Ireland's grid set a battery discharge record as renewables supplied 41%

What happened

EirGrid's provisional system data indicate that renewable sources supplied about 41 percent of Ireland's electricity in November 2025. Wind provided 35 percent, or 1,067 gigawatt-hours, while batteries reached a then-record 362 megawatts of discharge at one point on November 25. The battery record followed a November 14 market-system update that allowed registered energy-storage power stations to participate more directly in real-time balancing.

Why it matters

A power system with more variable wind and solar needs fast, flexible resources to balance supply and demand. Ireland's result offers an operating-system example of batteries taking on a larger balancing role, but the 362-megawatt figure is an instantaneous power record rather than the amount of energy delivered over the day.

What to watch

• Final metered data and any revisions to EirGrid's provisional November generation shares.
• Whether battery participation continues to grow after the real-time market integration update and helps reduce renewable curtailment.
• How transmission upgrades, interconnection, storage duration, and demand flexibility affect reliability as Ireland adds more renewable generation.

Sources & evidence

• Renewables provided around 41% of electricity in November as new record for battery discharge is setEirGrid release dated December 8, 2025, reporting provisional Ireland-only 15-minute SCADA data. The figures exclude some embedded and non-centrally monitored generation, including rooftop solar, and remain subject to metering revisions.
• Grid upgrade to boost battery storage role in power systemEirGrid explanation of the November 14, 2025 system update that integrated qualifying energy-storage power stations into real-time electricity-market operations.

Topics

• Ireland
• Renewable Energy
• Battery Storage
• Wind Power
• Grid Balancing