Ireland's solar capacity poised to exceed 3.3 GW by year-end

⚡ AI Executive Summary

Ireland's solar sector has grown substantially, reaching nearly 2.7 GW of connected capacity as of May 2026, with projections to exceed 3.3 GW by year-end. Utility-scale installations dominate the portfolio, though residential microgeneration and rooftop systems continue expanding across thousands of homes and businesses. Government support through rooftop installation grants and recent record annual solar generation underscore the sector's momentum. However, this rapid growth is creating operational complexities that merit careful attention. As solar penetration deepens, Ireland faces the classic 'duck curve' challenge observed in mature markets like Germany and Spain—steep ramps in evening demand as daytime generation plummets, requiring substantial grid flexibility and storage investment. The transmission operator Eirgrid must now balance 100% renewable targets by 2035 while managing real-time stability across a system increasingly dependent on variable solar output. Battery storage deployment and market design reforms are becoming essential tools to unlock the economic and technical potential of the expanding fleet.