1,200MWh solar-plus-storage project in New South Wales, Australia, seeks approval

LinkedIn
Twitter
Reddit
Facebook
Email
Acen Australia owns a number of solar PV projects in NSW, such as the 936MWdc New England solar project (above). Image: ACEN Australia.

Renewable energy developer Acen Australia has submitted assessment documents for its 600MW Birriwa solar-plus-storage in New South Wales (NSW), Australia, which will incorporate a co-located 600MW/1,200MWh battery energy storage system (BESS).

The project developer is seeking approval via the Federal government’s Environment Protection and Biodiversity Conservation Act (EPBC).

The project is set to be developed on an area of approximately 1,200 hectares consisting of mostly cleared grazing land, about 20km southeast of Dunedoo, in the NSW Central-West Orana region, the location of one of the Renewable Energy Zones (REZ) being developed in the state. The REZ recently transitioned into the delivery phase, as reported by our sister site PV Tech.

Acen Australia said the BESS will enable excess electricity generated by the PV facilities to be captured and released during periods of high demand. The system will also provide grid stability services and backup capacity to ensure the security of supply.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

According to documents observed on the EPBC website, the project will look to install approximately one million solar PV modules and associated mounting infrastructure. The site will also include an on-site substation with a connection voltage of up to 500kV.

Construction of the project, which will have an average workforce of 360 throughout the development phase, will last 28 months, with the construction of the BESS expected to take around 16 months. Throughout operations, a workforce of up to 20 people will be required.

It is worth noting that the Birriwa solar-plus-storage project will be located next to two other solar projects developed by Acen Australia, as seen in the image above. These are the 400MW Stubbo solar PV project, at which construction began in November 2022, and the 320MW Narragamba solar project. These projects will connect to new transmission infrastructure developed by the Energy Corporation of NSW (EnergyCo) as part of the Central-West Orana REZ.

Once the Birriwa solar project receives approval, it will be able to transition into the construction phase. It will connect to the Merotherie Energy Hub and the transmission line proposed by EnergyCo NSW.

This article first appeared on our sister site PV Tech.

8 September 2026
Barcelona, Spain
Battery & Energy Storage Tech Europe (BESTE) is Europe’s industrial scaling platform for stationary and industrial battery applications — not EVs. Taking place 8–9 September 2026 at Fira de Barcelona, BESTE brings together utilities, IPPs, energy-intensive industries, data centres, ports, rail, maritime, defence and aerospace OEMs — all deploying or integrating battery storage at scale. Over 100 companies already confirmed — including EDP Renewables, Acciona, Endesa, Naturgy, Neoen, Galp, Basquevolt and Veolia — alongside 40+ expert speakers and international institutional support from BEPA, BVES, LDES and Volta Foundation. Where Europe’s battery & ES ecosystem turns projects into reality.
15 September 2026
San Diego, USA
You can expect to meet and network with all the key industry players again in 2025 from major US asset owners, operators, RTOs and ISOs, optimizers, software and analytics providers, technical consultancies, O&M technology providers and more.

Read Next

July 1, 2026
Independent power producer (IPP) Grenergy has signed a 1TWh night-time power purchase agreement (PPA) for its 3.5GWh Elena BESS project in Chile.
July 1, 2026
Wärtsilä has brought the 150MW/300MWh Bungama BESS online in South Australia, for owner and operator Revera Energy.
July 1, 2026
Samsung C&T Renewable Energy Australia has submitted the 600MWh Comet Park BESS for federal environmental assessment under the EPBC Act.
July 1, 2026
Australian AI infrastructure developer Firmus Technologies has signed a 12-year wholesale energy supply agreement with Gunvor Group, including 1.5GWh of battery storage by 2032.
June 30, 2026
Spanish utility Iberdrola’s subsidiary Avangrid has announced plans to construct a 41MW/82MWh BESS facility in Gilliam County, Oregon.