Irish Grid Battery Storage Discharge Power Reaches Record High Of 396 MW in December

Irish Grid Battery Storage Discharge Power Reaches Record High of 396 MW in December

 

Battery discharge power in the Irish transmission system reached a record high for the second consecutive month in December, reaching 396 megawatts (MW). According to the latest data from state-owned transmission system operator EirGrid, this record was set on Monday, December 15th, surpassing the previous record of 362 MW set on November 25th. This latest record comes after Ireland opened its wholesale market to battery storage under a new dispatch plan last November, a move that creates opportunities for technology providers such as BLOOPOWER to contribute advanced energy storage solutions to the grid.

 

 

Overall, renewable energy accounted for 43.8% of Ireland's electricity generation in December. The majority of this came from wind power, accounting for 38.5%, an increase of nearly 4 percentage points from the previous month; solar power accounted for 0.5%. Despite the decrease in solar photovoltaic (PV) share during the winter months, 2025 was still a record year for Irish household solar PV systems. According to the Sustainable Energy Authority of Ireland, a record 34,088 households installed solar panels last year, a 16% increase year-on-year.

 

On Christmas Day, December 25th, the peak electricity demand shifted from the evening to lunchtime due to the use of appliances such as ovens for preparing dinner, with renewable energy meeting 55% of electricity demand that day. ​​New Year's Eve was different, with celebrations concentrated in the late evening, so the peak demand did not shift, more closely resembling observations on most winter nights.