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A UK high-performance computing (HPC) data centre near Newcastle has reduced its reported carbon emissions by around three-quarters while reducing pressure on the electricity system. Stellium Datacenters provides infrastructure for AI and cloud workloads and has implemented an approach aimed at aligning growth in compute demand with grid capacity.
Stellium has changed its electricity sourcing method to match consumption with renewable generation on an hourly basis rather than relying on annual averages. This approach is intended to provide a more granular view of energy sourcing, particularly in the context of increasing electricity demand from AI and cloud computing.
Interest in data centre energy use has increased among policymakers. The UK Environmental Audit Committee has launched an inquiry into the environmental impact of data centres, including electricity and water consumption. In this context, Stellium has worked with renewable electricity supplier Good Energy.
Through this arrangement, Stellium states it now uses a renewable electricity supply matched on an hourly basis, sourced from more than 3,300 UK renewable generators. The company reports an hourly matching score of 95.4%. It also notes that planned additions such as large-scale battery storage could increase this figure to around 97–98%, providing more detailed tracking of renewable supply over time.
Traditional renewable energy accounting methods based on certificates can reflect annual averages rather than real-time matching of supply and demand. Hourly matching is presented as an alternative approach that reflects the timing of renewable generation and consumption more directly.
The change in approach has been referenced by Stellium in discussions with customers, including AI and technology companies with net-zero targets, allowing for more detailed reporting of energy sourcing over time.
The development comes as the UK continues to expand data centre capacity to support AI-related demand. In this context, Stellium’s approach is positioned within broader industry discussions on energy use, infrastructure planning, and emissions reporting.
