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Case study

Neoen expands Hornsdale Power Reserve big battery

SA big battery gets bigger 

The landmark ‘big battery’ in South Australia  Hornsdale Power Reserve – has been expanded by 50 per cent, enhancing grid security and maximising the benefits of renewable energy.The expansion provides an Australian first large-scale demonstration of the potential for battery storage to provide grid stabilising inertia services that are critical to the increasing integration of renewable energy.  

150 MW



energy savings


CEFC commitment

With this expansion and the commencement of grid-scale inertia testing, Neoen continues to lead the way in battery storage innovation and reinforces its contribution and commitment to South Australia’s 100 per cent renewable energy target.
Louis de Sambucy
Managing Director, Neoen Australia

Our investment

The CEFC, working alongside Neoen, ARENA and the South Australian Government, committed up to $50 million in project finance for the expansion in 2019. The investment was the first CEFC commitment to a grid-scale standalone battery.

our impact

Independent reviews, conducted by consulting engineers Aurecon, indicate that the Hornsdale Power Reserve (HPR) delivered more than $150 million in savings to South Australian energy consumers in its first two years of operation.

The increased storage capacity of HPR further enhances its ability to stabilise the grid, limiting price volatility in the market and reducing the risk of blackouts. In a world first, Neoen and Tesla are testing the battery’s capacity to deliver grid-scale inertia services, an essential component of grid stability.

In July 2020, IJGlobal announced that the HPR expansion financing won the Asia Pacific Energy Storage Deal of the Year. The IJGlobal Awards celebrate the best-in-class transactions and organisations across the international infrastructure and energy sectors.


The Hornsdale Power Reserve, the largest battery in the Southern Hemisphere

Last updated 19 November 2019. South Australia, Storage, Renewable energy