Wellington, Feb 23 NZPA - Contact Energy says electricity retail prices need to rise, after reporting flat underlying earnings for the six months to the end of December.

Wellington, Feb 23 NZPA - Contact Energy is reporting a big jump in reported profit for the six months to the end of December, but its underlying earnings after tax were barely changed from a year earlier at $80.1 million.

Wellington, April 20 NZPA - New Zealand power bills could increase by nearly $30 a month if New Zealand's gas price becomes linked to international prices, an energy analyst says.