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Green Collective @greencollective.io · 15h

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.

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, oil, 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 · 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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Green Collective @greencollective.io · 25/09/2026

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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Green Collective @greencollective.io · 25/09/2026

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Green Collective @greencollective.io · 25/09/2026

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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Green Collective @greencollective.io · 25/09/2026

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Green Collective @greencollective.io · 25/09/2026

Renewable generation and discharging storage equalled 53% of yesterday's electricity demand, with a peak of 68% at 14:15. Fossil fuel generation (mostly gas) equalled 39% of demand. 1% of generation was exported, 8% of demand was met by imports.

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Green Collective @greencollective.io · 24/09/2026

A sunny Monday, and EirGrid's dashboard showing a new all-island solar high: 1402MW ☀️ However, it's too close to call: as our charts show, spikes in real-time data are often later revised down and/or disappear with downsampling. Record or not, it's great to see such highs well into the autumn! ☀️

A line chart of Irish solar generation comparing three data sources:
- real-time EirGrid dashboard
- EirGrid's "historical quarter hourly source"
- best available source downsampled to 30 minutes

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

A line chart of Irish solar generation comparing three data sources:
- real-time EirGrid dashboard
- best available source downsampled to 30 minutes

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

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Trevor Johnston @beerwithsubtitles.net · 24/09/2026

Riveting reading, obviously -- but might be of interest to close followers of @greencollective.io closely who are curious what sort of datasets we have to juggle 🤓 (fun fact: there are at *least* half a dozen sources of Irish solar data, at varying resolutions/timeliness/completeness)

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Green Collective @greencollective.io · 24/09/2026

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Green Collective @greencollective.io · 24/09/2026

Renewable generation and discharging storage equalled 22% of yesterday's electricity demand, with a peak of 40% at 23:45. Fossil fuel generation (mostly gas) equalled 55% of demand. 0% of generation was exported, 23% of demand was met by imports.

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Green Collective @greencollective.io · 23/09/2026

Renewable generation and discharging storage equalled 20% of yesterday's electricity demand, with a peak of 31% at 01:45. Fossil fuel generation (mostly gas) equalled 62% of demand. 0% of generation was exported, 18% of demand was met by imports.

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Green Collective @greencollective.io · 22/09/2026

Renewable generation and discharging storage equalled 32% of yesterday's electricity demand, with a peak of 49% at 13:45. Fossil fuel generation (mostly gas) equalled 44% of demand. 0% of generation was exported, 24% of demand was met by imports.

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Green Collective @greencollective.io · 21/09/2026

Renewable generation and discharging storage equalled 28% of yesterday's electricity demand, with a peak of 41% at 12:15. Fossil fuel generation (mostly gas) equalled 39% of demand. 0% of generation was exported, 33% of demand was met by imports.

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Green Collective @greencollective.io · 20/09/2026

Renewable generation and discharging storage equalled 54% of yesterday's electricity demand, with a peak of 68% at 11:45. Fossil fuel generation (mostly gas) equalled 27% of demand. 0% of generation was exported, 19% of demand was met by imports.

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Green Collective @greencollective.io · 19/09/2026

Renewable generation and discharging storage equalled 59% of yesterday's electricity demand, with a peak of 75% at 18:15. Fossil fuel generation (mostly gas) equalled 28% of demand. 0% of generation was exported, 14% of demand was met by imports.

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Green Collective @greencollective.io · 18/09/2026

Renewable generation and discharging storage equalled 56% of yesterday's electricity demand, with a peak of 72% at 15:45. Fossil fuel generation (mostly gas) equalled 27% of demand. 0% of generation was exported, 17% of demand was met by imports.

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Green Collective @greencollective.io · 17/09/2026

Renewable generation and discharging storage equalled 49% of yesterday's electricity demand, with a peak of 71% at 22:45. Fossil fuel generation (mostly gas) equalled 37% of demand. 0% of generation was exported, 14% of demand was met by imports.

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Green Collective @greencollective.io · 16/09/2026

Renewable generation and discharging storage equalled 51% of yesterday's electricity demand, with a peak of 62% at 17:15. Fossil fuel generation (mostly gas) equalled 33% of demand. 0% of generation was exported, 16% of demand was met by imports.

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Green Collective @greencollective.io · 15/09/2026

Renewable generation and discharging storage equalled 42% of yesterday's electricity demand, with a peak of 61% at 13:45. Fossil fuel generation (mostly gas) equalled 47% of demand. 0% of generation was exported, 12% of demand was met by imports.

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Green Collective @greencollective.io · 14/09/2026

Renewable generation and discharging storage equalled 14% of yesterday's electricity demand, with a peak of 31% at 16:15. Fossil fuel generation (mostly gas) equalled 57% of demand. 0% of generation was exported, 29% of demand was met by imports.

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Green Collective @greencollective.io · 13/09/2026

Renewable generation and discharging storage equalled 47% of yesterday's electricity demand, with a peak of 78% at 01:45. Fossil fuel generation (mostly gas) equalled 35% of demand. 2% of generation was exported, 20% of demand was met by imports.

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Green Collective @greencollective.io · 12/09/2026

Renewable generation and discharging storage equalled 34% of yesterday's electricity demand, with a peak of 76% at 23:45. Fossil fuel generation (mostly gas) equalled 42% of demand. 0% of generation was exported, 24% of demand was met by imports.

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Green Collective @greencollective.io · 11/09/2026

Renewable generation and discharging storage equalled 52% of yesterday's electricity demand, with a peak of 72% at 05:15. Fossil fuel generation (mostly gas) equalled 33% of demand. 1% of generation was exported, 16% of demand was met by imports.

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Reposted by Green Collective

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

One week into the new month, it's a total flip for wind generation in Ireland: following one of the calmest ever August months, September is averaging well above normal with wind the largest source of power -- equal to 39% of the island's electricity demand 🍃 📊 A long way to go but a great start!

A chart of monthly wind generation in August months. A bar chart showing generation is overlaid on top of a line chart indicating wind generation over demand.
Footnote reads: All-island figures. Source: EirGrid

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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Green Collective @greencollective.io · 10/09/2026

Renewable generation and discharging storage equalled 25% of yesterday's electricity demand, with a peak of 41% at 23:45. Fossil fuel generation (mostly gas) equalled 49% of demand. 0% of generation was exported, 26% of demand was met by imports.

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

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

Renewable generation and discharging storage equalled 52% of yesterday's electricity demand, with a peak of 66% at 16:45. Fossil fuel generation (mostly gas) equalled 35% of demand. 0% of generation was exported, 13% of demand was met by imports.

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Green Collective @greencollective.io · 08/09/2026

Renewable generation and discharging storage equalled 49% of yesterday's electricity demand, with a peak of 60% at 13:45. Fossil fuel generation (mostly gas) equalled 35% of demand. 0% of generation was exported, 17% of demand was met by imports.

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Green Collective @greencollective.io · 07/09/2026

Renewable generation and discharging storage equalled 59% of yesterday's electricity demand, with a peak of 78% at 07:45. Fossil fuel generation (mostly gas) equalled 31% of demand. 2% of generation was exported, 12% of demand was met by imports.

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Green Collective @greencollective.io · 06/09/2026

Renewable generation and discharging storage equalled 33% of yesterday's electricity demand, with a peak of 65% at 23:45. Fossil fuel generation (mostly gas) equalled 39% of demand. 0% of generation was exported, 29% of demand was met by imports.

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Green Collective @greencollective.io · 05/09/2026

In the first half of August, production from Irish solar farms already overtook last year's total ☀️ 📊 As the charts below show, that's a little later than in the last few years -- but our projection for the rest of the year still predicts Irish solar's impressive year-on-year growth will continue.

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Green Collective @greencollective.io · 05/09/2026

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Green Collective @greencollective.io · 04/09/2026

How Ireland met electricity demand during August: 🔹 26.7% renewables: 18.2% wind 💨, 6.8% solar ☀️, 1.7% biomass 🪵, 0.1% hydro 💧 🔹 49.2% fossil fuels: 47.6% gas 🔥, 1.5% waste-to-energy 🔥, 0.1% oil 🛢️ 🔹 1.3% storage: 0.8% pumped hydro ⛰️, 0.5% batteries 🪫 🔌 22.5% imports (from our latest newsletter)

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

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Green Collective @greencollective.io · 05/09/2026

Renewable generation and discharging storage equalled 58% of yesterday's electricity demand, with a peak of 73% at 16:45. Fossil fuel generation (mostly gas) equalled 30% of demand. 1% of generation was exported, 13% of demand was met by imports.

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Green Collective @greencollective.io · 04/09/2026

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Green Collective @greencollective.io · 04/09/2026

Renewable generation and discharging storage equalled 42% of yesterday's electricity demand, with a peak of 59% at 01:15. Fossil fuel generation (mostly gas) equalled 35% of demand. 0% of generation was exported, 24% of demand was met by imports.

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Green Collective @greencollective.io · 03/09/2026

Renewable generation and discharging storage equalled 40% of yesterday's electricity demand, with a peak of 56% at 23:45. Fossil fuel generation (mostly gas) equalled 44% of demand. 0% of generation was exported, 16% of demand was met by imports.

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Green Collective @greencollective.io · 02/09/2026

Renewable generation and discharging storage equalled 35% of yesterday's electricity demand, with a peak of 48% at 11:15. Fossil fuel generation (mostly gas) equalled 43% of demand. 0% of generation was exported, 22% of demand was met by imports.

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Green Collective @greencollective.io · 01/09/2026

🚨 Renewable sources met 1/4 of Ireland's electricity demand during August. The lowest share this summer, and down from 1/3 this time year last year -- what changed? 📊 This and much more in the latest "Irish Grid Monthly", arriving in subscribers' inboxes later today. Sign up now and get your copy!

A chart of monthly renewable generation in August months from 2019 through 2026. A bar chart indicating GWh is overlaid on a line chart indicating renewable generation vs demand. The bar for June 2025 is a paler colour to indicate that data is incomplete because the month is not yet over.

All-island figures. Renewables comprise wind, hydro, solar, and biomass. Excludes domestic solar.
Source: EirGrid, SEMO

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

Footnote reads: All-island figures. Renewables comprise wind, hydro, solar, and biomass. Excludes wind and solar farms not registered with SEMO. Excludes rooftop solar. Source: SEMO

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Green Collective @greencollective.io · 01/09/2026

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Green Collective @greencollective.io · 01/09/2026

Renewable generation and discharging storage equalled 41% of yesterday's electricity demand, with a peak of 62% at 03:45. Fossil fuel generation (mostly gas) equalled 40% of demand. 1% of generation was exported, 20% of demand was met by imports.

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Green Collective @greencollective.io · 31/08/2026

Renewable generation and discharging storage equalled 22% of yesterday's electricity demand, with a peak of 41% at 23:45. Fossil fuel generation (mostly gas) equalled 49% of demand. 0% of generation was exported, 29% of demand was met by imports.

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Green Collective @greencollective.io · 30/08/2026

Renewable generation and discharging storage equalled 15% of yesterday's electricity demand, with a peak of 24% at 14:45. Fossil fuel generation (mostly gas) equalled 55% of demand. 0% of generation was exported, 31% of demand was met by imports.

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Green Collective @greencollective.io · 29/08/2026

Renewable generation and discharging storage equalled 14% of yesterday's electricity demand, with a peak of 38% at 15:45. Fossil fuel generation (mostly gas) equalled 58% of demand. 0% of generation was exported, 28% of demand was met by imports.

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Green Collective @greencollective.io · 28/08/2026

Ups and downs! Monday saw a new all-time high for Irish solar while yesterday was one of the worst days for solar this year, controlling for the seasons 🌦️ But: the solar fleet has grown so rapidly that yesterday's solar generation would have been a standout day just a couple of summers ago ☀️ 📈 🔎

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