The lowest inflows in 79 years to two of Meridian Energy's two key hydro catchments saw New Zealand's largest electricity generator cut generation sharply in the three months to June 30.
With full year profit results due out on August 13, the state-owned all renewables generator and retailer also allowed customer numbers to fall in the fourth quarter, as it scaled back customer acquisition campaigns because of the prolonged dry spell which required water conservation in its Waitaki and Waiau catchments.
Meridian generated a total of 1,995 Gigawatt hours of hydro-electricity in the three months, compared with 2,228 in the three months to the end of March.
Comparisons with the previous year are not strictly relevant, as the company sold its Tekapo A and B hydro stations to Genesis Energy in the course of the year, as part of wider government electricity market reforms to promote greater retail competition.
"The integrated nature of our wholesale and retail business has been key to managing the record low inflows ... through a combination of conservative generation and acquisition of hedge cover to meet contract load," said chief executive Mark Binns in a statement.