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Irish solar farm growth, 2019 through September 2026. All growth in recent years is in the ROI. The fleet expanded a lot this year, and has headed west: the island's second largest solar farm is now in County Galway. The newest? Monvallet in County Louth which powered up during September. 📊 ☀️ ☘️

A map of Irish solar farms showing capacity growth by year.

Footnote reads: Excludes small solar farms not registered with SEMO. Marker size indicates typical peak output, colour the year of first significant generation. Faded markers indicate retired or currently offline plants. Source: SEMO

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If you like these kinds of updates on Irish electricity then sign up for our newsletter to receive your copy of "Irish Grid Monthly" on the 1st of each and every month. Sign up here: currents.greencollective.io#/portal/signup

A newsletter from Green Collective with monthly and ad-hoc reporting on renewables and the Irish electricity grid.

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Clashwilliam? As of last Thursday, it hasn't yet exported anything to the grid.

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Green Collective @greencollective.io · 23h

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Renewable generation and discharging storage equalled 56% of yesterday's electricity demand, with a peak of 77% at 11:45. Fossil fuel generation (mostly gas) equalled 35% of demand. 1% of generation was exported, 10% of demand was met by imports.

A stacked area chart of the electricity generation mix on the island of Ireland with the following fuel types: battery, pumped storage, biomass, waste-to-energy, hydro, solar, wind, and gas. There is also a black line showing electricity demand.

Footnote reads: All-island figures. Excludes rooftop solar. Source: EirGrid, SEMO

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Green Collective @greencollective.io · 02/10/2026

A newsletter from Green Collective with monthly and ad-hoc reporting on renewables and the Irish electricity grid.

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Reposted by Green Collective

Trevor Johnston @beerwithsubtitles.net · 02/10/2026

The first of each month is a busy day at the @greencollective.io home office! Highlights of our September issue: - county-level dispatch down analysis for wind - battery record deep-dive by @feiwang.bsky.social - annual solar growth map Read it online: currents.greencollective.io/irish-grid-m...

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Reposted by Green Collective

brian276.bsky.social @brian276.bsky.social · 01/10/2026

Some interesting developments in Ireland -that’s a lot of batteries/storage #IrishEnergyTransition #IrelandsEnergyTransition

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Green Collective @greencollective.io · 02/10/2026

Last month was the windiest September yet, with wind farms producing 1256GWh: equivalent to 36.8% of the island's electricity demand ☘️ 🍃 Significantly up from the same period last year, the upward trend for September wind continues 📈

A county-level heatmap of Irish wind generation. Counties are divided into three tiers, according to how much wind energy each produced.

Renewables comprise wind, hydro, solar, and biomass. Excludes wind and solar farms not registered with SEMO. Excludes rooftop solar.
Source: SEMO

A chart of wind generation in September months from 2019 through 2026. A bar chart indicating GWh is overlaid on a line chart indicating wind generation vs demand.

All-island figures. Source: EirGrid, SEMO

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Green Collective @greencollective.io · 02/10/2026

Renewable generation and discharging storage equalled 58% of yesterday's electricity demand, with a peak of 76% at 14:45. Fossil fuel generation (mostly gas) equalled 34% of demand. 1% of generation was exported, 9% of demand was met by imports.

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Reposted by Green Collective

The Irish grid in September: 🔹 43.0% renewables: 36.8% wind 💨, 4.8% solar ☀️, 1.1% biomass 🪵, 0.3% hydro 💧 🔹 39.1% fossil fuels: 37.5% gas 🏭️, 1.6% waste-to-energy 🔥 🔹 1.3% storage: 0.8% pumped hydro ⛰️, 0.5% batteries 🔋 🔌 16.5% imports All this and much more in the latest "Irish Grid Monthly"!

A map of Ireland with markers representing electricity generation and sized in proportion to amount of electricity produced.

Footnote reads: Excludes small wind and solar farms not registered with SEMO. Excludes rooftop solar. Marker positions are approximate in order to avoid overlaps. Source: SEMO

A treemap of the electricity mix on the island of Ireland. Larger sources are annotated with the GWh produced.

Footnote reads: All-island figures. Excludes rooftop solar. Source: EirGrid, SEMO

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Sign-up link (also in our bio): currents.greencollective.io#/portal/signup No spam, just a monthly report which lands in your inbox on the 1st of each and every month! 📊 ⚡ 📬

A newsletter from Green Collective with monthly and ad-hoc reporting on renewables and the Irish electricity grid.

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Green Collective @greencollective.io · 30/09/2026

Renewable generation and discharging storage equalled 63% of yesterday's electricity demand, with a peak of 83% at 13:15. Fossil fuel generation (mostly gas) equalled 32% of demand. 2% of generation was exported, 6% of demand was met by imports.

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Renewable generation and discharging storage equalled 72% of yesterday's electricity demand, with a peak of 81% at 04:45. Fossil fuel generation (mostly gas) equalled 31% of demand. 3% of generation was exported, 0% of demand was met by imports.

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Green Collective @greencollective.io · 29/09/2026

Renewable generation and discharging storage equalled 43% of yesterday's electricity demand, with a peak of 69% at 23:15. Fossil fuel generation (mostly gas) equalled 46% of demand. 1% of generation was exported, 12% of demand was met by imports.

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Green Collective @greencollective.io · 28/09/2026

Renewable generation and discharging storage equalled 47% of yesterday's electricity demand, with a peak of 70% at 01:45. Fossil fuel generation (mostly gas) equalled 34% of demand. 0% of generation was exported, 19% of demand was met by imports.

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Green Collective @greencollective.io · 27/09/2026

Renewable generation and discharging storage equalled 62% of yesterday's electricity demand, with a peak of 76% at 16:15. Fossil fuel generation (mostly gas) equalled 30% of demand. 1% of generation was exported, 9% of demand was met by imports.

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Green Collective @greencollective.io · 26/09/2026

Renewable generation and discharging storage equalled 42% of yesterday's electricity demand, with a peak of 69% at 23:45. Fossil fuel generation (mostly gas) equalled 48% of demand. 1% of generation was exported, 11% of demand was met by imports.

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Reposted by Green Collective

In 2025, renewables and storage exceeded fossil fuels on the Irish grid in a September month for the first time. It's been a strong month for renewables but will we see a repeat in 2026? 🍃 🏭️ The answer and much more in the next edition of "Irish Grid Monthly", arriving October 1. Subscribe today!

A bar chart of electricity generation on the island of Ireland for June months between 2019 and 2026, inclusive. Each year has two bars: a green one for renewable generation and discharging storage, and a grey one for fossil fuels.

Footnote reads: All-island figures. Renewables comprise wind, hydro, solar, and biomass. Storage comprises batteries and pumped hydro. Fossil fuels comprise coal, gas, oil, and waste-to-energy. Source: EirGrid, SEMO

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Extremely strong solar generation across the island earlier this week: - solar met 7% of Monday's electricity demand, 7.9% Wednesday - at peak sun, solar was supplying >25% of electricity demand - pronounced dips in demand at peak sun thanks to rooftop solar Pretty good as October closes in! ☀️ 🍂

A map of Ireland with markers representing generation at solar farms. Markers are sized in proportion to the total available power at each farm.

Footnote reads: All-island figures. Excludes small solar farms not registered with SEMO. Excludes rooftop solar.
Source: SEMO

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If you like these kinds of updates on Irish electricity then sign up for our newsletter to receive your copy of "Irish Grid Monthly" on the 1st of each and every month. Next issue arriving on Thursday! Sign up here: currents.greencollective.io#/portal/signup

A newsletter from Green Collective with monthly and ad-hoc reporting on renewables and the Irish electricity grid.

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Generation was extremely strong Wednesday, too: bsky.app/profile/gree...

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And a little more on the possible all-time high of just over 1.4GW we saw Monday afternoon, in case you missed it: bsky.app/profile/gree...

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