The story of Optimal Energy and the Joule electric car offers valuable insights for anyone working in automotive manufacturing today. What drove a team in South Africa to believe they could compete with global EV manufacturers? What technical decisions shaped their approach? And what can today’s automotive sector learn from their experience with early electric vehicle adoption?
Why South Africa targeted electric vehicles in the mid-2000s
The Joule didn’t emerge from consumer demand or market trends. The founding team approached electric mobility from a systems engineering perspective after completing work on the Southern African Large Telescope (SALT).
Energy constraints framed the entire project. Peak oil concerns, price volatility, and transport’s massive share of total energy consumption made electrification a logical solution. About one-third of global energy consumption happens in transport, making it a prime target for fundamental change.
The team recognised that incumbent automotive manufacturers in 2004 and 2005 weren’t treating electric vehicles as a serious threat. That created an opening. But they also studied why earlier EV attempts had failed. Lead-acid batteries had killed previous EV projects. The breakthrough would require better battery technology to enable viable battery electric vehicles.
Battery strategy shaped the EV ecosystem
Battery capability became the central technical bet. Without significant improvements in lithium battery technology, the rest of the vehicle design wouldn’t matter. The team travelled to China to assess large-scale new energy vehicle battery development programmes and evaluated high-efficiency electric motors globally.
South African universities provided critical support. The University of Stellenbosch brought electric motor research expertise. The University of the Western Cape, initially focused on hydrogen fuel cell research, shifted resources toward battery development. This localised some of the most expensive components while keeping the project grounded in realistic capability.
The battery pack in the final Joule prototypes ran at 384 volts with 32 kWh capacity, paired with a 70kW electric motor. The cells performed so well that 10 years after the project closed, they could still be repurposed for energy storage applications. This early attention to battery electric vehicle technology positioned the Joule ahead of many competitors in the emerging EV landscape.
From innovation fund to real prototypes
Turning the concept into a funded venture took 18 months of back-and-forth with South Africa’s Innovation Fund. The founding team lived off personal savings during this period while refining both the technical architecture and the commercial narrative.
Approval came in December 2005 with 15 million rand in grant funding, enough for roughly three years of work. But funding came with strings attached from day one. The Innovation Fund wanted equity in Optimal Energy, not just to provide grants. These governance conditions would later influence strategic options as the company scaled.
The first office in Cape Town’s Woodstock neighbourhood reflected the scrappy reality of early-stage ventures. The team handled everything themselves, from detailed engineering work to cleaning. This lean phase created tight feedback loops and reinforced shared ownership across the group.
Automotive design changed the technical direction
By 2006, the team had developed significant technical depth. They understood battery packaging, thermal management, drivetrain architecture, and systems integration for new energy vehicles. But a critical gap remained.
Keith Halford joined as automotive designer, bringing experience from Jaguar including work on the XJ220. His contribution went beyond styling. He introduced a fundamental reframing: cars are emotional products. Proportions, stance, and visual balance influence buying decisions as much as specifications.
This forced a strategic shift. Design couldn’t be applied at the end as decoration. It became a system requirement integrated from the beginning. The size ended up similar to a Mercedes A-Class but wider and more upright, with a large boot designed to fit a washing machine.
Paris Motor Show launch and global interest
By 2008, Optimal Energy had progressed far enough to attempt a public launch. The team decided to target the Paris Motor Show rather than limiting themselves to the South African market. This put them directly in the global spotlight.
Two weeks before Paris, they held a local launch in Cape Town with the Department of Science and Technology. The South African launch honoured local partners and supporters before taking South Africa’s first electric car to the international stage.
The Paris reception exceeded expectations. Eleven distributors from 32 different countries approached Optimal Energy wanting distribution rights. Even at the model stage, the spec sheet and concept generated serious commercial interest among potential EV manufacturers and distributors. Europe was pushing electric vehicles hard in 2008. The UK alone had 23,000 public EV charging stations and offered a £5,000 subsidy for electric car purchases.
This market feedback led to a pivotal decision. The team committed to scaling to 50,000 units per year and full monocoque construction. The UK would become the primary export market, driving on the same side of the road as South Africa. The interior design allowed for left-hand or right-hand drive configurations to access broader European markets where EV adoption was accelerating.
EV manufacturing challenges in South Africa’s automotive sector
Building an electric vehicle in South Africa presented unique manufacturing challenges. The team needed to think through the entire EV value chain, not just vehicle assembly. This included:
Component sourcing strategy: Import battery cells initially, then localise cell manufacturing later once volumes justified it. Partner with global suppliers for specialised components while building local assembly capability within South Africa’s established automotive manufacturing hubs.
Assembly line design: Work with German engineering firm EDAG on plant design for both vehicle assembly and battery pack assembly. The modular approach would support production flexibility as the EV market evolved and new EV models entered production.
Logistics planning: Map distribution routes from East London Harbour to European markets via Durban and Zeebrugge. Detailed costing came from partners like DB Schenker who handled automotive logistics daily.
Testing and homologation: Partner with IDIADA in Spain for safety testing and regulatory compliance across different markets. Meeting European standards would open access to the largest potential customer base for electric vehicle sales.
The final business plan in 2010 called for 9.2 billion rand to reach full industrialisation. This included the assembly plant in East London, supply chain development, safety testing, homologation across markets, and working capital. Roughly one-third could come from loans, one-third from government incentives available through programmes like the Automotive Production Development Programme, and one-third from actual investment capital.
Electric buses and commercial vehicles
As funding challenges mounted in 2012, Optimal Energy explored alternative applications for their electric vehicle technology. The team engaged with bus manufacturers including Busmark to develop electric bus solutions for South Africa’s public transport systems. Cities like Cape Town and Durban expressed interest in electric buses for their MyCiti and Riva transit systems.
The alternative business plan focused on a 280-million-rand investment to develop commercial electric vehicles rather than private passenger vehicles. This included retrofitting existing buses with electric drivetrains and developing new electric bus designs suited to South African urban transport needs. The minibus taxi industry, which moves millions of South Africans daily, represented another potential application for last-mile delivery services and urban transport electrification.
But even this scaled-down approach couldn’t secure the required funding. The IDC remained unconvinced about the commercial viability, and the window for Optimal Energy closed.
Why the Joule Project closed
The 9.2-billion-rand price tag for full-scale automotive production frightened potential funders. The IDC, burned by losses on the pebble bed reactor project when government cancelled it, insisted on clear government funding commitments before investing more. But those commitments never materialised.
The Innovation Fund transitioned into the Technology Innovation Agency (TIA), bringing different priorities and political dynamics. The new structure favoured supporting existing automotive manufacturers in South Africa to localise technologies rather than backing a potential competitor to established OEMs.
By 2012, Optimal Energy faced a funding deadline without the required partnerships or government backing. The company closed despite having four drivable PEV prototypes, extensive technical documentation, and proven international interest from EV manufacturers and distributors.
The vehicles and intellectual property eventually went to Nelson Mandela University for research purposes. Some physical tooling was destroyed. The battery cells were repurposed years later, testament to the quality of the original engineering decisions.
South Africa’s EV landscape: Then and now
The contrast between 2008 and today’s electric vehicle market reveals how dramatically the automotive industry has transformed. When Optimal Energy launched the Joule, electric vehicle sales globally numbered in the thousands. By 2023, global new energy vehicle sales exceeded 13 million units, with battery electric vehicles and plug-in hybrid electric vehicles now representing a significant share of new vehicle sales in major markets.
Current EV adoption in South Africa
According to data from the National Association of Automobile Manufacturers of South Africa (NAAMSA), EV sales in South Africa remain modest compared to global markets. In 2022 and 2023, battery electric vehicles and hybrid electric vehicles sold in South Africa numbered in the low thousands, representing less than 1% of total car sales in the market.
Several factors constrain EV adoption within South Africa:
Limited charging infrastructure: Unlike the UK’s 23,000 charging stations in 2008, South Africa’s public EV charging network remains sparse. Charging stations in South Africa concentrate in major urban centres, making long-distance electric vehicle travel challenging.
Vehicle pricing: Most EVs in South Africa are imported premium models. Without local EV manufacturing, prices remain high compared to ICE (internal combustion engine) vehicles, limiting adoption among private passenger vehicles and commercial fleets.
Grid constraints: South Africa’s electricity supply challenges raise questions about the feasibility of electric vehicle charging infrastructure at scale, particularly for applications like electric buses and commercial delivery services that require reliable charging.
Import dependence: South Africa’s automotive sector assembles vehicles for major global manufacturers, but no local EV manufacturing currently exists. All battery electric vehicles sold in South Africa arrive as fully imported units, missing the opportunity to build local EV value chains.
What changed in the global EV market
While South Africa’s EV ecosystem developed slowly, other markets accelerated dramatically:
China’s new energy vehicle dominance: Chinese manufacturers like BYD have become global leaders in electric vehicle production. BYD’s expansion throughout Africa and into European markets demonstrates how strategic government support and patient capital can build world-class EV manufacturers. The company’s success validates the early vision that battery technology would determine EV viability.
European EV adoption: European markets that showed early interest in the Joule have become major EV markets. Stringent emissions regulations and continued subsidies drove rapid growth in electric and hydrogen-powered vehicles across the EU.
Established OEMs pivot: Traditional automotive manufacturers that seemed complacent in 2005 have invested billions in electric vehicle platforms. The transition from ICE vehicles to battery electric vehicles and plug-in hybrid electric vehicles now defines automotive strategy for every major manufacturer.
Battery costs decline: Lithium battery prices dropped dramatically between 2010 and 2024, making electric vehicles economically competitive with ICE vehicles in many markets. This cost reduction validated Optimal Energy’s early focus on battery technology as the critical enabler.
African automotive manufacturing and the EV opportunity
South African automotive manufacturing represents one of the continent’s most established industrial sectors. The country’s automotive production development programme has supported vehicle assembly for decades, making South Africa an export hub for global OEMs serving African and international markets.
However, the transition to electric vehicles presents both opportunities and risks for African automotive manufacturing hubs:
Manufacturing capability exists: South Africa proved it can design and build complex automotive systems. The Joule demonstrated that local engineering talent can compete globally. Today’s automotive manufacturing industry in South Africa has the technical foundation to support EV component manufacturing and assembly.
Supply chain gaps: The EV value chain requires different components than ICE vehicles. Battery cell production, electric motor manufacturing, and power electronics represent new supply chain requirements. Building these capabilities within South Africa requires coordinated investment in EV manufacturing infrastructure.
Regional market potential: The African market for vehicles continues growing. While current EV sales throughout Africa remain minimal, falling battery costs and improving charging infrastructure could accelerate adoption. Positioning South African automotive manufacturing to serve this emerging demand makes strategic sense.
Skills and expertise: Decades of automotive engineering experience in South Africa translates well to electric vehicle manufacturing. The precision assembly, quality control, and systems integration skills that existing automotive manufacturing hubs possess apply directly to EV production.
Building EV assembly systems today
Modern EV manufacturing in South Africa faces different conditions than Optimal Energy encountered in 2008. Battery technology has matured significantly. Global automotive supply chains now include established EV component suppliers. And automotive manufacturers worldwide are investing heavily in electric vehicle production capacity.
What hasn’t changed are the fundamental engineering challenges around precision assembly, quality control, and manufacturing efficiency for automotive assembly systems. Battery pack assembly requires careful attention to tolerances, thermal management, and safety protocols. E-axle assembly handles heavier components than traditional axles due to integrated motors. Every EV component assembly line needs robust traceability and process security.
The EV value chain and manufacturing requirements
Successful investment in EV manufacturing requires understanding the complete value chain for new energy vehicles:
Battery pack assembly: Cell sorting, module assembly, pack integration, thermal management systems, and battery management electronics all demand precision manufacturing and strict quality control.
Electric motor production: High-efficiency motors require precise winding, rotor assembly, and testing. Quality variations directly impact vehicle performance and reliability.
Power electronics: Inverters, converters, and charging systems represent complex assemblies requiring clean room conditions and extensive testing.
E-axle and drivetrain: Integrating electric motors, gearboxes, and traditional axle components creates new assembly challenges. Component weights increase significantly, requiring adjusted handling and assembly processes.
Vehicle integration: Final assembly of electric vehicles differs from ICE vehicles. Fewer mechanical components simplify some aspects, but electrical systems complexity increases. Quality assurance and traceability become even more critical.
At Jendamark, we’ve spent decades developing automotive assembly systems that address these precise requirements. Our EV component assembly solutions serve global OEMs and Tier 1 suppliers building battery packs, electric motors, e-axles, and complete vehicle systems. The engineering lessons from South African electric vehicle development inform how we approach manufacturing challenges today.
Supporting South Africa’s EV future
The question facing South Africa’s automotive industry isn’t whether electric vehicles will dominate global markets. That transition is already happening. The question is whether South African automotive manufacturing will participate in building EVs or only assemble vehicles designed and engineered elsewhere.
Several pathways could strengthen South Africa’s position in the EV ecosystem:
Component manufacturing: Even without full vehicle assembly, producing EV components for global supply chains creates value. Battery pack assembly, wiring harnesses, structural components, and sub-assemblies all represent opportunities.
Commercial vehicle focus: Electric buses, delivery vans, and commercial vehicles suited to defined routes and centralised charging may offer faster paths to viability in the South African market than private passenger vehicles.
Regional assembly hub: As EVs in South Africa and throughout Africa gain adoption, local assembly capacity positioned to serve regional markets makes economic sense. Existing automotive manufacturing hubs in Port Elizabeth, Durban, and Pretoria could pivot to EV assembly.
Technology localisation: Supporting local development of EV-specific technologies through university partnerships and research institutions builds long-term capability. The approach Optimal Energy took with Stellenbosch and Western Cape universities remains valid.
Policy alignment: Clear government support through the automotive production development programme, qualifying investment spending on electric vehicle manufacturing, and existing support under the automotive sector incentives could accelerate private investment in EV manufacturing.
Whether you’re planning to scale EV production or retrofit existing assembly lines for electric vehicle components, the technical fundamentals remain consistent. Start with clear requirements. Identify critical dependencies early. Build in flexibility for evolving standards and component changes. And work with partners who understand both the precision required and the manufacturing realities of automotive assembly systems.
The Joule showed that South African engineering capability could compete globally in electric vehicle development. Today’s challenge isn’t proving technical capability. It’s building the manufacturing infrastructure and sustained partnerships to turn that capability into production vehicles at scale.
Ready to discuss your EV component assembly requirements? Jendamark’s engineering team brings decades of experience delivering automotive assembly systems to global manufacturers. From battery pack lines to complete powertrain assembly, we understand the precision and process control that electric vehicle manufacturing demands. Contact our team to explore how we can support your production goals.
This article is based on a Jendamark podcast. Our global team has decades of experience in automotive assembly automation for global OEMs. Learn more about our approach to EV manufacturing and explore our component assembly solutions.
