Turning data centres into assets for Europe's grid

System operators across Europe are navigating a rapidly changing energy landscape. Electrification is accelerating across transport, heating and industry, while governments are pushing for the rapid deployment of renewable energy. 

At the same time, grid infrastructure built decades ago for a totally different system is beginning to show its age.

Into this already stretched system comes another major source of demand - data centres. The digital infrastructure underpinning AI and cloud computing is expanding rapidly. European data centre electricity consumption is expected to rise sharply, with power demand projected to reach 161TWh by 2030, a 127% increase compared to 2024.

For many, this surge has triggered understandable alarm, but framing data centres purely as a grid problem misses a critical opportunity. 

With the right incentives and market structures, data centres can become some of the most valuable flexible assets in the electricity system.

An ageing, overloaded grid

European electricity grids have been facing an unprecedented surge in supply-side grid connection requests over the past years, largely driven by an increased focus on renewables. Conservative estimates suggest that around 1,700GW of renewable energy across 16 European countries is currently waiting for grid connections. This represents billions in stalled investment and slows progress towards net zero.

Against this backdrop, the growth of data centres is concerning. While connection queues on the demand side are smaller, it serves as a stark reminder of how quickly queue times can get out of hand. 

Across Europe the data centre sector already represents a significant share of electricity demand, with especially high concentrations in certain countries. In Ireland, for example, data centres account for around one-fifth of national electricity consumption, according to Ireland’s Central Statistics Office.

Often the system cannot cope. In major infrastructure hubs such as Dublin, Amsterdam, Frankfurt and London, connection queues have grown rapidly as new hyperscale projects seek access to already constrained grids, with some projects facing queues of upwards of 10 years. 

Regulators are increasingly concerned. Last year, Ofgem put out an urgent response to the "recent surge in demand connection applications", warning that requests now exceed even the most ambitious forecasts for electricity demand.

This trend poses a serious risk to the timely connection of strategically important demand projects that are ready to unlock real benefits for consumers and industry.

Unlike renewable generation projects, whose capacity and timelines are relatively predictable, the expansion of digital infrastructure depends on rapidly evolving technology cycles and supply chains.

In this context, the concerns for network operators are obvious. Data centres are large, power-hungry, inflexible assets, running around the clock to generate as much computing power as possible. 

In a congested network, inflexible demand increases system costs, accelerates grid reinforcement and crowds out other users. 

According to LCP Delta’s calculations, in 2025 alone, transmission system operators across Europe spent around €6bn on balancing costs via ancillary services, a figure that is expected to rise as demand and generation volatility increases.

Yet that narrative overlooks an important reality. Data centres are not just energy-intensive facilities. They are also highly controllable loads, with sophisticated digital management systems and backup power infrastructure already built into their operations.

Those characteristics make them uniquely suited to provide flexibility.

Shifting the mindset

If Europe wants to unlock the full potential of its power system, the conversation around data centres needs to change. Instead of asking how to limit their impact on the grid, network operators should be asking how to integrate them into the system as flexible assets.

This shift in mindset is urgently needed, because we are already seeing real world consequences of a failure to recognise data centre’s potential. 

In the Netherlands, for example, the regulator ACM has excluded data centres from the list of projects considered capable of alleviating grid congestion, highlighting how the potential of flexible demand is still not fully reflected in policy.

Evidence suggests that, if properly incentivised, data centres could provide significant demand side flexibility to support grid stability. They could:

• Offer congestion management by reducing demand during periods of network stress.
• Participate in ancillary service markets, helping maintain system stability.
• Accept non-firm or time-limited connections that make use of spare capacity during off-peak hours.
• By adjusting consumption in response to renewable generation patterns, help absorb surplus wind and solar energy that might otherwise be curtailed.

Several European countries are already experimenting with policies that move in this direction.

Ireland provides one of the most striking examples. Faced with rapidly rising electricity demand from digital infrastructure, regulators introduced new rules requiring large data centres to provide on-site generation or storage capacity capable of matching their power demand. 

These assets must also be able to export electricity back to the grid during periods of system stress, effectively turning data centres into active participants in energy markets.

This approach illustrates what is possible. Rather than relying solely on costly infrastructure expansion, system operators are increasingly exploring ways to use the existing grid more intelligently. Flexible demand, distributed energy resources and digital optimisation tools are all becoming central to this strategy.

Most importantly, this isn’t just theory. As shown by National Grid in a recent trial, data centres are capable of shedding up to 30% of load in roughly 30 seconds to maintain grid resilience. In the UK alone, 6GW of expected data centre deployment by 2030 will add more than 2GW of capacity back to the grid when needed.

But the burden does not solely lie with system operators. Other key pillars that could incentivise data centre flexibility include:

• Sustainability and green credentials: Aligning operations with renewable availability to strengthen ESG performance.
• Reliability and contractual innovation: New contracts and safeguards that allow flexibility without compromising uptime.
• Market accessibility and financial incentives: Easier participation in energy markets to monetise flexible demand.
• Resilience and community value: On-site energy assets and heat reuse that support both grid stability and local communities.

Rich rewards

We can see that the technical capability for data centres to provide flexibility already exists. What is often missing are the regulatory frameworks and market incentives that would encourage operators to actually use it. Unlocking that potential will require closer collaboration between network operators, regulators and the digital infrastructure sector.

For grid operators, this means moving beyond traditional connection models and designing agreements or market mechanisms that reward flexible demand rather than treating all large loads as fixed. For data centre developers, it means integrating flexibility into facility design from the outset rather than as an afterthought. For investors, this represents an asset with the potential for a secondary revenue stream.

The prize could be significant. If properly integrated into electricity markets, data centres could help reduce congestion, defer costly network upgrades and make better use of renewable energy. 

At a time when European grids are under unprecedented strain, they could shift from being seen as a growing challenge to becoming a valuable tool for managing an increasingly complex power system.

Making that transition will not be simple. But if Europe wants to build an electricity system capable of supporting both the digital economy and the clean energy transition, turning data centres from a perceived grid threat into a grid asset is no longer optional.

The next steps are clear: policymakers and regulators should accelerate connection reforms that reward flexible demand, support demonstration pilots that prove the concept at scale, and introduce sustainability-linked incentives that make flexibility commercially attractive. 

With clear metrics and market signals in place, data centre flexibility can move from theory to a core part of Europe’s energy transition.

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