Meridian Energy reported a 39 per cent increase in first-half profit, boosted by improved generation and sustained high prices in October and November.
The country's biggest power generator had a net profit of $152 million in the six months through December, from $109 million a year earlier. Earnings before interest, tax, depreciation, amortisation and changes in financial instruments rose 18 per cent to a record $389 million, from $329 million a year earlier.
Meridian, which operates the country's biggest hydro dams on the South Island and some of its largest wind farms, benefited late last year when maintenance work at the Pohokura gas field reduced supplies just as hydro storage was also declining and other generators had plants shut for maintenance.
It has also benefited from the Tiwai Point aluminium smelter – its largest single customer – restarting its fourth potline after a six-year break and from the expansion of its generation business in Australia early last year.
"Good hydro storage has seen our New Zealand generation volumes increase 10 per cent on the prior period, supporting higher contracted sales," chief executive Neal Barclay says.