities if excess renewable electricity were stored and redeployed intelligently. [cleanenerg...cil.org.au], [pv-magazin...tralia.com]
The carbon and export implications are becoming impossible to ignore
The decarbonisation case for this transition is compelling. South Africa’s official 2023 Domestic Generation Grid Emission Factor was published at 0.942 tCO2e/MWh, only slightly improved from 0.96 tCO2e/MWh in 2022, reflecting the country’s continued dependence on coal-dominated electricity. Eskom’s own emissions reporting also shows the scale of carbon output still associated with the national system. If South Africa were able to store and shift a greater portion of the renewable electricity already being produced behind the meter, it would reduce the carbon intensity of consumed electricity and lower the average emissions associated with economic activity. [gov.za], [greenbuild...rica.co.za], [eskom.co.za]
The trade implications may be even more urgent. The European Union’s Carbon Border Adjustment Mechanism (CBAM) entered its definitive regime on 1 January 2026, applying initially to sectors including iron and steel, aluminium, cement, fertilisers, electricity and hydrogen. Importers into the EU must now declare embedded emissions and acquire CBAM certificates accordingly, subject to deductions where carbon prices have already been paid and verified. For South African exporters, especially in energy-intensive sectors, the emissions profile of electricity is rapidly becoming a matter of competitiveness, market access and long-term viability. [taxation-c....europa.eu], [dhl.com], [esi-africa.com]
Industry commentary has already warned that South Africa’s high-carbon electricity mix places domestic producers at a growing disadvantage as global markets move toward carbon-conscious procurement and border measures. In practical terms, cleaner electricity is no longer simply a matter of environmental responsibility. It is becoming part of the commercial architecture of export success. A more enabling framework for private renewable generation and public storage would therefore support not only local affordability, but also the competitiveness of South African products in global markets increasingly focused on verifiable carbon performance. [dhl.com], [esi-africa.com], [ecofinagency.com]
Conclusion
South Africa has already demonstrated that households and businesses are willing to invest in energy resilience and lower-carbon power. The missing ingredient is no longer public willingness or technological maturity; it is policy alignment. The country needs municipalities, Eskom and national government to recognise that the future grid will be two-way, more decentralised and more dependent on distributed flexibility than the legacy model ever allowed. The evidence already shows that embedded generation is easing pressure on the national system, that current tariff design is discouraging further progress, and that global trade rules are making carbon intensity an economic issue as much as an environmental one. [csir.co.za], [energize.co.za], [taxation-c....europa.eu]
South Africa must therefore stop treating SSEG as a revenue threat and start treating it as national infrastructure. It should standardise participation rules, reform tariff design, enable public and municipal BESS, and embrace a modern two-way electricity framework that supports affordability, decarbonisation and industrial growth simultaneously. If that shift is made decisively, the country can do far more than stabilise supply. It can build an electricity system that is more competitive, more inclusive and materially better aligned with the realities of the future economy. [sseg.org.za], [gov.za], [cleanenerg...cil.org.au]
About the Author
Werner Hager is the Director of Hager Energy & Automation. He is a Red Seal qualified Electromechanician (South Africa), holds a Mechatronics NQF 4 qualification through Merseta South Africa, and an Advanced Diploma in Automation Engineering from EIT, Australia. With more than a decade of experience in the automotive sector, he has served in a range of roles across Production, Maintenance, and Business Development Management within Tier 1 and Tier 2 companies. His work focuses on practical energy solutions, industrial automation, and the role of embedded generation, storage and intelligent power systems in improving affordability, resilience and sustainability in South Africa’s energy landscape.