Meridian Energy had a strong first half after winter storms filled its southern hydro catchment at Lake Pukaki and boosted sales.
Battery-powered cars may go from 10% of global sales in 2021 to 40% by 2030.
Company bosses are wondering how to manage and pay for Huntly power station.
The forecasts show that petrol demand will peak around 2024-25 as the country's light vehicle fleet electrifies.
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articles by Ian