• A solar farm could reduce Stewart Island’s diesel use by up to 75%.
  • Council aims to implement renewable energy for reliable, affordable electricity and economic growth.
  • The project includes staged solar and wind energy solutions to benefit the island’s future.

Stewart Island is set to take a significant step toward reducing its reliance on diesel-generated electricity, with plans for a solar energy farm and battery storage system. This project could replace up to 75% of the diesel currently used to power the island.

At a public meeting attended by around 80 residents, Mayor Rob Scott, councillor Jon Spraggon, and community board chair Aaron Conner, along with technical experts from PTM, outlined the proposed approach. "It was a good meeting with people asking excellent questions and showing a high level of engagement and support for the planned approach," said Mayor Scott.

The initiative is the result of 18 months of focused work by the steering group, which secured $300,000 of government funding to investigate the best solution for the island’s high electricity costs. PTM's analysis identified a 2MW solar farm with a 4MWh battery system as the most effective option, providing about 75% diesel displacement.

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“We have agreed that a staged approach will be the best way to achieve immediate benefits and to go with the recommended option, which will not only reduce reliance on diesel to a large extent but also be a more future-proof solution," Mayor Scott explained.

Stage one of the plan involves building the solar energy farm and battery system on suitable land to supplement the island's diesel generators. Efficiency improvements to the entire network and diesel systems are also planned. Stage two will explore adding a second renewable energy source, such as wind power, to further reduce the island's dependency on fossil fuels.

The ultimate goal is for Stewart Island’s electricity to be primarily generated by renewable energy, providing residents with a reliable, affordable solution while also fostering economic opportunities in tourism and aquaculture.

“Council will be submitting a proposal to the Regional Infrastructure Fund for the funding of this project very soon as it will be impossible for 400 residents to cover the capital costs. This is a one-off investment that will give new life to the island and secure a strong future for the islanders," said Mr Scott.

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With strong community support and government backing, the Council is optimistic about delivering this long-awaited project.

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