Contact Us

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SEMOpx Helpdesk

Ireland: 1800 283 010
Northern Ireland: 0800 008 3010
International: +353 1 668 8183

The SEMOpx Helpdesk is available Mon-Fri from 9.00am until 5.00pm, for all general queries or non-urgent operational queries.

1. Urgent Auction operational issues: 7am-7pm*
2. Urgent Continuous operational issues: 24 hr
3. General queries and Registration queries 9am-5pm

SEMOpx customer support for urgent queries is available 24/7, 365 days a year.

* The Auction Team are available daily from 7am to 7pm. Any queries received after 7pm will receive a response the next working day.

This should only be used for emergency operational issues relating to Day-Ahead Market and Intraday Market.

For a detailed breakdown of queries with the correct points of contact please refer to SEMOpx Contacts

Our Locations

Republic of Ireland

SEMOpx Customer Service
160 Shelbourne Road
Dublin 4
D04 FW28

Fax: +353 1 237 0035

Northern Ireland

SEMOpx Customer Service
Castlereagh House
12 Manse Road
Belfast BT6 9RT

Fax: +44 2890 707555