Major projects

Read more about some of our major projects.

Introduction to the major projects can be added here.

Thongcaster Road Solar Project

MainPower has the required consents to construct a solar farm on a 10-hectare site at Thongcaster Road. When complete, the…

Cheviot to Oaro Sub-Transmission Line Upgrade

MainPower’s sub-transmission line between Oaro and Cheviot is constructed at 66 kV but is currently operating at 33 kV. This…

Amberley Zone Substation

In early 2025 we will begin construction on a new substation at 41 Reserve Road, Balcairn. In February and March…

Hanmer Springs Sub-Transmission Line Upgrade

We are upgrading the line that supplies electricity to Hanmer Springs from 33 kV to 66 kV. While Hanmer Springs…

Hanmer Springs Substation

As part of MainPower’s planning for future capacity, as well as the retirement of end-of-life assets, we are going to…

And, as always; we’re happy to assist, get in touch if you have any questions.

We’re here to help you navigate the terminology and process.

Rather than starting a form without really knowing what you’ll need, we would love you to just get in touch.

Outage notifications

WEATHER RELATED OUTAGES - updated 8.00am 29/10/2025

We’re making great progress restoring power across the network. Currently there are 85 customers without power, but we have a large number of crews in multiple locations again today.

We will have a helicopter operating in the Hurunui Mouth area around midday today. The helicopter is a twin engine and is carrying out complex river crossing repairs. It will be travelling low and slow, and it will be quite loud.

Please keep the area clear so our teams can carry out these urgent repairs to restore power to the area.

Estimated restoration times are regularly being uploaded to the Outage Map.

If you have any concerns or questions, please call our customer service team on 0800 30 90 80.

TREAT ALL POWER LINES AS LIVE AT ALL TIMES. Please stay away from any downed lines and report any sighting to us on 0800 30 90 80.

For the most recent updates on outrages, please check our outage map. To report an outage, call 0800 30 90 80.

We appreciate your understanding and patience during this time.

Is your outage not listed?

Troubleshoot your outage
Treat all lines as live during the outage period; power may be restored at any time. If you require further information, please call MainPower’s 24-hour faults line. To report an emergency, call 111.

Outage notifications

WEATHER RELATED OUTAGES - updated 8.00am 29/10/2025

We’re making great progress restoring power across the network. Currently there are 85 customers without power, but we have a large number of crews in multiple locations again today.

We will have a helicopter operating in the Hurunui Mouth area around midday today. The helicopter is a twin engine and is carrying out complex river crossing repairs. It will be travelling low and slow, and it will be quite loud.

Please keep the area clear so our teams can carry out these urgent repairs to restore power to the area.

Estimated restoration times are regularly being uploaded to the Outage Map.

If you have any concerns or questions, please call our customer service team on 0800 30 90 80.

TREAT ALL POWER LINES AS LIVE AT ALL TIMES. Please stay away from any downed lines and report any sighting to us on 0800 30 90 80.

For the most recent updates on outrages, please check our outage map. To report an outage, call 0800 30 90 80.

We appreciate your understanding and patience during this time.

Is your outage not listed?

Troubleshoot your outage
Treat all lines as live during the outage period; power may be restored at any time. If you require further information, please call MainPower’s 24-hour faults line. To report an emergency, call 111.

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