"It's pleasing to see continued growth in retail sales, which reflects an enduring commitment to excellent customer service and support. Our retail performance has helped offset the impact of NZAS exit pricing, and we're making sound progress on our strategy to develop new sources of South Island demand following the Tiwai contract end in 2024," Barclay said.
At the start of 2021, Meridian cut a deal with the smelter's owners to keep it operating until at least the end of 2024, lifting the threat of closure.
Now Meridian and Contact - which also generates a large proportion of its revenue from the lower South Island, making it exposed to a loss of demand there - are seeking alternative uses for electricity in Southland.
Meridian's board has declared an interim dividend of 5.85c per share, a 2.6 per cent increase on a year ago.
In January, Meridian completed the sale of Meridian Energy Australia for A$740m (NZ$793m). The company said it expected to report a gain on the sale of $240m for the year to June 30.
"This transaction is an outstanding result for Meridian's shareholders and a testament to the quality of the Meridian Energy Australia business and the employees who have been dedicated to its success," Barclay said.