Wind farms provided 35% of the country's electricity last month, new figures from Wind Energy Ireland show - the second highest on record for a November month.
Solar energy and other renewables provided an additional 4% for a total renewable share of nearly 40% for the month.
Wind Energy Ireland said the average wholesale price of electricity in November was €122.75 per megawatt-hour (MWh), down 16% from €146.14 per MWh the same month last year.
Prices on days with the most wind power saw the average cost of a megawatt-hour of electricity fall to €82.55 and more than double to €181.60 on days when the country relied almost entirely on imported fossil fuels.
The latest figures show that wind power generation in November totalled around 1,311 gigawatt-hours (GWh), with Kerry once again ranking as the country's highest producing county for wind energy (128 GWh).
It was followed by Cork (125 GWh), Offaly (96 GWh) and Galway (91 GWh). Derry edged out Tipperary to secure the final spot in the top five, generating 90 GWh.
Justin Moran, Director of External Affairs at Wind Energy Ireland, said that every month we see just how important wind energy is for Ireland and these latest figures show again the key role it plays in powering the country.
"Counties like Kerry, Cork, Offaly, Galway and Derry are great examples of what we can achieve when we make the most of our natural resources," he said.
"Millions of euros are invested every year by existing wind farms in community benefit funds for local communities to invest in the priorities they choose for their area like sports grounds and play areas - and that figure is set to grow," he said.
"Every time a wind turbine generates power, it helps to lower wholesale electricity prices and, ultimately, consumers' bills. The more renewable energy we bring onto the system, the more we can displace the most expensive fossil fuels and drive prices down even further," he added.
Today's figures follow the publication of the EU Grid's Package which contains new measures to upgrade Europe's electricity grids and enable faster permitting, better planning and increased investment certainty.
"We welcomed the publication of the EU Grids Package which will have a positive impact on the development of Ireland’s electricity network," Mr Moran said.
He noted that so far this year alone 14% of wind power has been lost because the existing grid is simply not strong enough to carry all the renewable electricity that our wind farms produce.
"That means dirtier energy and higher bills for every Irish family and business," he stated.
"To deliver more affordable, clean electricity for homes and businesses across Ireland, we need to work together to grow Ireland’s grid capacity. It is vital to have the necessary energy infrastructure in place if we want to grow our renewable energy supply," he added.
