One network, many suppliers
Ireland's setup is simpler than most. ESB Networks is the only company that owns and repairs the distribution network, serving about 2.5 million customers. Whichever supplier you pay, the fault goes to the same place.
The confusing part is the name. People say "ESB" for the network, but Electric Ireland is a separate supplier brand. Calling your supplier about a power cut only delays things, because it can't send a crew. Save 1800 372 999 and you'll reach the right people from any county.
Using PowerCheck
PowerCheck is ESB Networks' own service map. It shows current faults and planned work, and you can search your own address. It drew 6.5 million unique visitors in 2025, which gives you a sense of how much people rely on it during storms.
ESB Networks doesn't publish an open data feed or a running national count, so this site can't show a live total for Ireland. Numbers usually appear only in its press statements during major storms. PowerCheck stops at the border too: the six Northern Ireland counties use NIE Networks and its own map.
Why Atlantic storms hit Ireland so hard
Ireland's network has six times as many overhead lines as underground ones, so strong winds reach it easily. That's why the country's largest power cuts all trace back to named storms.
Storm Éowyn in January 2025 broke every record, with about 768,000 customers out at the peak. Almost 70% were reconnected within 72 hours and 90% within a week. Before that, Storm Darragh in December 2024 left about 395,000 off supply, and Storm Ophelia in 2017 reached 385,000.
Different storms hit different places, so your province's history matters. Storm Isha in 2024 was worst in Donegal, Sligo, Leitrim, Mayo, Cavan, Longford and Roscommon. Storm Ellen in 2020 hit southern, western and midland counties, including about 40,000 customers in Cork. Storm Emma in 2018, the Beast from the East, mainly affected the east and greater Dublin.
What the reliability figures leave out
ESB Networks reports 131.72 minutes lost and 1.473 interruptions per customer for 2025. These are unplanned outages only, and storm days are excluded, so Storm Éowyn isn't in that number. They show everyday performance and not what happens in a bad winter, which is worth remembering if you depend on electricity for medical equipment or heating.