The recent stormy weather - with strong gusting winds - led to a record amount of electricity being generated by wind power over the past 24 hours.
Donegal is one of the biggest wind energy producers in the country.
At one point, in excess of 60% of all electricity on the whole island was being generated by wind power.
The Republic of Ireland and Northern Ireland are linked by an interconnector and surplus electricity can be exported from one to another when the occasion arises.
The gusty and varying levels of wind led to significant technical challenges for both ESB Networks and its SONI counterpart in Northern Ireland.
At 9.00 pm this evening the amount of electricity being generated from wind turbines stood at 38%.
Last year 21% of Ireland's electricity demand was met by wind power, according to wind industry figures.
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