Electricity system operator Transpower has asked power companies to increase their generation to prevent power cuts on Tuesday evening as the electricity supply runs low.
A Transpower spokesperson told Newshub there was a low level of residual generation expected for the evening peak.
"The low residual generation was due to the expected electricity demand being higher than predicted, and less wind generation available than offered."
The spokesperson said a Customer Advice Notice (CAN) went out to the industry this afternoon and since additional generation has been offered into the market.
"At this stage, we do not anticipate any disruption to consumers' electricity supply."
It comes just five days after the system operator issued a national grid emergency following insufficient energy offers.
On Thursday, a freezing-cold morning and three electricity units failing at the same time saw Transpower warn of potential power cuts due to the risk of "insufficient energy offers" for all of New Zealand to meet demand between 7:54am and 9am.
"If participant response across the country is insufficient, the system operator will manage demand to alleviate the grid emergency," Transpower said.
"The system operator may instruct the grid owner to disconnect feeders without further notice to connected parties."
On Monday, Transpower reassured Kiwis enough power is available this winter despite last week's system scare.
"We believe that there is enough, sufficient generation," Transpower chief executive Alison Andrew told AM.
She added its forecasts show there may be a few "tight" electricity days in the coming months, which could be when generation plants or transmission circuits were down for maintenance.
"Generally, we'll work together [with the industry] to make sure we can find a way to give us sufficient generation capacity available for that time," Andrew said.
New Zealanders could continue using power as normal, she added.
"I can never guarantee to you that we won't have a power outage - no one can do that - but what I can guarantee to you is that we will work hard as an industry to make sure there is sufficient generation and, like we did last Thursday, make sure no one needs to have their power turned off."
