Southbrook Substation Upgrade

Overview: Rangiora and the surrounding area is experiencing significant growth through new subdivisions and businesses. Southbrook zone substation, which supplies this region, currently operates at 33kV. This project upgrades the substation to a higher capacity 66kV/11kV 40MVA zone substation. This also improves operational capability with neighbouring zone substations and improves the Southbrook site’s resilience.

More news

MainPower welcomes new Chief Executive, Sean Horgan

12 January 2026

MainPower Trust seeks nominations for Trust elections

22 December 2025

MainPower secures future for Mt Cass Wind Farm through strategic transition

19 December 2025

Outage notifications

No current notifications

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

No current notifications

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.

Quick links