Data centre batteries could cut peak grid imports by up to 15%, study finds

On-site batteries at data centres could lower their peak grid imports by 10% to 15%, according to a study covered by Reuters. The team at WU Vienna University of Economics and Business analysed energy use across 96 UK data centres, using data from UK Power Networks. The finding matters because it reframes data centres as a source of grid flexibility rather than pure additional load.

The mechanism is straightforward. Batteries installed on site can supply part of a facility's power during peak demand windows, easing pressure on constrained local networks. Clean generation in or near the site cuts grid dependence further. The Financial Times reported that major technology firms are already increasing investment in storage to manage their power exposure, with lead author Behnam Zakeri describing an emerging 'nexus' where AI and energy storage support each other.

What this means for UK buyers

The near-term signal here is not a price move. It is a change in how grid connections and network charges may be assessed. If regulators reward flexibility, sites that can shift or shave demand stand to connect faster and pay less at peak. That logic extends beyond data centres to any business weighing on-site storage against rising network costs.

UK baseload day-ahead power over the past year frames the peak-import cost that on-site batteries are designed to shave.

The study, published in Energy and Climate Change, argues connection frameworks should prioritise projects that deliver measurable system benefit. Utility Week noted its call to remove regulatory barriers that stop data centre batteries and on-site generators from providing grid services. The practical decision points for buyers considering the same approach:

• Battery capacity sized to cover peak import windows
• On-site or nearby clean generation to cut grid reliance
• Demand flexibility, shifting load to off-peak or high-renewable periods
• Connection terms that reward measurable system benefit
• Compensation routes for reducing usage at peak

The scale context is significant. The study cites International Energy Agency projections that global electricity demand from new data centres may double by 2030, with US data centres potentially reaching up to 17% of national consumption, roughly 60% above earlier estimates. The core constraint, the researchers argue, is not the cost of electricity but the speed at which reliable power can be connected.

Watch how UK connection reform develops. If Ofgem and National Grid ESO move to favour flexible, storage-backed projects in the connections queue, the commercial case for on-site batteries strengthens across the wider industrial and commercial base, not just for hyperscale operators. That is the shift worth tracking through your next renewal cycle.