The transition to renewable electricity is, above all, an infrastructure problem. The Commission for Regulation of Utilities confirmed this in December 2025 when it published Price Review 6, approving up to €18.9 billion in Ireland’s electricity grid from 2026 to 2030. Covering ESB Networks and EirGrid, it is the largest single infrastructure commitment in Irish electricity history. For green sector executives, it marks the moment capital commitment overtook strategic intent.

Price Review 6 is the right intervention at the right scale, arriving with genuine delivery momentum. In March 2026, Ireland crossed 8 gigawatts of installed renewable electricity capacity, with wind supplying 41 per cent of national generation in February. The grid upgrade is the foundation every further gigawatt depends on: offshore wind, battery storage and industrial decarbonisation all require the same expanded network. The three pillars of the PR6 case are grid capacity, offshore readiness and affordability.

The scale of the buildout is substantial. The framework funds over 500 capital projects, including 29 priority transmission projects, 319 kilometres of new underground cable and 181 kilometres of new overhead lines. A baseline of €13.8 billion has been committed, rising to €18.9 billion under a performance-linked mechanism that rewards delivery pace. The programme is backed by a €3.5 billion government equity injection, the largest state investment in electricity infrastructure since rural electrification.

The offshore wind dimension is commercially critical. Ireland has just 25 megawatts of installed offshore capacity against a 5 gigawatt target by 2030 and a 37 gigawatt ambition by 2050. The ORESS auction programme has contracted nearly 4 gigawatts, including the 900 megawatt Tonn Nua project awarded to ESB and Ørsted in December 2025 at €98.72 per megawatt hour. PR6 establishes EirGrid’s Offshore Asset Owner function to receive 5 gigawatts of offshore capacity in the early 2030s.

The investment also addresses the curtailment problem that has constrained renewable economics. In 2025, approximately 13 per cent of Ireland’s cheapest wind-generated electricity was dispatched down because the network could not absorb it. Expanding transmission capacity and upgrading substations, PR6 targets a reduction in curtailment, improving the revenue certainty that underpins financing for new renewable generation.

Three actions would strengthen delivery. Planning reform for grid infrastructure should be treated with the same urgency as generation permitting, since transmission bottlenecks and judicial reviews on grid projects are now as consequential as delays on wind farms. The Offshore Wind Delivery Taskforce should publish annual milestones for port readiness and grid connection timelines, enabling supply chain confidence. A national skills programme for high-voltage and offshore electrical roles is required, as domestic capacity cannot meet near-term demand.

Ireland’s €18.9 billion grid commitment marks the shift from policy ambition to capital deployment. Globally, the energy transition is teaching the same lesson: generation capacity means nothing without the infrastructure to carry it. Ireland’s Atlantic wind resource, growing interconnector network and funded grid programme make this a long-term national economic asset. The pace of delivery over the next four years will determine how much offshore potential is realised this decade.

(The views expressed by the writer are his/her own and do not necessarily reflect the views or positions of BusinessRiver.)