Energy has quietly become one of the most decisive factors shaping mining competitiveness. Beneath the headlines of rising copper and cobalt demand lies a more immediate operational reality: keeping the lights on is becoming more expensive, less predictable and increasingly complex.
By Heleen Katja Tshibumbu
For decades, mining operations across northern Zambia and the southern Democratic Republic of Congo (DRC) have relied on a combination of grid-supplied hydropower and diesel-based backup generation. That model is now under strain. Hydropower output has become less reliable due to recurring drought conditions and infrastructure limitations, while diesel (long considered a dependable fallback) is emerging as a costly and volatile liability. (IEA, 2022).
The latest surge in global oil prices, driven in part by geopolitical instability in the Middle East and ongoing risks to key supply routes such as the Strait of Hormuz, has brought this vulnerability into sharp focus. For Copperbelt operators, far removed from global oil hubs and dependent on complex overland fuel logistics, the impact is amplified. Diesel is no longer just an operational input; it is a strategic exposure.
The economics are difficult to ignore. Diesel-generated electricity in remote African mining environments typically costs between $0.15 and $0.50 per kilowatt-hour, with landlocked regions such as the Copperbelt often sitting at the upper end of that range due to transport and handling costs. These figures are not static. They’re quite fluid and move with global oil prices, exchange rates and supply chain disruptions, introducing a level of cost volatility that complicates planning and erodes margins. (IEA, 2022).
The numbers tell a compelling story. Solar PV combined with battery storage can now deliver electricity at between $0.06 and $0.20 per kilowatt-hour in many African contexts, while hybrid systems integrating renewables with diesel typically range between $0.08 and $0.25 per kilowatt-hour (IRENA, 2023; World Bank, 2020; IFC, 2019). Even at the upper end, these costs compare favourably to diesel-only generation, and at the lower end they represent a step change in energy economics.
Across the Copperbelt itself, early examples of this transition are already visible. In Zambia, First Quantum Minerals has integrated large-scale solar generation into its operations at the Kansanshi Mine, reducing reliance on grid and diesel supply while improving energy security. Similarly, Barrick Gold Corporation has advanced renewable energy integration at the Lumwana Mine, where solar power is being deployed to stabilise energy supply and offset fuel consumption. In the DRC, operators in the Kolwezi region are increasingly evaluating hybrid systems as grid constraints and diesel costs converge, signalling a broader regional shift.
For a Copperbelt mine currently producing power at around $0.30 per kilowatt-hour using diesel, a transition to a hybrid system could reduce costs to approximately $0.15 per kilowatt-hour. In more optimised scenarios, particularly where solar resources are strong, costs can fall closer to $0.10 per kilowatt-hour. This translates into potential savings of between 50% and 70% per unit of electricity generated, fundamentally reshaping the cost base of mining operations.
To be clear, the shift is not about eliminating diesel altogether. In the Copperbelt context, where reliability remains vital, diesel will continue to play a role. The objective is to reduce dependence on a single, volatile energy source. Hybridisation provides a practical pathway to achieve this. By integrating solar and, where viable, wind generation into existing energy systems, mines can significantly reduce fuel consumption while maintaining system stability.
This approach also enhances overall efficiency. Diesel generators operating alongside renewable energy sources can run at more consistent and optimal loads, reducing fuel consumption per kilowatt-hour and extending equipment lifespan. At the same time, the proportion of energy derived from fuel, unfortunately subject to global price volatility, is reduced, improving cost predictability. Research by the Rocky Mountain Institute highlights that hybrid renewable systems in mining applications can deliver both cost savings and improved operational performance when properly integrated (RMI, 2020).
For the Copperbelt, the case for solar integration is particularly strong. The region benefits from high levels of solar irradiation, making it well suited to large-scale PV deployment. The modular nature of solar installations allows mines to scale capacity in line with demand, while battery storage enables greater flexibility in managing load profiles and intermittency. Wind, although more site-specific, can further enhance system resilience where conditions permit.
Beyond cost and efficiency, energy diversification strengthens security of supply. By reducing reliance on diesel deliveries, mining operations become less exposed to logistical disruptions and geopolitical risks. This is particularly relevant in the DRC, where infrastructure constraints can complicate fuel transport. At the same time, the broader industry context is shifting. As global mining companies face increasing pressure to reduce emissions and align with decarbonisation goals, energy sourcing is becoming a central component of corporate strategy. Hybrid systems offer a practical and immediate pathway to lowering emissions intensity without compromising output (Bloomberg NEF, 2023).
Adoption is not without challenges. Renewable energy systems require upfront capital investment, and integrating hybrid solutions introduces a massive degree of technical complexity. Historically, these factors have slowed uptake. But we have to keep in mind that the landscape is evolving. Financing models such as power purchase agreements and energy-as-a-service structures are reducing the need for upfront capital, while advances in control systems are simplifying integration and improving reliability.
What is increasingly clear is that the status quo is no longer sustainable. Diesel, once the default solution to energy insecurity, is now a source of both cost pressure and operational risk. The current volatility in global fuel markets has simply accelerated a shift that was already underway.
For the Copperbelt, the implications are significant. As demand for its minerals continues to grow, so too will the importance of cost competitiveness and operational resilience. Energy sits at the centre of both. Mines that move decisively to diversify their energy mix stand to benefit from lower costs, greater stability and improved alignment with global market expectations. And those that do not may find themselves increasingly exposed to price shocks, supply disruptions and a rapidly shifting competitive landscape.
The Copperbelt is defined by its resource wealth, but the next phase of advantage may not be determined solely by what lies beneath the ground, but by how effectively it is powered above it.
