Distributed Generation

Distributed Generation

The connection of distributed generation is regulated by the Electricity Authority via the Electricity Industry Participation Code 2010, Part 6, Connection of Distributed Generation. Powerco has three Standards documents (see below for links) based on the Code which are designed to help people wishing to connect distributed generation to the Powerco network.

Powerco Distributed Generation Policy (updated March 2018)
393S012 Embedded Generation Over 10kW Standard - Generate
393S089 Embedded Generation up to 10kW Standard - Generate 

The application and connection process

For systems up to 10kW capacity, typically solar panels, the process is as follows.

  1. You must apply on the appropriate application form, either under Part 1 or Part 1A of the Code, completing all details requested, to enable us to accurately identify the electrical location of your proposed generator. We will advise you if an application fee is payable.

  2. We will assess the impact your generation will have on our network. You may wish to generate more power than the transformer at your gate is designed to transport, or have neighbours who are also generating into the same transformer.

    Powerco promotes the safety of staff and contractors who may be working on its networks. We also need to ensure safety of the general public and the integrity of the network at all times. Accordingly, Powerco must know the location and capacity of all connected generation, and have the ability to isolate the generating plant from the network from time to time for operational and maintenance purposes.

  3. We will advise if your application is approved under Part 1 within 10 working days, or if under Part 1A within two working days of receiving it. Once approved, you or your contractors can install and test your system.

  4. Powerco requires a copy of the electrical Certificate Of Compliance and the Commissioning declaration to be provided as soon as possible after completion, before the system is permanently switched on. 
  5. You or your contractor must request a metering upgrade (if required) from your electricity retailer.  The Code requires that all generation installations must have metering which separately records imported and exported energy. 

    Applications for the connection of distributed generation over 10kW capacity are subject to the regulated application fee, and have longer times to process under the Code. This is because they require more detailed technical investigation into their effect on the network. When connecting distributed generation to our network, there may be costs associated with design and reinforcement of the existing network. If network reinforcement is required, the costs, design and schedule for this project work will need to be factored into your installation planning.

Application Forms

Click on the links below for the Word version of the application forms depending on the capacity of your installation.

  • For distributed generation up to 10kW capacity (DocX  or PDF
  • For distributed generation over 10kW capacity (DocX or PDF)

Please email the completed forms and supporting documentation to DistributedGeneration@powerco.co.nz or post a copy to:

Distributed Generation
Powerco Ltd
Private Bag 2061
New Plymouth

Want to know more? View more information about:

Network Export Congestion

The following localities are subject to export capacity constraints due to installed distributed generation capacity approaching network capacity ratings.

Transformer TC2-267, 2193 S.H. 2, Apata
Transformer X1512, 107 Veale Rd, New Plymouth
Transformer TC5456, 92 Comers Rd, Whitianga
Transformer TF3-004, 1303 Omanawa Rd, Tauranga
Transformer TE3-145, 55 Williams Rd Nth, Tauranga
Transformer X2486, 327 Bushy Park Rd, Whanganui
Transformer T9/373, Ngarata Rd, Alfredton
Transformer TE3-145,  Williams Rd, Pyes Pa
Transformer Y3199, 116 Croydon Rd, Midhirst 

We do not expect any other locations to be constrained within the next 12 months

You can view further information about distributed generation and the Electricity Industry Participation Code, Part 6, Connection of Distributed Generation on the Electricity Authority’s website at www.ea.govt.nz

If you have any queries about distributed generation please email DistributedGeneration@powerco.co.nz

List of Approved Inverters

For a list of inverters approved for the use on Powerco's electricity network follow this link https://www.cleanenergycouncil.org.au/industry/products/inverters/approved-inverters

If you have any queries about distributed generation please email DistributedGeneration@powerco.co.nz