No power?

MainPower carries out regular maintenance and upgrade work across North Canterbury. From time to time, you may be affected by a planned power outage. If this is the case, you will be notified ahead of time by your electricity retailer.

If your power goes off, you can find out if it is a planned or unplanned outage on the MainPower outage map.

If you cannot find your outage on the map, there are some things you can do to try and diagnose the problem. Click here to find some tips to find the cause of a power outage.

If you need help or would like to report an outage, call our 24-hour faults line on 0800 30 90 80. In an emergency, call 111.

We’re here to help. Get in touch if you need help. Or, check out our FAQs.

There are two types of power outages

Planned outages are scheduled in advance so that work can be carried out safety on or around the electricity network. You will be notified about planned outages by your electricity retailer. MainPower also sends a text message to the electricity account holder advising of upcoming outages.

Unplanned outages are when the power goes out unexpectedly. This can happen for several reasons, such as car accidents, strong winds, earthquakes, or people accidentally hitting underground cables while digging.

No power? What to do

Unplanned outages can occur at any time. Typical causes of unplanned power outages include stormy weather, tree branches or debris falling on power lines, and car accidents.

Safety advice

Stay safe during planned or unplanned power outages. If you have any concerns, call us on 0800 30 90 80.

Outage FAQs

If you can’t find the answers you need, please get in touch with our team.

What can my business do to be prepared for a power outage?
  • Check your terms and conditions with your electricity retailer – it will detail notification periods for planned electricity network outages and any compensation clauses.

  • Check your insurance provisions – How long does power need to be off before the policy covers you?

  • Have a good backup plan, and make sure your staff know what to do during a power outage.

  • Consider the use of manual EFTPOS and credit card options.

  • Can your site be supplied by a generator? Know your capacity requirements, connection options, and generator hire contact details.

  • Have alternative locations for storage of perishable goods and freezer blankets.

  • Have a plan for working in alternative work locations and for diverting calls to mobile phones. Know which equipment needs to be reset after a power outage.

What should I do during a planned power outage?

If you will be affected by a planned outage, your electricity retailer will send you a letter in advance so you can make other arrangements. Planned outages are also listed on our website – visit the MainPower outages page.

Who is a priority customer?

Special consideration is given to the continuity of supply to customers whose health or livelihood could be adversely affected by an interruption. Priority customers include those who maintain essential services as well as medically dependent customers.

Customers with serious medical conditions who rely on continuity of supply to support life are treated as priority customers. Every effort is made to maintain continuity of supply and, if necessary, to advise them of any interruptions to supply so that alternate arrangements can be made. If you are a medically dependent customer, please ensure we are aware of your needs by contacting your electricity retail provider and letting them know. Or, contact us on 0800 30 90 80. Click here to find out more about medically dependent customers. 

Why do power outages occur?

There are two types of power outage: planned and unplanned.

Planned outages occur when we need to complete maintenance work on the network. If you will be affected by a planned outage, you will receive a notification from your chosen electricity retailer in advance.

Unplanned outages occur when unforeseen circumstances cause damage to the network (such as car accidents, or tree branches or other debris being blown into power lines).

Does MainPower charge for callouts?

MainPower provides a 24-hour fault response service. When a customer’s property or actions have caused the fault, the responsible customer will be charged a call-out fee.

Call-outs caused by a MainPower network fault will not incur a fee.

MainPower call-out fees

  • Fault call-out during normal working hours (7:30 a.m. to 5:00 p.m. Monday to Friday):

    • $228.00+GST minimum charge, plus travel.

    • Additional charges will be billed for any equipment required. Additional time during business hours will be charged at our standard rate ($114.00+GST per hour).

    • MainPower call-out fees are charged from the time our staff leave a depot to the time they return to a depot.

  • Fault call-out after hours:

    • $342.00+GST minimum charge, plus travel.

    • Additional charges will be billed for any equipment required. Additional time will be charged at our standard rate ($114.00+GST per hour).

    • MainPower call-out fees are charged from the time our staff leave a depot to the time they return to a depot.

All chargeable call-outs will incur a minimum fee for a two-hour period (plus travel costs). Where we are required to stand staff down as a result of attending an after-hours call-out, we reserve the right to charge a stand-down fee.

We’re here to help

If you need some assistance or advice, please get in touch with our team.

Important notifications

Hot water load testing under way ahead of winter

Until mid‑April, we’re working closely with retailers to carry out hot water load testing as we prepare our network for the coming winter season.

These tests run for a couple of hours each day, Monday to Friday, with no testing taking place over weekends. Because each test window is relatively short, customers are unlikely to notice any changes to their hot water supply.

The purpose of this work is to help us better understand how much controllable load is available during the summer months. Gaining accurate insights now means we can model customer savings more effectively by reducing system load at peak times. It also helps us assess whether this load flexibility could assist Transpower in deferring an upcoming local transmission upgrade.

This testing is an important part of ensuring a resilient, efficient network that supports our community.

MainPower Trust elections

Voting is open for the 2026 MainPower Trust election.

Voting packs have been emailed or posted by Electionz.com to everyone who pays a power bill on the MainPower network. You need to have the unique ID provided to cast your vote.

If you haven’t received a voting pack, or can’t find it, you can get a replacement by contacting iro@electionz.com.  For full details of the candidates, visit mainpowertrust.co.nz/trustee-elections/

Make the most of this opportunity to have your say on the future of MainPower – and your community.

Voting closes midday Friday 6 March 2026. 

Privacy Policy

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

Hot water load testing under way ahead of winter

Until mid‑April, we’re working closely with retailers to carry out hot water load testing as we prepare our network for the coming winter season.

These tests run for a couple of hours each day, Monday to Friday, with no testing taking place over weekends. Because each test window is relatively short, customers are unlikely to notice any changes to their hot water supply.

The purpose of this work is to help us better understand how much controllable load is available during the summer months. Gaining accurate insights now means we can model customer savings more effectively by reducing system load at peak times. It also helps us assess whether this load flexibility could assist Transpower in deferring an upcoming local transmission upgrade.

This testing is an important part of ensuring a resilient, efficient network that supports our community.

MainPower Trust elections

Voting is open for the 2026 MainPower Trust election.

Voting packs have been emailed or posted by Electionz.com to everyone who pays a power bill on the MainPower network. You need to have the unique ID provided to cast your vote.

If you haven’t received a voting pack, or can’t find it, you can get a replacement by contacting iro@electionz.com.  For full details of the candidates, visit mainpowertrust.co.nz/trustee-elections/

Make the most of this opportunity to have your say on the future of MainPower – and your community.

Voting closes midday Friday 6 March 2026. 

Privacy Policy

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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