South Australia’s Big Battery

Clean energy for SA

Sharing Benefits

Making a difference in local communities


The Hornsdale Power Reserve is the world’s first big battery. It provides essential grid-support services.

The first 100MW/129MWh was completed in November 2017. In its first two years of operation the Hornsdale Power Reserve confirmed the benefits associated with grid-scale batteries in the National Electricity Market and saved South Australian consumers over $150 million.

Following this success, a 50MW/64.5MWh expansion was completed in September 2020. As part of the expansion the full 150MW is being upgraded to include Tesla’s Virtual Machine Mode, enabling the battery to provide inertia support services to the electricity grid.


Battery storage allows us to store the energy and provide it to the grid whenever it’s needed.


The Hornsdale Power Reserve is located in a strong part of South Australia’s electricity transmission network approximately 15km north of Jamestown, about 3 hour’s drive from Adelaide.

The project is co-located with Hornsdale Wind Farm



Providing full time jobs plus ongoing opportunities for local businesses

For the consumer

Reducing South Australia’s energy costs by more than $150 million in the first two years.

For your community

Up to $60,000 per year
funding for local community initiatives and projects



What Does a Big Battery Do?

What Does a Big Battery Do?

Ever wondered what a big battery does? Neoen and AusNet have made a wonderful animation that explores the many abilities of a grid-scale or big battery and the role they play in supporting the clean energy transition.

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The Learning Hub Launch

The Learning Hub Launch

We have recently developed the Learning Hub, an educational resource for local schools, as part of our community engagement. The Learning Hub is a stand-alone website with materials for Years 5-6 and another for Years 7-8, both centered around electricity and...

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IMPORTANT: Due to the current Covid-19 restrictions and fast changing nature of this pandemic, Neoen have made the difficult decision to postpone the Hornsdale Power Reserve Open Day. We will continue to monitor the situation and reschedule the event at a suitable...

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This graph with live data indicates how much power the battery has charged (left axis, blue bars) and discharged (left axis, pink bars) in the past 48 hours as well as the electricity price (right axis, black line).

Neoen produce affordable reliable electricity from natural renewable sources such as the sun and wind.

With 12 years’ experience behind us, our technologies are tried, tested and proven. Our South Australian Big Battery has been keeping the lights on in SA since 2017, and saved consumers over $116 million in 2019 alone !

We own and operate all of the projects we build (rather than developing them to be sold) and as long-term neighbours we are committed to sharing the benefits with surrounding communities.

This dedication to community and environment has made us a renewable energy developer of choice across Australia.