Data Centres: Turning Grid Constraints into a Lever for Europe’s Energy Transition

At a time when artificial intelligence (AI) is becoming widespread, data centres are emerging as critical infrastructure. In a context where power systems are already under strain and expectations for decarbonization are high, their electricity consumption in Europe is expected to double or even quadruple by 2035. Despite their economic and strategic importance, the development of new data centre projects is currently hindered by limited available grid capacity and increasing local opposition.

In response, European Member States are taking steps to shorten connection lead times (which can extend 7 to 10 years) and to preserve the wider economy electrification requirements (notably through moratoriums). However, the fragmentation of European regulatory frameworks and their misalignment with the specific constraints of data centres are currently preventing the sector from achieving sustainable growth.

The industry as a whole faces a dual challenge: connecting new data centres at a pace compatible with Europe’s digital sovereignty objectives, while avoiding cost increases for other users and safeguarding decarbonization efforts.

By thoroughly analysing the flexibility potential of data centres, this study shows that they can become real assets for the power system, actively contributing to system balance. It highlights the key role of the different flexibility dimensions—temporal, geographical, and load shedding—as well as the regulatory changes needed to fully unlock this potential.

Flexibility: Turning a Constraint into an Asset for the Power System

The analysis demonstrates that, instead of being only an additional load on the grid, data centres can contribute to power system flexibility by adjusting part of their energy demand over time and across locations, without compromising service quality.
By optimising computational workload allocation, managing cooling systems, and making controlled use of backup systems, data centres can provide services comparable to batteries (temporal load shifting) and interconnectors (geographical load shifting).

The study models two flexibility scenarios:

• Mandated Flexibility scenario: Through Flexible Connection Agreements, data centres commit to reducing their electricity consumption during rare peak periods when system stress is highest, in exchange for accelerated connection timelines.  
• Open-EU Flexibility scenario: Data centres continuously optimise their power demand to adapt in real time to system conditions, without affecting business operations.

The results are clear: even limited but well-targeted flexibility has a significant impact on system sizing and reduces the need for new generation capacity, lowering overall costs for all consumers.

Quantified Benefits for the System

The study points to levels of impact that are highly consequential for decision-making:

Beyond these figures, the study highlights the critical role of flexibility in enabling accelerated data centre deployment. It also helps reduce grid congestion and associated management costs, which are otherwise passed through to all consumers via network tariffs.

A Regulatory Imperative: Evolving Frameworks to Unlock Flexibility

While the technical and economic potential of flexibility is significant, it remains largely underutilised. This primarily reflects regulatory and market barriers, including inconsistent and often infeasible connection agreement specifications for data centres limited granularity in accounting rules, and weak price signals. 

The study highlights the need for a transparent, harmonised, and flexibility-oriented European regulatory framework, built on several key levers:

• Integrating data centres into European and national grid planning, with improved transparency on current and future connection capacity, and by aligning connection procedures to steer projects toward the most suitable locations. 
• Harmonising Flexible Connection Agreements (FCAs) at the European level through standardised models tailored to data centres and co-developed by regulators, power system operators, and the data centre industry. These models should define minimum flexibility requirements consistent with operational capabilities and necessary guardrails, while providing the predictability needed to secure investments.
• Strengthening economic signals (carbon accounting, market prices, network tariffs) to incentivise demand shifting towards locations and time periods with abundant availability of low-carbon electricity. 
• Scaling up flexibility mechanisms across both supply and demand for all grid users—including data centres—through, for example, more granular pricing zones, dynamic tariffs, or the use of flexibility aggregators.

Europe is at a pivotal moment where digital ambitions and energy transition must advance together. Data centres, central to this transformation, are not destined to be a burden on power systems. On the contrary, leveraging their flexibility potential can reduce the need for peak thermal capacity and support the integration of renewable energy.
Data centre flexibility can lower operational costs and the environmental footprint of the power system—provided they are recognised, incentivised, and integrated into project development.

This study equips public and private decision-makers with an analytical framework, key metrics, and actionable recommendations to adapt regulation, connection models, and operational practices—thereby reconciling the acceleration of digital infrastructure with climate objectives.

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