Renewable energy from wind and solar reduced the gas and carbon costs of generating electricity on the island of Ireland last year by more than €1.5 billion, according to a new report.
Almost 93%, or €1.4 billion of these savings, was accounted for by wind.
The production of electricity on solar farms made up the remaining €115 million saved on gas and carbon credit costs in 2025.
The figures come from a new report called Cutting Carbon, Cutting Bills.
It was commissioned by Wind Energy Ireland and produced by Barringa, an international consultancy group.
A total of €1.1 billion, or 72%, of the savings accrued in the Republic of Ireland.
Northern Ireland accounted for the remaining €426 million, or 28% of the savings.
The report says the availability of such large amounts of renewable electricity shielded consumers across Ireland and Northern Ireland from very volatile international gas prices in 2025.
The greatest savings were in the winter months, when electricity demand and gas prices were highest.
February was the most valuable month for wind, with renewables cutting gas and carbon spending by €225 million in that single month.
Another important benefit was that greenhouse gas emissions were significantly reduced by not having to burn gas to generate electricity.
Over 5 million tonnes of carbon dioxide emissions were saved or avoided across Ireland and Northern Ireland in 2025.
The report says this is equivalent to the annual energy-related emissions from about 1.2 million homes.
These latest savings bring the cumulative amount saved on gas and carbon credit over the past four years to €6.7 billion.
Wind Energy Ireland described this as a "staggering" amount.
Without the development of wind and solar farms this amount would have gone to the global fossil fuel industry, the report says.
Instead, it was kept at home supporting economic activity on the island of Ireland while helping to make the energy system on the Island cleaner and more efficient.
Wholesale prices in Ireland are still more than twice as high as they were in 2019.
Chief Executive of Wind Energy Ireland Noel Cunniffe said: "We cannot be energy secure if we rely on gas markets dominated by the likes of Vladimir Putin. Together, wind and solar are helping to build a true Irish electrostate where we can power ourselves with our own clean, affordable and secure energy."
Chief Executive of Solar Ireland Ronan Power said: "Solar power is unique because it is delivered at utility scale as well as on rooftops across homes, businesses, schools, farms, public and community buildings."
He added: "That accessibility allows communities to generate their own clean electricity while reducing reliance on imported gas."
Meanwhile, wind energy figures for last month, showed wind farms produced 1,400 gigawatts, or 34% of Ireland's electricity in January.
This is one of the strongest January wind performances on record.
The availability of renewable energy keeps the price of electricity significantly lower than what it might otherwise be for everyone.
For instance, the average wholesale cost of electricity last year was €126.95 per megawatt hour.
But on the days when wind energy generation was highest, the average price of electricity was significantly lower at €101.84.
This rose to an average of €145.84 when wind energy was lowest.
For the first time ever, Offaly was the number one county for wind generation in January this year, with 179 gigawatts of electricity produced.
Counties Kerry, Cork, Tyrone and Tipperary were the next four highest.
