About 1200 customers in the Taihape region in the central North Island remain without power after last weeks snow storm and it could take a few more days to restore supply to some customers.
That's the latest update from Powerco, which estimates it will cost at least $2 million to repair the damage caused to its network by the storm.
"People are saying it's the worst snow storm in that region since 2002," Powerco operations manager Phil Marsh says.
"On that occasion our network received massive damage and this is just as bad."
Power was cut to 10,000 homes at the peak of the storm.
The Central Plateau was the worst-affected area.
"We are gradually mopping up problem areas in other parts of our western region in Wairarapa, Manawatu, Whanganui and Taranaki. Once we are on top of those, more crews will be sent to the Central Plateau to continue restoration work there," Mr Marsh said.
About 100 poles and kilometres of power lines were brought down in the storm in that area.
SH1 Rangipo to Waiouru (Desert Road) was open on Sunday and most other roads in the central North island had earlier re-opened.