New Zealand generation stack updates
MBIE is responsible for maintaining data on New Zealand’s generation stack. This is a list containing information on the costs of existing and new electricity generation plants in New Zealand.
About the generation stack
The generation stack is used to assist with understanding and determining what electricity generation capacity is required to be built and when, in order to meet forecast electricity demand. It is a key input to modelling performed by MBIE, Transpower, and the wider electricity industry.
There have been two updates of the generation stack:
- An update to information for all types of electricity generation plant technologies, commissioned in 2011 by the then Ministry of Economic Development
- Updates jointly commissioned in 2019 and 2020 on a technology-specific basis
Since 2011, there have been advances in electricity generation technologies and costs. This led MBIE, with the support of Transpower, to engage subject-matter experts over 2019 and 2020 to review and update the information produced in 2011. Unlike the 2011 update, this was done on a technology-specific basis.
The resulting reports from these reviews are published below as they become available. You can subscribe to our mailing list to get alerts.
As at March 2020, reviews have been completed for geothermal and wind, and are underway for solar, hydro, and thermal.
Lawless Geo-Consulting was commissioned to provide estimates of the possible timing, cost, and opportunities for future development of geothermal electricity generation in New Zealand. This work also included an assessment of the interaction between direct use of geothermal and electricity generation.
This report, produced by Roaring40s Wind Power, includes an updated wind generation stack, an assessment of the potential for offshore wind in New Zealand, and the potential trend of technology costs.
The 2011 NZ Generation Data Update was a comprehensive review and update of technical and cost data on existing and potential future electricity generating plants in New Zealand. A key improvement in this dataset over similar existing datasets was the explicit separation of capital and operating costs into both a New Zealand dollar (NZD) component and Foreign Currency (FX) component. This makes it easy to see the impacts of exchange rate fluctuations, particularly on the capital costs of new generation.