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Project overview
  • Lead Organisation

    Edify Energy


    Gannawarra, Victoria

    ARENA Program

    Advancing Renewables Program

  • Start date

    13 January 2018

    End date

    30 June 2022

  • Project Partners
    Victorian Government
    This battery project was completed on 30 January 2022.


The Gannawarra Energy Storage System (GESS) is a 25 megawatt (MW)/50 megawatt-hour (MWh) lithium-ion battery to be co-located with the 60 MW(DC) Gannawarra Solar Farm located west of Kerang in north western Victoria.

It is being developed and financed by Edify Energy in a consortium with Wirsol Energy as co-investors, Tesla as battery provider, RCR Tomlinson as EPC contractor, EnergyAustralia as long-term operator, and ARENA and the Victorian Government as providers of grant funding.

How the project works

This Gannawarra Energy Storage System project will demonstrate how an existing solar farm can be retrofitted with battery storage. The battery will store energy at times of relatively low value. The battery will use stored energy and use it at times of relatively high value. The project will also examine providing other grid services such as frequency control ancillary services (FCAS) and, should it be established under the electricity market rules, a Fast Frequency Response (FFR).

Area of innovation

When complete, GESS will be:

  • The first integrated renewables and battery system in Victoria and among the first in Australia;
  • The first retrofit of a battery to an existing or under-construction solar farm; and
  • Among the largest integrated renewables and battery systems in the world.


The battery will help demonstrate how large-scale batteries can provide different benefits to the electricity system, including improving grid stability and power quality, and how they can help integrate more variable renewable energy into the grid. For example, the battery could assist by reducing curtailment of future renewable energy generation on what is a relatively constrained line in the Victorian electricity system hence supporting higher levels of renewables in the region by reducing or controlling peak loading on these circuits.


ARENA and the Victorian Government will jointly provide $25 million in funding for both this project and the Ballarat Energy Storage System (BESS).

Last updated 11 November 2022


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