Energy efficiency is becoming an increasingly important factor in industrial competitiveness, influencing not only environmental performance but also production costs, productivity and long-term investment decisions.
For the aluminium industry, where electricity-intensive primary production is followed by multiple stages of processing, manufacturing and recycling, improving energy performance presents opportunities across the entire value chain.
Recent findings from the International Energy Agency (IEA), alongside developments in industrial energy policy, highlight how manufacturers are increasingly treating energy efficiency as a strategic business priority.
From Energy Savings to Manufacturing Competitiveness
According to the IEA's Energy Efficiency 2025 report, industry accounted for nearly 40% of global final energy consumption in 2024 and contributed approximately two-thirds of the growth in global final energy demand between 2019 and 2024.
A separate IEA analysis published in March 2026, based on a survey of 1,000 industrial companies across 14 countries, found that nearly 40% of respondents ranked energy efficiency as their primary response to rising energy costs. The findings underline the growing importance of energy performance in managing operating costs, protecting productivity and responding to energy-price volatility.
The IEA's Energy Technology Perspectives 2026 further identifies energy costs as a major factor in the competitiveness of energy-intensive upstream industries, including aluminium, steel and chemicals. Under certain production conditions, energy can account for more than two-thirds of total costs. This proportion varies considerably by process and location, but it highlights why access to affordable energy and improvements in energy efficiency remain important competitive considerations.
For aluminium producers and processors, the challenge is therefore not simply to consume less energy, but to use it more effectively while maintaining production quality, reliability and output.
Energy Efficiency Starts with Primary Aluminium Production
Primary aluminium smelting remains one of the industry's most electricity-intensive processes.
The Hall–Héroult process, the dominant commercial method of primary aluminium production, relies on electrolysis to convert alumina into aluminium metal. Electricity consumption is consequently a major component of smelting economics.
Improvements in electrolysis cell performance, operational control and production efficiency can help reduce electricity consumption per tonne of aluminium produced.
The IEA has identified advanced cell configurations, improved electrode designs and other electrolysis innovations as potential avenues for greater energy efficiency. However, some technologies remain under development and require further demonstration before widespread commercial deployment.
Another area attracting attention is electricity demand flexibility.
According to the IEA's Electricity 2026 report, aluminium smelting represents a substantial source of industrial electricity demand, but only a limited share of its potential is currently used for demand-response services.
With appropriate technologies and operating conditions, greater flexibility could help aluminium producers respond to changing electricity-system requirements and support the integration of variable renewable energy. Such flexibility must nevertheless be managed within the strict operational requirements of the electrolysis process.
Together, improved process efficiency and more effective electricity management offer opportunities to strengthen the competitiveness of primary aluminium production.
Beyond Smelting: Energy Efficiency in Processing and Recycling
Energy efficiency is equally relevant to downstream aluminium manufacturing.
Melting, casting, rolling, extrusion, heat treatment and other processing operations all require energy. Improving furnace performance, optimising thermal management, upgrading equipment and introducing digital process monitoring can help manufacturers reduce energy losses and improve operating efficiency.
For aluminium processors, these improvements can also contribute to more consistent production, lower operating costs and better material utilisation.
Recycling adds another important dimension.
According to the International Aluminium Institute (IAI), recycled aluminium production requires approximately 95.5% less primary energy than primary aluminium production under the lifecycle assessment conditions used in its comparison.
The underlying datasets estimate primary energy requirements of approximately 186 GJ per tonne for primary aluminium, compared with 8.3 GJ per tonne for recycled aluminium. These are lifecycle comparison figures rather than current annual operating averages.
The energy advantage of recycling reinforces the importance of efficient scrap collection, sorting, remelting and alloy management.
For manufacturers, the opportunity lies in combining process improvements with better material recovery. Reducing production losses and returning suitable scrap to the manufacturing process can help lower the overall energy requirements associated with aluminium supply.
