Our connection process

A tailored approach

Transpower's connection process adapts to fit the needs of your connection. For a small, discrete and simple connection you may be up and running on the National Grid in fewer than 18 months depending on demand and resource availability. Large-scale complex connections may take longer than three years to commission.

  • Step One: Contact us and discuss your requirements
  • Step Two: We will send you a Concept Assessment Questionnaire and if applicable a Transpower Services Agreement
  • Step Three: One of our subject matter experts will assess your request and requirements.
    • Our standard concept assessment turnaround time is 25-45 working days depending on levels of inquiry and the complexity of each case – the graph below is updated monthly.

Concept Assessment volumes

November 2023 update - we presently have 12 active concept assessment requests and an increasing number of active investigations for customer projects



Welcome to the power team

When you connect to the New Zealand Grid you become one of our customers and will be given a dedicated Customer Relationship Manager and individual engagement plan. Read more.

For further information on our process check out the information below or contact us at [email protected].

New customer - information checklist

New Connections General FAQ

Your Customer Journey

The image below shows a typical customer journey with Transpower from initial contact through to ongoing operations, lifecycle replacement and connection enhancements.  We can be flexible to meet your needs, so your journey may take a different path.

Customer Journey

New Application stage for generation and storage connections

To manage increasing interest in connecting grid scale generation and storage, and to focus resourcing on projects which are more likely to be built, Transpower has introduced a new formal Application stage for grid scale generation and storage connection requests.

Applicants for grid scale generation and storage projects requiring new Transpower assets will need to:

  • provide evidence of project readiness via an Application Form, and
  • agree to Transpower publishing limited project information, and
  • pay an Application Fee, and
  • meet project milestones to demonstrate progress during the Investigation and delivery stages.

For further information on our Application stage check out the information below or contact us at [email protected].

Connection Management Framework Decision Document (3/11/2022)

Connections Management Framework Process Slide Pack (V1.0 - 3/11/2022)

Generation and Storage Connection Application Form (V1.0 - 1/11/2022)

Application Form Guidance Notes (V2.0 - 12/1/2023)

Competing connections

How do we manage competing connections?

The electricity market in New Zealand is designed to be competitive, encouraging economic investment in new generation to compete against, and potentially replace, existing generation. As a regulated monopoly Transpower provides open access connections to New Zealand’s power system. Transpower will connect any new development (generation or demand) where the new connection is technically and logistically feasible, the developer covers all incremental costs associated with the connection, and our ability to operate the power system for the benefit of New Zealand is not compromised. Transpower does not consider the economics of a connection and does not provide advice on whether a project will be financially viable.

With open access there is no guaranteed right to transmission capacity beyond the use of the dedicated Transpower assets forming your direct connection to the power system. After you are connected Transpower may connect competing generation to local Transpower assets not dedicated to your connection.  This may require you to compete for transmission capacity in the wholesale electricity market.

For a proposed new point of connection Transpower commits any local spare connection capacity on a first ready first served basis. Spare capacity is committed when we have accepted an application request for your connection and is conditional on your demonstration of reasonable progress against an agreed project milestones. We do not allow companies to ‘reserve spots’ earlier in the connection process to mitigate the risk developers might bank connections for projects that will never be built.

If you have an active connection project with Transpower, but are yet to commit to a Transpower connection, we may receive a request from another party to invest in a connection at the same location. In the interests of operating transparently whilst protecting confidentiality, if we receive a competing connection request at your connection location we will inform you of the existence of this request, and any potential impacts to your project.

We have implemented a new generation connection management framework including a new formal application stage for generation connections and publication of our generation and non-generation connection pipelines, with the aim of giving you increased transparency and certainty for your proposed connection in relation to other competing connection requests.

Where multiple parties share a connection location and there is a present or future need for a capacity upgrade to connection assets at that location, all connected parties must agree between them how they will share the Transpower cost to implement an upgrade.  In accordance with the Code, Transpower does not determine cost sharing arrangements for capacity upgrades to shared connection assets subject to customer investments. Transpower may facilitate this conversation and may suggest methodologies which connected parties have used in other locations, e.g. a ratio based on anytime maximum load or generation. For shared load connections the following flow chart outlines the process and the associated regulations.

Shared connection upgrade process flow chart