More than 100,000 homes and businesses across Northern Ireland have switched to energy provider Airtricity, the company said.
Airtricity now supplies 85,000 homes and 15,000 businesses with electricity. Owned by the FTSE listed and Scotland-based company SSE plc, Airtricity supplied a total 1533 GwH of electricity to its customers last year.
Airtricity managing director Stephen Wheeler said: "Two years after Airtricity entered the domestic market for electricity and 10 years after the company began trading competitively in Northern Ireland, I am delighted to announce that we have now switched 100,000 customers.
"This success cements Airtricity as a major energy player in the Northern Ireland economy and affirms our position as the leading driver of competition in the country's energy market."
Mr Wheeler said increased pressure on finances in the home has added to the company's appeal to the consumer, due to the value of the energy they provide.
"Our continued success in the domestic electricity market means that more and more customers who switch from Power NI to Airtricity are enjoying the reassurance of better value energy from a trusted energy provider.
"Increased pressure on home finances means that our growing number of customers appreciates the importance of making savings on household bills and that switching to Airtricity is an easy and simple way to save money," he said.