Notice issued by Transpower means available supply should still exceed demand, unless something unexpected were to happen. Transpower has called for power companies to increase their generation to reduce the risk of power cuts this evening. The notice reflects the risk that there could be insufficient power during peak evening demand if unexpected events were to reduce supply. But Transpower nevertheless advised that power cuts were again a possibility if generators did not respond adequately. Power demand usually peaks at about 6800MW during winter mornings and evenings.

Source: Stuff June 28, 2022 05:35 UTC