The potential closure of Tiwai Point aluminium smelter would translate to significant additional investment in transmission assets, Genesis Energy says.
Electricity generator and retailer Trustpower has had operating earnings cut by 17% to $107million for the first half of its financial year on the back of plant outages and lower inflows.
It was a good year for the country's tech exporters, who earned $12billion in total revenues for the first time - more than 10% of New Zealand's total export receipts.