The rapid deployment of data centers is placing substantial new loads on electricity systems that, in many cases, are not expanding at the same pace. An analysis published by Ember in October 2026 examines the extent to which data centers can provide grid flexibility through two mechanisms: shifting computing workloads and using behind-the-meter generation or storage. The study covers nine markets across the United States, Europe, and Southeast Asia, with particular relevance to Ireland, the United Kingdom, and Germany.

Data centers could account for a significant share of peak electricity demand as their capacity expands. In Ireland, one of Europe’s leading data center hubs, they already account for approximately 19% of peak demand. In January 2025, when system demand peaked at 6 GW, data centers accounted for an estimated 1.1 GW. Ember projects that this share could rise to 24% by 2030, with data center demand reaching 1.6 GW against a system peak of 6.5 GW.

The challenge is particularly acute because of the mismatch between data center construction timelines and electricity infrastructure development. A large data center can require between 200 MW and 500 MW of power capacity and be built within 18 to 24 months, while conventional grid expansions can take four to 10 years.

Load shifting involves moving certain computing workloads to different times or locations to reduce demand during periods of grid stress. However, the composition of data center workloads significantly limits this option.

Cloud services, enterprise workloads, and artificial intelligence (AI) inference require low latency and currently account for most data center capacity.

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