ESB Networks
Ireland's electricity distribution operator; its grid-connection queue is the constraint that Pure DC's Dublin microgrid was designed to bypass.
Last refreshed: 6 May 2026
Is the ESB Networks connection queue the main reason Irish data centres are building their own power?
Timeline for ESB Networks
Pure DC Dublin microgrid surfaces as Irish template
Data Centres: Boom and Backlash- What is ESB Networks and how does it affect data centres in Ireland?
- ESB Networks is Ireland's electricity distribution operator (a subsidiary of the state utility ESB). Its connection queue became a major constraint for Dublin data centres as DC load grew to 21% of national consumption; the Pure DC 110 MW microgrid was designed to bypass this queue entirely.Source: CRU / Pure DC
- Why are Irish data centres building their own power generation?
- Ireland's CRU introduced an on-site generation requirement in December 2025, and ESB Networks' connection queue has stretched to multi-year timelines as data centres reached 21% of national electricity consumption. On-site microgrids offer a faster operational PATH.Source: CRU
- Who owns ESB Networks in Ireland?
- ESB Networks is a subsidiary of ESB (Electricity Supply Board), a state-owned utility founded in 1927. ESB is owned by the Irish government and operates both generation and distribution infrastructure. ESB Networks runs the distribution grid to which most data centres connect.Source: ESB Networks
- How do new data centres in Ireland get power if the ESB Networks queue is full?
- Operators are increasingly building on-site microgrids. Pure DC's 110 MW Dublin microgrid with AVK bypassed the ESB Networks connection queue entirely using gas generation with biomethane/HVO fuel-switching. CRU's December 2025 policy explicitly anticipated and endorsed this approach.Source: Pure DC / CRU
Background
ESB Networks operates Ireland's electricity distribution network — the wires that deliver power from the high-voltage transmission system to end users, including data centres. The CRU (Ireland's Commission for Regulation of Utilities) connection queue managed via ESB Networks was a primary constraint on data-centre growth in Dublin until Pure DC launched its 110 MW Dublin microgrid in March-April 2026. Pure DC's microgrid was explicitly designed to bypass the ESB Networks queue entirely, becoming what the company described as Europe's first data-centre microgrid at that scale. The project emerged as the working template for CRU's December 2025 on-site generation requirement.
ESB Networks is a subsidiary of ESB (Electricity Supply Board), Ireland's state electricity company. It manages Ireland's distribution network (medium and low voltage) and is distinct from EirGrid, which manages the high-voltage transmission system. Data-centre operators seeking a new grid connection in Ireland must go through ESB Networks for distribution-level connections, which have faced multi-year queues as DC demand surged to approximately 21 per cent of national electricity consumption.
The CRU's December 2025 rule change — requiring new data centres to have on-site generation rather than relying solely on grid supply — effectively created the regulatory context in which Pure DC's microgrid model became commercially viable. ESB Networks' queues remain the constraint for operators that choose grid-connected rather than microgrid deployment, and the queue dynamics will be central to Ireland's data-centre capacity trajectory.