MainPower New Zealand Limited is an electricity distribution company, based in Rangiora, New Zealand, responsible for electricity distribution to nearly 42,000 customers in the Canterbury region north of the Waimakariri River.

MainPower has initiated a number of local generation projects, including the Mount Cass Wind Farm (proposed)[3] and Cleardale Hydro Power Station (operating).

[4] MainPower has a total service area of 11,180 square kilometres (4,320 sq mi), covering the Waimakariri, Hurunui and Kaikōura districts.

The area includes the towns of Kaiapoi, Rangiora, Oxford, Woodend, Pegasus, Amberley, Waipara, Culverden, Cheviot, Hanmer Springs and Kaikōura.

Other projects in progress include upgrading the 33 kV subtransmission line between Cheviot and Kaikōura to 66 kV, and preparing for a new "Rangora East" GXP between Rangiora and Woodend to supply Woodend and Pegasus, offloading Kaiapoi GXP.