Stellium Datacenters, which operates a 4,264 sqm purpose-built facility on Cobalt Park near Newcastle, has switched its site to hourly-matched renewable electricity supplied by Good Energy — a sourcing model that links consumption to specific UK renewable generators in real time rather than against annual averages.
The headline figures, announced on 22 April: a 75% cut in carbon emissions, an hourly matching score of 95.4%, and a direct link to more than 3,300 independent UK renewable generators. The market average for hourly matching sits at around 43%, according to Good Energy. Planned battery storage additions are expected to lift Stellium's score to 97–98%.
The distinction matters because most "100% renewable" data-centre tariffs rely on renewable energy certificates (REGOs in the UK, RECs in the US) that document generation somewhere on the grid across a calendar year. When the sun isn't shining and the wind isn't blowing, a site with a REGO-backed contract can still be drawing heavily on gas-fired generation, and its "100% renewable" label papers over that. Hourly matching collapses that accounting gap by requiring generation and consumption to align at each hour of operation.
Generation sources powering the Stellium site include onshore wind, biomass, hydro, biogas and solar.
Data centres often get bad press for their high, inflexible energy use. But this shows that AI and high-performance computing don't have to come at the expense of the grid or the climate. By switching to hourly-matched renewable power, we've been able to cut emissions dramatically while giving customers the transparency they increasingly demand.
By matching electricity use with renewable generation hour-by-hour, Stellium can show when clean power is actually being used. That kind of transparency cuts carbon emissions, reduces reliance on fossil fuels at peak times and proves that digital growth and a resilient energy system can go hand-in-hand.
The timing lines up with a UK political context in which data-centre power consumption is under increasing scrutiny. MPs on the Environmental Audit Committee recently opened an inquiry into the environmental impact of data centres, including their electricity and water use and the pressure they place on local grids. With the AI buildout projected to require substantial new capacity in the coming years, hourly matching gives operators a defensible answer to questions that annualised accounting cannot handle.
Stellium says its commercial conversations have shifted as a result, particularly with customers pursuing strict net-zero reporting obligations who need to show which renewable assets powered their compute and when.
