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Green Collective @greencollective.io · 9h

Renewable generation and pumped storage equalled 11% of yesterday's electricity demand, with a peak of 16% at 04:00. Fossil fuel generation (mostly gas) equalled 62% of demand. 0% of generation was exported, 27% of demand was met by imports.

A stacked area chart of the electricity generation mix on the island of Ireland. There are eight fuel types: 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 domestic solar. Source: EirGrid, SEMO

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Reposted by Green Collective

Green Collective @greencollective.io · 1d

With strong winds and high imports, the island of Ireland saw more renewable generation than fossil fuels in September. Rare, and great when it happens: we estimate CO₂ emissions for the month hit an all-time low.

(from our latest "Irish Grid Monthly" -- sign up for free now)

#SpeirGorm #EnergySky

A treemap of the electricity mix on the island of Ireland. There are eight fuel types: battery, pumped storage, biomass, hydro, solar, wind, gas, and waste-to-energy. Larger sources are annotated with the GWh and percentage of total generation that source comprised.

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

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Green Collective @greencollective.io · 1d

And the sign-up link:
currents.greencollective.io#/portal/signup

Currents by Green Collective

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

currents.greencollective.io

Green Collective @greencollective.io · 1d

With strong winds and high imports, the island of Ireland saw more renewable generation than fossil fuels in September. Rare, and great when it happens: we estimate CO₂ emissions for the month hit an all-time low.

(from our latest "Irish Grid Monthly" -- sign up for free now)

#SpeirGorm #EnergySky

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Green Collective @greencollective.io · 1d

Sunday's report, now SEMO's back to normal...

Renewable generation and pumped storage equalled 14% of yesterday's electricity demand, with a peak of 19% at 19:30. Fossil fuel generation (mostly gas) equalled 55% of demand. 0% of generation was exported, 31% of demand was met by imports.

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

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

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Green Collective @greencollective.io · 1d

Renewable generation and pumped storage equalled 16% of yesterday's electricity demand, with a peak of 21% at 10:45. Fossil fuel generation (mostly gas) equalled 62% of demand. 0% of generation was exported, 22% of demand was met by imports.

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Green Collective @greencollective.io · 2d

SEMO's pipeline seized up over the weekend so this is the best we can do for now. Not a good day for renewables with wind and solar accounting for just 9.1% of the day's demand! Interconnectors worked overtime to supply an impressive 31.9% of demand. Hopefully back to normal tomorrow!

A stacked area chart of the electricity generation mix on the island of Ireland. There are two fuel types: solar and wind. There is also a black line showing electricity demand and a red line indicating total generation.

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

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Green Collective @greencollective.io · 3d

Renewable generation and pumped storage equalled 9% of yesterday's electricity demand, with a peak of 11% at 13:15. Fossil fuel generation (mostly gas) equalled 61% of demand. 0% of generation was exported, 30% of demand was met by imports.

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Green Collective @greencollective.io · 4d

Renewable generation and pumped storage equalled 12% of yesterday's electricity demand, with a peak of 17% at 00:00. Fossil fuel generation (mostly gas) equalled 62% of demand. 0% of generation was exported, 26% of demand was met by imports.

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Reposted by Green Collective

Green Collective @greencollective.io · 5d

Even in a month full of notable highs and lows, one stood out: during September, the Irish grid emitted its least amount of CO₂ in a single month in modern times.

Our estimate is 577k tonnes. A lot but, as the chart below shows, just a few years ago we were seeing months with almost *1.4M tonnes*.`

A line chart of monthly CO₂ emissions from the Irish grid. The x-axis runs January-December and there is one line for each year. The y-axis shows tonnes of CO₂ each month.

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

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Green Collective @greencollective.io · 5d

Even in a month full of notable highs and lows, one stood out: during September, the Irish grid emitted its least amount of CO₂ in a single month in modern times.

Our estimate is 577k tonnes. A lot but, as the chart below shows, just a few years ago we were seeing months with almost *1.4M tonnes*.`

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Green Collective @greencollective.io · 5d

Renewable generation and pumped storage equalled 30% of yesterday's electricity demand, with a peak of 47% at 04:00. Fossil fuel generation (mostly gas) equalled 49% of demand. 0% of generation was exported, 21% of demand was met by imports.

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Green Collective @greencollective.io · 6d

Renewable generation and pumped storage equalled 35% of yesterday's electricity demand, with a peak of 52% at 14:45. Fossil fuel generation (mostly gas) equalled 43% of demand. 0% of generation was exported, 23% of demand was met by imports.

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Reposted by Green Collective

Green Collective @greencollective.io · 7d

The September issue of "Irish Grid Monthly" is now available on our website. RESS, dispatch down, a new solar farm, and *so* *many* *records*!

Our newsletter subscribers receive these reports on the 1st of each month -- sign-up for free now and join them! 📥

www.greencollective.io/post/monthly...

Irish Grid Monthly: September 2025

www.greencollective.io

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Green Collective @greencollective.io · 7d

Renewable generation and pumped storage equalled 35% of yesterday's electricity demand, with a peak of 88% at 03:00. Fossil fuel generation (mostly gas) equalled 50% of demand. 5% of generation was exported, 19% of demand was met by imports.

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Reposted by Green Collective

Trevor Johnston @beerwithsubtitles.net · 7d

Fencing, fighting, torture, revenge, giants, monsters, chases, escapes, true love, miracles—it's the Irish electric grid in September!

Green Collective @greencollective.io · 7d

The September issue of "Irish Grid Monthly" is now available on our website. RESS, dispatch down, a new solar farm, and *so* *many* *records*!

Our newsletter subscribers receive these reports on the 1st of each month -- sign-up for free now and join them! 📥

www.greencollective.io/post/monthly...

Irish Grid Monthly: September 2025

www.greencollective.io

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Green Collective @greencollective.io · 7d

The September issue of "Irish Grid Monthly" is now available on our website. RESS, dispatch down, a new solar farm, and *so* *many* *records*!

Our newsletter subscribers receive these reports on the 1st of each month -- sign-up for free now and join them! 📥

www.greencollective.io/post/monthly...

Irish Grid Monthly: September 2025

www.greencollective.io

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Green Collective @greencollective.io · 8d

Renewable generation and pumped storage equalled 62% of yesterday's electricity demand, with a peak of 83% at 00:00. Fossil fuel generation (mostly gas) equalled 32% of demand. 3% of generation was exported, 9% of demand was met by imports.

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Green Collective @greencollective.io · 9d

Renewable generation and pumped storage equalled 56% of yesterday's electricity demand, with a peak of 87% at 01:00. Fossil fuel generation (mostly gas) equalled 26% of demand. 2% of generation was exported, 20% of demand was met by imports.

A stacked area chart of the electricity generation mix on the island of Ireland. There are seven fuel types: 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 domestic solar. Source: EirGrid, SEMO

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Green Collective @greencollective.io · 10d

81GWh yesterday from wind was the most ever for an October day, equivalent to 77.1% of the day's electricity demand. Add biomass, solar, and hydro and it's 82.2%. Only seven days have ever seen a higher share. Grid carbon intensity averaged 105gCO₂/KWh: the fourth lowest ever.

#StormAmy #SpeirGorm

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Green Collective @greencollective.io · 10d

Renewable generation and pumped storage equalled 82% of yesterday's electricity demand, with a peak of 92% at 00:45. Fossil fuel generation (mostly gas) equalled 26% of demand. 8% of generation was exported, 0% of demand was met by imports.

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Green Collective @greencollective.io · 10d

It takes a lot for the demand line to drop noticeably. Darragh and Éowyn, yes (see our January newsletter), but unlikely for Amy. And, actually, more demand would leave more room for renewables. We're probably seeing a lot of curtailment today; will know more when data's published Monday afternoon.

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Green Collective @greencollective.io · 10d

It doesn't get much greener on the Irish grid: up to 6pm, renewable generation today has equalled 83.1% of electricity demand. Only a dozen or so prior days have done better. With lower weekend demand, there's a chance we'll see an all-time low for daily carbon emissions.

#StormAmy #SpeirGorm

A stacked area chart of the renewable electricity generation mix on the island of Ireland. There are seven fuel types: pumped storage, biomass, waste-to-energy, hydro, solar, wind, and gas. The y axis indicates the percentage of demand being met by each source.

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

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Green Collective @greencollective.io · 11d

As of 10am, wind has made up 70% of indigenous generation and renewable generation in total (biomass, hydro, wind, solar) has equalled 85.5% of the island's electricity demand. There's some exporting, gas generation's at a minimum. Looks set to last for the day.

#StormAmy #SpeirGorm

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Green Collective @greencollective.io · 11d

Renewable generation and pumped storage equalled 64% of yesterday's electricity demand, with a peak of 90% at 22:15. Fossil fuel generation (mostly gas) equalled 32% of demand. 3% of generation was exported, 7% of demand was met by imports.

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