Battery energy storage deployment in Australia’s National Electricity Market (NEM) is rapidly accelerating.

As the system transitions away from coal and the demand for energy storage increases, the delivery of battery energy storage systems will be critical to maintaining system reliability and supporting renewable generation.

This article provides an update on battery energy storage deployment in the NEM, highlighting newly commissioned assets, trends in system size and duration, and what this means for our forecast through to the end of 2028.

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​Find last quarters report here.

Executive summary

• Battery deployment continues to set records. 750 MW and 1,500 MWh of new battery energy storage commenced operation in Q3 2025. This is the second consecutive quarter of record deployment.
• Waratah Super Battery Stage 1 became commercially available after 11 months of commissioning, making it the largest battery in the NEM.
• Shift toward larger and longer-duration systems: All newly commissioned batteries exceeded 100 MW and had a 2-hour duration.
• The battery fleet is now projected to reach 17.9 GW by the end of 2028. This is down from 18.4 GW last quarter after several projects were removed from the pipeline.

Please message the author at marcus@modoenergy.com with any questions and comments.

NEM grid-scale battery energy storage capacity reaches 3.4 GW and 6 GWh in Q3 2025

In Q3 2025, a record 750 MW and 1,500 MWh of grid-scale battery capacity began commercial operation in the NEM. This marks the second consecutive quarter of record deployment, surpassing last quarter’s previous high of 585 MW.