EirGrids preliminary data for June indicate the highest share of solar on Ireland's power system to date, up from 7.8% in May and 5.3% in June 2025.

Wind remained the dominant renewable source, contributing 30.7% of the overall fuel mix and generating 821 GWh across the month.

Gas-fired generation provided 40% of electricity, with a further 17% imported via interconnectors. Total system demand in June was 2,676 GWh, down from 2,794 GWh in May.

While balancing supply and demand in real time, the grid operator is also progressing long-term plans for Ireland’s electricity system. Its newly published five-year Corporate Strategy includes a key pillar, ‘Transforming for Clean Energy’, aimed at enabling far higher levels of renewable power, integrating clean technologies and delivering a more flexible grid.

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Under the plan, EirGrid is targeting the capability to operate the system with up to 95% renewable sources at any one time by 2030 and 100% by 2035, compared with a current limit of up to 75%.

Charlie McGee, EirGrid's System Operational Manager, said: "June was yet another record month for the amount of solar energy powering the electricity system in Ireland.

"While this might have been expected given the sunny weather that we saw during the month, it is also reflective of the progress that we have made in integrating large grid-scale solar farms onto the system. It follows a number of other solar related records so far this year, including reaching a peak of over 1 GW of electricity provided by grid-scale solar power."