Skip to main content

A major infrastructure project supporting decarbonisation in WA.

In line with the WA State Government’s decarbonisation strategy to be delivered by 2030, our Collie Battery Energy Storage System (CBESS) Project forms part of Synergy's decarbonisation strategy.

Coal-fired power generation is being replaced with renewable energy generation infrastructure and energy storage solutions.

CBESS is expected to deliver 64% of the new energy storage capacity announced as part of this plan. 


CBESS is located in the town of Collie, just over 200km south-east of Perth, next to the Collie Power Station on Boys Home Road. The previously cleared, Synergy-owned site is being repurposed for this project.

The site is approximately 2.5 km south west of the Western Power owned 330 kV Schotts Terminal and, once constructed, the CBESS will connect to this terminal.


Layout and size

Battery energy storage systems (BESS) can absorb excess energy generated by rooftop solar PV systems when the sun is shining and discharge when demand for electricity peaks usually in the evening. 

CBESS will be Synergy’s third BESS and one of the biggest in the world, providing around 500 Megawatts (MW) or 2000 Megawatt hours (MWh) of power when fully charged.

CBESS will use 640 container batteries, similar to those used on Synergy's other battery projects in Kwinana; KBESS1 and KBESS2. The batteries will cover approximately 40,000sqm which is about two full sized football ovals or 10 times the size of KBESS1.


Key project dates

May 2023 Project announced and community consultation began
December 2023 Development application approved 
February 2024 Earth works commenced 
May 2024 Construction and installation begins
2025 Project completion  



We're here to help

If you have questions about this project which aren’t answered here, please email us and someone from our team will be in touch.

Email the team

Explore SynergyRED Projects

Learn more about our renewable energy projects

Kwinana Battery Energy Storage System 1

Battery storage solutions are designed to store and distribute energy and can help support the security and reliability of the electricity system. Learn about our Kwinana Battery Energy Storage System 1 which was commissioned in 2023, a first for WA.

Find out more

Kings Rocks Wind Farm

Along with battery storage solutions, expanding and building wind farms across WA is an important part of transforming the State's energy future. Discover how we’re harnessing the power of the wind with King Rocks Wind Farm.

Find out more