Solar & distributed generation
Distributed generation is the equipment used by customers to generate their own electricity (for example, solar panels). Connecting distributed generation to the MainPower distribution network allows customers to sell any excess power generated back to their retailer.
Anyone who meets the applicable safety, technical, operational, and commercial requirements can connect to the MainPower network.
We recommend that before you submit your application, you make contact with our Network Services Representative team to discuss your needs (0800 30 90 80 or nsr@mainpower.co.nz).
We recommend having an electrician/installer fill out the forms.
A good understanding of electricity is required to successfully complete the forms. We recommend that you ask your electrician or installer to complete this form on your behalf.
Apply for a solar/distributed generation connection
Click below to get started.
Are you looking for a solar/distributed generation connection?
For example, your property’s power will be generated by wind, solar, thermal or hydro power.
Relevant documents
Here are some links to information and agreements you might need when you’re applying.
Guide to Connecting Distributed Generation to the MainPower Network
Make sure you read our Connection Agreement, which outlines our relationship and roles and responsibilities when you connect to our network.
Users of our network must comply with our Network Connection Standards.
Part 6 of the Electricity Industry Participation Code 2010 sets out information regarding connecting distributed generation.
Even if your generation will not connect to MainPower’s network (either directly or as part of a mains-connected installation) it will still need to comply with the following requirements.
Electricity (Safety) Regulations 2010 (particularly part 5)
AS/NZS 3000:2007 (this standard can be purchased from Standards New Zealand)
- Note: AS/NZS 3000:2018 has not been fully gazetted in New Zealand. While the 2018 edition was published, the Electricity (Safety) Regulations 2010 still cites AS/NZS 3000:2007. This means the 2007 standard, including its amendments, is the standard that must be used for compliance with the regulations until the regulations are updated.
- Note: AS/NZS 3000:2018 has not been fully gazetted in New Zealand. While the 2018 edition was published, the Electricity (Safety) Regulations 2010 still cites AS/NZS 3000:2007. This means the 2007 standard, including its amendments, is the standard that must be used for compliance with the regulations until the regulations are updated.
Inverters
If you are connecting through an inverter you will also need to comply with the following standard:
- AS/NZS 4777.2:2020
Read the full list of approved inverters here.
For more information on standards, visit Standards New Zealand or SAI Global. Please note that you will be required to purchase standards.
When connecting generation to the MainPower network, the following technical standards apply:
AS/NZS 5033.2012
AS/NZS 4777.1:2016
AS/NZS 4777.2:2020
AS/NZS 3000:2007
Export constraints & curtailment
The following export constraints are currently in place. If you think your application will be affected by these constraints, please get in touch with our Network Services Representative team to discuss your options.
Mt Cass Road – east of the confluence of Omihi Creek and the Waipara River.
MainPower reserves the right to interrupt the connection of any Distributed Generation to the Network, or curtail either the operation or output of Distributed Generation, or both, and may temporarily disconnect the Distributed Generation from the Network under the following circumstances:
(a) Whenever MainPower deems it reasonably necessary for planned maintenance, construction, or repairs on the network.
(b) In emergency situations or for the purpose of protecting or preventing danger or damage to persons or property.
(c) If the Customer modifies its Distributed Generation without obtaining prior authorisation from MainPower, and such modification has a material effect on the injection of electricity from the Distributed Generation into the network.
(d) As a consequence of obligations imposed on MainPower that, in MainPower’s opinion, could affect the operation of the Distributed Generation. This includes obligations imposed by Transpower New Zealand Limited, both as the owner of the National Grid and as the System Operator, obligations to an electricity retailer, or obligations arising in respect of other distribution networks, or imposed by law, including the Electricity Industry Participation Code 2010.
(e) In the case of a prevalence or saturation of DG installations on any part of MainPower’s Network leading to operational issues, including but not limited to excessive voltage or compromising of protection equipment or settings.
When connecting generation to the MainPower network, the following technical standards apply:
AS/NZS 5033.2012
AS/NZS 4777.1:2016
AS/NZS 4777.2:2020
AS/NZS 3000:2007
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We’re here to help
If you need some assistance or advice, please get in touch with our team.