Ireland’s electricity system notched multiple renewable energy milestones in the first six months of 2026, according to new figures from EirGrid.

In January, all-time weekend demand peaks were set on consecutive days. Demand reached 5,297 MW at 5.39pm on Saturday 3 January, followed by 5,480 MW at 5.31pm on Sunday 4 January. The previous Saturday record dated to January 2025, while the prior Sunday high was set in November 2025.

February delivered a new record for wind generation, which climbed to 3,898 MW at 5.50pm on Saturday 14 February. That surpassed the earlier highs of 3,884 MW in February 2025 and 3,866 MW in December 2023. The same day also brought a fresh Saturday peak in electricity demand, reaching 5,408 MW at 6.10pm.

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Across February, March and April, renewable generation supplied around half of Ireland’s electricity demand.

April marked a breakthrough for solar, as grid-scale solar output exceeded 1 GW for the first time. The peak of 1,021 MW was recorded at 12.19pm on Monday 20 April.

Further progress followed in May, when grid-scale solar reached a new high of 1,222 MW on Monday 25 May. In June, solar contributed a record 8.2% to the overall monthly fuel mix, up from 7.8% in May and 5.3% in June 2025.

Taken together, these milestones highlight steady advances towards a cleaner, greener electricity system for Ireland.