Limestone Coast BESS
Balance of plant
Project overview
The Limestone Coast BESS is a 250 MW / 500 MWh battery energy storage project supporting grid stability and energy transition in South Australia. GGC was engaged to deliver balance of plant works and HV infrastructure.
Technical Delivery
Scope of work includes comprehensive design and engineering, supply and installation of a 275/33kV substation (including primary plant, SCADA and control systems), and installation of client-supplied battery units and PCS systems.
Key Challenges
- Located in South Australia’s karstic, cave-prone Limestone Coast, the battery site required extensive geotechnical investigations to manage risks of ground instability and subsidence. GGC conducted thorough drilling, scanning and testing to identify voids and ensure stable foundation performance.
- Managing multiple work fronts on a complex, large-scale site required innovative logistics. GGC utilised a Combilift to flexibly mobilise and install large loads, including precast foundations, PCS units, battery units and auxiliary transformers, directly into position.
Solution
GGC applied a structured delivery approach integrating engineering, procurement and construction, ensuring seamless system integration and alignment with grid requirements.
Outcome
The project highlights GGC’s capability to deliver complex BESS infrastructure, supporting grid reliability and enabling large-scale renewable integration.
Client
Pacific Green
Location
Mount Gambier, South Australia
Scope
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BESS balance of plant design and construction
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Civil works, drainage and access roads
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275kV substation construction
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Installation and commissioning of BESS systems
Key Metrics
- Capacity: 250 MW / 500 MWh
- Voltage: 275kV
