Northland roads have proved treacherous over the past two days with a series of crashes, including a tree-felling truck which fell over.
The Northpower truck ended on its side yesterday on Tauraroa Rd in Maungakaramea about 9.30am.
Northpower spokesman Steve MacMillan said the company would investigate the cause of the accident. Nobody was injured.
"It appears a rear wheel of the truck has entered a water table on a slight downhill gradient and the driver has subsequently lost control," Mr MacMillan said. The driver was unhurt.
"These Northpower aborist crews are meticulous with their safety given the work they do and we have not had one of these trucks come to grief previously."