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GridteamAI · Quarterly Sector Report · Ireland series · IE002
Ireland Data Centres — bring your own power: the connection reset, the gas squeeze, the carbon budget, the economics and the planning fights
Ireland series · Data Centres · IE002
A4 · 210 × 297 mm · 3 mm bleed (not shown)
UK / IE English · ~30 pp · Verified 2026-07-06
FRONT MATTERi · Cover · sector accent · full bleed
GridteamAI
Quarterly Sector Report
IE002
Data Centres
by GridteamAI
IE · Data centres · Connection reset · Bring-your-own-power Republic of Ireland · 2026

Ireland Data
Centres.

Bring your own power — Ireland reopens the door and hands the bill to on-site gas.

gridteamai.com · book@gridteamai.com Ireland series · IE002 Consultancy-grade deliverable
05 — 06Executive summary · spread
Ireland Data Centres · Executive summary05
00 · Executive Summary Six observations

The four-year freeze is over — on "bring your own power" terms.

In December 2025 the CRU ended the Dublin connection freeze and demanded self-generation to full import capacity plus 80% new-renewable supply. It is the single most important development for anyone planning a large connection in Ireland — and its near-term mechanics point, awkwardly, at gas.

One. The four-year freeze is over, on "bring your own power" terms.

The CRU's December 2025 rules end the Dublin connection freeze and demand self-generation to full import capacity plus 80% new-renewable supply.

Two. Data centres are 22% of the grid, heading for 31%.

The highest data-centre share of electricity of any country, and still rising — the demand-side pressure behind every grid decision in Ireland.

Three. The near-term "clean" connection runs through gas.

With renewables years away, the plant that satisfies self-generation now is dispatchable gas or diesel — and the gas network has stopped signing new data-centre contracts.

GridteamAI · Quarterly Sector Report · IE002Republic of Ireland · 2026
06Executive summary · continued
Four. Data centres are bending the carbon budget.

They absorbed effectively all of Ireland's new wind between 2017 and 2023, and account for a large share of the electricity sector's projected carbon-budget overshoot.

Five. The economic case is real, the biggest number contested.

Direct contribution of €2.2 billion and 19,500 jobs is solid; the "€104 billion enabled" figure is an economy-wide attribution that has been publicly criticised.

Six. Planning is now the real constraint.

Grange Castle refused, Ennis fought to the High Court, Fingal refusals overturned — approval is decided site by site, in the planning system and the courts, and water is the next binding limit.

The shape of this volume. § 1 sets out the figures, each traced to a named Irish source. § 2 develops twelve findings, each confidence-annotated. A chapter-weight pull at p. 18 anchors the argument. § 3 places Ireland against its peers and states the argument. § 4 maps the pipeline. § 5 makes nine recommendations, with a one-page Director's Six-Check tear-out at p. 29.

Executive summary · endsPart 1 · The evidence · p. 07
10 · FIG. 1§ 1 · Data-centre share of electricity
§ 1 · The figures, verified10
Figure 1 · Data-centre share of Ireland's electricityCSO · EirGrid

From 5% to 22% in nine years — and a median forecast of 31% by 2034.

Data centres took 6,969 GWh of Ireland's metered electricity in 2024 — 22% of the total, and about half of all demand in the Dublin region. EirGrid's median forecast (dashed) puts the national share at 31% by 2034.

DATA-CENTRE SHARE OF METERED ELECTRICITY · %010%20%30%40%5%22%6,969 GWH≈50% OF DUBLIN DEMAND31%20152024CSO · METERED2034EIRGRID MEDIAN FORECAST22% of metered electricity in 2024 — about half of all demand in the Dublin region.CSO metered consumption, June 2025 · EirGrid median forecast for 2034.
Fig. 1 / §1

The 2024 bar (accent) is more than four times the 2015 level; the 2034 forecast (dashed) is a projection, not a measurement. No comparable economy carries a data-centre load this large relative to its grid.

Quarterly Sector Report · IE002§ 2 · Twelve findings · p. 11
11 — 12§ 2 · Twelve findings · lead + 01–02
§ 2 · Twelve findings11
§ 2 · Twelve findingsEach carries a confidence level

Twelve findings. Each carries a confidence level.

HIGH — verified against a named Irish regulator, agency or primary source. MEDIUM — named source cross-referenced, or an attribution/estimate that cannot be independently measured. Forward positions are labelled as projections.

Findings 01 – 12 · summary

  1. 01The four-year freeze is over — on "bring your own power" terms. [HIGH]
  2. 0222% of the grid — the highest data-centre share of any country. [HIGH]
  3. 03"Clean connection" runs, for now, through on-site gas. [HIGH]
  4. 04The gas network has stopped signing new data-centre contracts. [HIGH]
  5. 05Data centres absorbed every unit of new Irish wind for six years. [HIGH]
  6. 06Data centres are bending the carbon budget. [MEDIUM]
  7. 07The economic case is real — but the biggest number is contested. [MEDIUM]
  8. 08Planning has become the sector's real battleground. [HIGH]
  9. 09Dublin is full, so the growth is heading for the regions. [MEDIUM]
  10. 10The hyperscalers are locked in. [MEDIUM]
  11. 11Water is the next constraint. [MEDIUM]
  12. 12The contradiction Ireland hasn't resolved. [HIGH]
Quarterly Sector Report · IE002§ 2 · Findings 01–02 · facing
12§ 2 · Findings 01 – 02
§ 2 · Findings 01 — 02The reset · the scale
Finding 01 · HIGH

The four-year freeze is over — on "bring your own power" terms.

The CRU's Large Energy User connection decision of 12 December 2025 (CRU2025236) ended the Dublin connection freeze that had run since a 2021 EirGrid intervention and the CRU's November 2021 direction. The terms are strict: a site above 10 MVA must provide new dispatchable generation or storage matched to 100% of its de-rated maximum import capacity, participate in the electricity market, and source at least 80% of annual demand from new Irish renewables on a six-year glide path. The design intent is coherent — a data centre that brings its own firm power and underwrites new renewables helps the system rather than draining it. The problem is sequencing: the renewables and network reinforcement to meet the 80% condition cleanly are years out, so in the near term the plant that satisfies the rule is gas. Connection is possible again, but only for those who can finance and build their own generation — rewarding the well-capitalised and the vertically integrated.

Sources · CRU2025236, 12 Dec 2025 · CRU direction CRU/21/124, Nov 2021
Finding 02 · HIGH

22% of the grid — the highest data-centre share of any country.

The CSO reported on 10 June 2025 that data centres used 22% of Ireland's metered electricity in 2024 — 6,969 GWh of 31,903 GWh — up from 5% in 2015. In the Dublin region they are about half of all demand. EirGrid's median forecast puts the national share at 31% by 2034. No comparable economy carries a data-centre load this large relative to its grid; Ireland is, on this measure, the most data-centre-intensive electricity system in the world. That single fact is the root of nearly every tension in this report and the grid report that accompanies it (IE001). It is why the connection rules are so strict, why the gas network is under pressure, why the emissions maths is difficult, and why the politics is fraught — and why a blunt cap has never been the answer: the same load that strains the grid is among the deepest foreign investment in the State.

Sources · CSO, 10 Jun 2025 · EirGrid demand forecasts
§ 2 · 01 – 02Findings 03 – 04 · overleaf