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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…

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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…

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Amberley Zone Substation

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

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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…

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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…

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

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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.

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Outage notifications

Maintenance - Swannanoa Substation

Due to maintenance of Swannanoa Substation streetlights will remain switched on in the greater Swannaona area from Sunday 21/09/25 trough to Saturday morning 11/10/25

Outages
0800 30 90 80

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

Maintenance - Swannanoa Substation

Due to maintenance of Swannanoa Substation streetlights will remain switched on in the greater Swannaona area from Sunday 21/09/25 trough to Saturday morning 11/10/25

Outages
0800 30 90 80

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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0800 30 90 80
Outages
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