Kwinana Battery Energy Storage System Stage 2

Planning WA's energy future

Kwinana Battery Energy Storage System Stage 2 (KBESS2) is Synergy's second lithium-iron, large scale battery energy storage system in the SWIS.

This project is crucial to support the closure of our coal-fired power stations, in line with the State Government’s announced retirement schedule to achieve its 2030 emissions reduction targets. Large scale battery energy storage systems support ongoing uptake in rooftop solar panels and the construction of additional large-scale renewable generation assets such as wind and solar farms.

Location

• The KBESS2 battery is next to KBESS1 at the existing Kwinana Power Station site, which was successfully decommissioned in September 2023.
• The site is within the suburb of Naval Base on the Swan Coastal Plain, situated approximately 30km southwest of Perth’s central business district, 17km south of Fremantle and 5.5 kilometres northwest of the Kwinana town centre.
• The site is within one of WA’s most important industrial areas. The land is comprised within the local government areas of Cockburn, Kwinana and Rockingham, within the Kwinana Strategic Industrial Area.
• KBESS2 is connected to the 330kV Western Power transmission system via the existing substation which was constructed 500m from the KBESS1 facility.

Layout and size

• KBESS2 consists of 8 power groups with 288 battery units across the facility. There are additional areas dedicated for stormwater/firewater runoff management and an operations and maintenance facility.
• KBESS2 is approximately the size of 4 soccer fields. The facility provides 200MW of additional power capacity and 800MWh of additional storage capacity.

Progress

• Construction of KBESS2 is complete.