ESB Networks says it connected 23 large-scale renewable energy projects to the country's electricity network this year.
This added 688MW of green energy capacity to the network, enough to power around 350,000 homes.
This, it said, is above all previous renewable energy connection records.
The connection of a 95MW solar farm in Gillinstown, Co Meath, brought the amount of new renewable energy generation connected to the network to 5,400MW this year.
Meanwhile 79MW of battery storage was connected in 2022, bringing the country's total energy storage capacity to 800MW.
"The connection of almost 700MW of clean energy this year is a significant collective achievement for ESB Networks, the renewables community and for Ireland," said ESB Networks managing director Nicholas Tarrant. "It represents a 15% increase in renewable generation year-on-year and it is testament to ESB Networks' continued investment and innovation in the development of a safe, resilient and flexible electricity network."
ESB Networks said it was also on track to connect around 34,000 new homes across the country by the end of the year.
It said these homes are increasingly all-electric, increasing the capacity for the broader use of clean energy.