Medically dependent customers

A medically dependent person is someone whose health relies on a stable electricity supply to power essential medical equipment. For these individuals, a power outage could result in serious injury or even life-threatening consequences.

If you are a medically dependent customer, your doctor or specialist will provide you with a notice confirming your status. This should be passed on to your electricity retailer as soon as possible to ensure you are registered as a “medically dependent customer” on their records.

For more information about medically dependent status, please contact your electricity retailer.

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

Changing electricity retailers

If you decide to change to a different electricity retailer, remember to inform your new retailer about your medically dependent status. They won’t be aware of your needs unless you tell them.

Power cuts and emergency preparedness

Power outages can occur for various reasons. Even if you are medically dependent, a continuous electricity supply cannot be guaranteed. 

It is your responsibility to have a no-power plan if the power goes out. Work with your health practitioner to develop a plan that will provide you with instructions on how to stay safe and well if the electricity supply is interrupted. For some hints and tips to help in a power outage visit our no-power planning page.

No power? What to do

You will be advised by your retailer in advance of any planned outages. Unplanned outages can happen at any time. If you are a medically dependent customer you should have a no-power plan.

Medically dependent customer FAQs

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

How can I register as a medically dependent customer?

If you or someone in your household is medically dependent on electricity to prevent serious harm to health, you should get confirmation of this from a health practitioner such as your GP.

Then, you must register as a “medically dependent customer” with your electricity company.

Does my medically dependent status change if I move house or change electricity retailers?

If you move home or switch to a different electricity retailer, you need to check with your electricity retailer that you are still registered as a medically dependent customer. 

What happens during a power outage if I am a medically dependent customer?
  • Follow your emergency response plan if the power cut puts you at risk of harm.
  • Notify your electricity company immediately so they are aware you do not have an electricity supply.
  • In a medical emergency, call 111.
How do I prove that I am medically dependent?

Your electricity retailer will be able to provide some more information about the process. You will need evidence from your health practitioner to be registered as a medically dependent customer.

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

Unplanned outage

Fault – Hanmer Springs / Lewis Pass
MainPower is aware of a fault affecting the Hanmer Springs and Lewis Pass areas. Our crews are currently on site at the fault location. Restoration is estimated to be early this evening.
We will continue to provide updates as more information becomes available. Please treat any fallen or damaged lines as live and maintain a 10 meter distance.

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

Unplanned outage

Fault – Hanmer Springs / Lewis Pass
MainPower is aware of a fault affecting the Hanmer Springs and Lewis Pass areas. Our crews are currently on site at the fault location. Restoration is estimated to be early this evening.
We will continue to provide updates as more information becomes available. Please treat any fallen or damaged lines as live and maintain a 10 meter distance.

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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