Pure DC's 110 MW Dublin microgrid , built with engineering partner AVK and described by the developer as Europe's first deployment at that scale, has emerged this week as the working compliance template for CRU's December 2025 on-site-generation requirement. CRU, Ireland's Commission for Regulation of Utilities, set a rule requiring new data centres to source 80 per cent of annual demand from additional Irish-sited renewables within six years of energisation. The Pure DC microgrid uses gas generation with biomethane and hydrotreated vegetable oil switching capability, the configuration the rule's drafters had in mind when they approved it.
The surfacing matters because Ireland's policy environment had been the murkiest in Europe for new data-centre projects since Dublin's grid moratorium effectively sealed the market in 2022. CRU's December 2025 framework reopened the door, conditional on on-site generation, but operators had no example of a compliant build until Pure DC's. The same CRU directive instructed EirGrid and ESB Networks to publish a data-centre engagement and connection process by 31 March 2026; that deadline passed without a public publication, and the gap remains an open compliance question for the next round of Dublin applicants.
The Pure DC template will be read carefully across two other jurisdictions. American state utilities exploring on-site-generation requirements as an alternative to outright moratoriums now have an EU example of how the rule plays in practice, which is relevant for any FERC ruling on RM26-4-000 that addresses behind-the-meter cost allocation. Spanish and Iberian operators are watching for the biomethane and HVO switching mechanism, because the same fuel-flex configuration suits a renewable-heavy grid where dispatchable backup is the contested layer. The Dublin microgrid is one project; the regulatory pathway it has cleared is the asset.
