Ireland's CRU proposes interruptible gas tariff for new data centers to protect winter supply

Ireland's Commission for Regulation of Utilities (CRU) has proposed offering new data centers discounted gas network tariffs in exchange for accepting planned supply interruptions during periods of peak national demand^[1]. The proposal, first reported by the Irish Times on 7 September 2026, has not yet reached a final decision - the regulator says it is still reviewing stakeholder submissions^[1].

What the proposal says

Under the plan, large energy users would be offered interruptible gas contracts with lower network tariffs, meaning their supply could be reduced or cut off when the network is under pressure - for example during periods of very cold weather.

When an interruption is triggered, data centers would be expected to temporarily power down, postpone energy-intensive operations, or switch to an alternative fuel source - which the CRU says is likely to be diesel. The extent of the proposed discount has not been specified.

The CRU was explicit about why power generators are excluded from the same regime. The regulator said it would not propose interruptible connections for power generators, as this "would transfer an unacceptable level of security of supply risk from the gas system to the electricity system." Data centers, by contrast, were judged capable of building operational flexibility to absorb interruptions.

Gas Networks Ireland has statutory obligations under the Gas Act 1976 to provide third-party access to the gas network and cannot simply refuse eligible industrial customer connection applications on the basis of potential future capacity constraints. The CRU says the interruptible arrangement is therefore designed to introduce appropriate safeguards while remaining within the existing legislative framework.

The scale of the problem

The CRU's concern is rooted in a straightforward capacity arithmetic. CRU analysis found that 17 planned data centers seeking a gas connection would be the equivalent of six 500 MW combined cycle gas turbine power plants. Expressed another way, those 17 facilities would carry the same gas demand as 2.6 million homes.

That pipeline sits against a grid already under strain. Data center electricity demand stood at 22% of metered national consumption in 2024, with EirGrid projecting it could reach 31% - or 14.6 TWh - by 2034. Prospective new applications alone represent an additional 5.8 GW of capacity sought by data center operators, close to Ireland's all-time peak demand of 6.024 GW.

The CRU reopened large-load grid connections in early 2026, ending a multi-year de-facto freeze, on condition that new data centers reach 80% renewable supply within six years and carry 100% on-site backup. Yet EirGrid's All-Island Resource Adequacy Assessment, published in February 2026, warned that demand will exceed supply at peak across 2026 to 2028.

Political reaction

The proposal has landed in a charged political environment. Social Democrats TD Jennifer Whitmore accused the government of allowing unrestrained data center growth to put Ireland's energy security in serious jeopardy. Labour's climate spokesperson Ciarán Ahern reiterated calls for a moratorium on further data center expansion.

The amount of energy and water consumed by data centers, and how much strain they are placing on Ireland's infrastructure, has become the topic of heated political debate as the facilities continue to proliferate. Critics have framed the tariff discount as another concession to an industry that already pays less per unit of electricity than residential customers.

What to watch

The CRU is reviewing stakeholder submissions before issuing a final direction. The key open questions are the size of the discount - which the regulator has declined to specify - and how interruption events would be triggered and enforced in practice. For operators planning gas-backed on-site generation to meet the CRU's 100% backup requirement, an interruptible gas contract could create a direct conflict with the uptime guarantees their customers expect. That tension will likely dominate the next phase of consultation.