Electric Ireland is set to hike their customers' electricity bills by 30% in May.
The Consumer Council says the rise will mean a £219 increase for customers with a typical credit meter and keypad (PAYG).
Raymond Gormley, Head of Energy Policy at the Consumer Council, said: “This news will adversely impact all Electric Ireland customers who are already experiencing financial pressures on their household budget especially with the cost of living crisis that we are experiencing.