New figures show that electricity from renewable sources provided almost half of total demand in December.
Provisional data from grid operator EirGrid shows that the majority of renewable electricity generated last month came from windfarms, which accounted for over 40% of all electricity used in Ireland.
Total generation from wind energy amounted to 1,287 GWh (Gigawatt hours) over the month.
Overall, renewables provided 46.7% of electricity in December when other sources including grid-scale solar and hydropower are included.
Overall electricity system demand stood at 3,110 GWh for December.
Eirgrid said that gas generation accounted for 38% of all electricity in December, with 12% being imported via interconnection, 2% coming from coal, and the remaining 1% from other sources.
EirGrid is responsible for leading the country's transition to a low carbon future so that 80% of electricity can come from renewables, as set out in Government targets.
Currently the electricity grid can accommodate up to 75% of electricity from renewable sources at any one time and EirGrid aims to further increase that.
