New Zealand electricity production of 1,225 GWh was unchanged from a year earlier, as North Island wind production fell 9 percent and while South Island hydro production rose 8 percent.
The volume of retail electricity sold rose 12 percent to 2,051 GWh in the first half. It had 255,000 accounts in the first half, including 21,000 gas accounts, the company said. Telecommunications customers rose to 35,000.
"While the retail energy market remained highly competitive throughout the period, Trustpower continued to experience lower levels of customer churn than the market overall," it said.
Net profit included fair value losses on financial instruments of $4.4 million, compared to a year-earlier gain of $10 million. Earnings before interest, tax, depreciation, amortisation, fair value movements of financial instruments and asset impairments rose 13 percent to $173 million.
Gearing rose to 45 percent at Sept. 30 from 43 percent at March 31, as the company increased borrowing to complete Snowtown Stage 2 and acquire the Green State Power assets. The company said is plans to refinance $75 million of bonds maturing in December with a similar bond offer.
Trustpower will pay a first-half dividend of 20 cents a share on Dec. 12, with a record date of Nov. 28.
The shares rose 0.3 percent to $7.52 and have gained 15 per cent this year.
See TrustPower's financial statements here: