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Project overview
  • Lead Organisation



    Wallgrove, New South Wales

    ARENA Program

    Advancing Renewables Program

  • Start date

    2 October 2020

    End date

    17 April 2024

  • Project Partners
    Tesla Motors Australia, Infigen Energy


The TransGrid Wallgrove Battery will build, test and operate a 50 MW / 75 MWh lithium-ion battery at the Wallgrove substation in western Sydney. The project will use Tesla batteries and demonstrate its innovative synthetic inertia product known as “Virtual Machine Mode”. TransGrid has entered into an agreement with Infigen for use of the 50MW / 75MWh battery for market services.


As part of the TransGrid Wallgrove Battery project, TransGrid has identified a likely inertia shortfall for NSW during the period 2023-24 to 2027-28, due to the expected closure of Liddell and Vales Point power stations. TransGrid is responsible for resolving these inertia shortfalls in NSW and will use the project to demonstrate the ability of battery technology with synthetic inertia and fast frequency response capability to provide inertia services.


The TransGrid Wallgrove Battery project will be equipped with synthetic inertia and fast frequency response capabilities. TransGrid will also complete modelling and monitoring of the project’s response during grid disturbances to better understand the technology’s capability and its impact on the NSW power system.


The key objective is to demonstrate the technical capability of batteries with advanced inverter capabilities to replace traditional inertia and, in doing so, demonstrate that batteries can provide the most cost effective solution for NSW’s upcoming inertia shortfall.

Last updated 03 February 2023


Funding announced for NSW’s big battery

TransGrid will build NSW’s first grid-connected large-battery in a bid to prove batteries are the most effective way to provide inertia as the energy transition advances.

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