SONI (System Operator for Northern Ireland) is the Electricity Transmission System Operator for Northern Ireland. Bringing electricity to every part of Northern Ireland and plan ahead for future growth. From their control centre in Belfast, SONI match supply and demand for power every second of every day by using the transmission system.

SONI is independent from NIE Networks. Since 2014, SONI has been responsible for planning for the future of the grid, while NIE Networks is responsible for maintenance, repairs and construction of the grid.

Since 2009, SONI has been part of the EirGrid Group. SONI also operates the all-island wholesale electricity market with EirGrid through the Single Electricity Market Operator (SEMO) which has been in operation since November 2007. SONI is regulated by The Utility Regulator (UR). SEMO is regulated cooperatively by the Commission for Regulation of Utilities Water and Energy (CRU) and UR through the Single Electricity Market Committee (SEM-C).

Learn more about SONI in the following videos below.

Contact SONI

Tel: +44 (0)28 90794336