By Joubert Roux – co-founder and chair of CHARGE

Earth Day, observed annually on 22 April, has traditionally been a moment to reflect on environmental impact. That remains important, but the conversation can no longer be only about impact. It must evolve to focus on the systems that drive it.

A conventional petrol vehicle driving 25,000 kilometres a year produces roughly 4.4 metric tonnes of carbon dioxide. Across millions of vehicles, the scale of emissions is significant. But this is not just a South African challenge. Across global transport systems, there is a growing recognition that electrification alone is not enough. It must be paired with scalable, low-carbon infrastructure, particularly for freight and long-distance mobility.

Electric vehicles are often presented as the solution, yet the source of energy matters just as much as the vehicle itself. If powered by a coal-heavy grid, the emissions benefits of electrification are reduced. The real opportunity lies not only in switching to electric mobility, but in fundamentally changing how that electricity is produced and delivered.

This is where the equation shifts.

South Africa has some of the highest solar irradiance levels in the world. Charging infrastructure that generates power on-site, using solar energy and battery storage, removes dependence on both imported fuel and a constrained national grid. It creates a system where energy is produced at the point of use, predictably and sustainably. In that model, an electric vehicle is no longer simply an alternative vehicle. It becomes part of a fundamentally different energy system.

What once sounded like a future concept is now moving into execution. South Africa’s first off-grid, solar-powered charging site in CHARGE Wolmaransstad has already demonstrated that ultra-fast charging using 100% renewable energy is viable in local conditions. The next phase is underway. Along the N3 corridor between Johannesburg and Durban, new sites, including CHARGE N3 Tugela in KwaZulu-Natal and CHARGE N3 Roadside in the Free State, are set to come online next month, extending this model across one of the country’s most critical logistics routes.

The implications are significant. A network of solar-powered charging stations, built corridor by corridor, has the potential to transform South Africa’s national highways into a low-emissions transport system. Passenger vehicles, freight trucks, and buses could move along these routes powered by locally generated energy, with near-zero operational emissions at the point of charge.

Just as importantly, the economics are beginning to align with the ambition. Battery costs have declined dramatically over the past decade. Solar is now the cheapest source of new electricity in many parts of the world, including South Africa. For fleet operators, the shift from volatile imported diesel to fixed-cost, locally generated solar power is no longer a question of environmental commitment. It is increasingly straightforward arithmetic.

For individual drivers, the same logic is emerging over time. While upfront costs remain higher, the long-term cost of operating an electric vehicle continues to improve as technology advances and infrastructure expands.

None of this suggests the transition will be without constraint. Electric vehicles are not yet accessible to all consumers, and charging infrastructure is still being rolled out. There remain routes and use cases where the timing is not yet right. These are, however, the expected friction points of any large-scale infrastructure shift, not arguments against the direction of travel.

If anything, repeated fuel price shocks are accelerating the urgency of change. Each increase reinforces the same underlying reality that South Africa remains exposed to global oil markets in a way that is economically and strategically unsustainable.

Three weeks ago, South Africans were bracing for a near-R10 per litre increase in the price of diesel. Government intervention softened the immediate impact, but the structural issue remains unchanged. The country imports most of the fuel that powers its transport system, priced in US dollars and sourced from markets beyond its control - with May predicted to bring more major fuel hikes.

Localising energy for transport is therefore no longer just an environmental ambition. It is a pathway to greater resilience, cost stability, and long-term competitiveness.

Earth Day, then, is no longer only about measuring environmental impact. It is about measuring progress  - the distance between what is possible and what is being built to support the country’s transport energy transition. In South Africa, that distance is closing.

The resource exists. The technology is proven. The demand is emerging. And the infrastructure is beginning to take shape. A carbon-neutral national highway is no longer a thought experiment. It is being built.