At Khoemacau Copper Mine, we are implementing a structured energy management program to reduce energy consumption, lower greenhouse gas emissions and strengthen climate resilience across our operations.
By improving efficiency, upgrading technology and progressing renewable energy opportunities, we aim to deliver measurable environmental, financial and operational benefits while supporting MMG’s long-term decarbonisation goals.
Energy use is one of the largest operating costs at Khoemacau, driven by crushing and grinding at the process plant, underground ventilation and ore haulage. Diesel use in the mining fleet contributes directly to Scope 1 emissions, while electricity sourced from a predominantly coal-fired grid drives Scope 2 emissions.
Key challenges include ageing equipment, limited ventilation controls, skills gaps in energy management
and increasing physical climate risks such as heat extremes, flooding and water scarcity. To remain competitive and aligned with our sustainability goals and international ESG expectations, reducing energy intensity and improving efficiency is essential.
We established a dedicated Energy Management Program supported by cross-functional teams and site-based energy champions, and installed energy meters across key areas to improve monitoring and accountability.
To identify efficiency gains, we commissioned studies on Ventilation-on-Demand and Variable Speed Drive fans to reduce unnecessary airflow and lower underground ventilation demand. We also conducted electricity and diesel consumption audits and tightened controls on fuel use.
The site is progressing feasibility studies for a 20+ MW solar photovoltaic power station and potential battery storage, to diversify and decarbonise our energy supply.
These initiatives were supported by strong collaboration across Engineering, Mining, Processing, Projects, Finance and Sustainability, as well as engagement with the Botswana Power Corporation, government agencies, OEMs and consultants.
The program has laid a solid foundation for long-term decarbonisation and improved energy performance. We now have better visibility and control of electricity and diesel use, strengthened Scope 2 emissions reporting, and more stable operating conditions with reduced equipment wear. A clear pathway for renewable energy integration and future electrification of major equipment is also taking shape.
While behavioural change and resourcing remain ongoing challenges, the program has demonstrated the value of cross-functional collaboration and systematic energy management in driving performance and supporting long-term sustainability at Khoemacau.