Finnish technology group Wärtsilä has announced plans to deliver a major energy storage system in Australia – the company’s second DC-coupled project in the country and the largest of its kind within the National Electricity Market (NEM).
Once operational, the system will have the capacity to power up to 120,000 homes and businesses, supporting Australia’s renewable energy ambitions. The order will be booked by Wärtsilä in Q4 2025, with completion expected in 2028.
DC-coupled systems directly connect solar generation with battery storage via a DC/DC converter, helping to minimise energy losses and capture solar power that would otherwise be curtailed.
This approach improves system efficiency and grid stability, addressing the challenges of increasing solar and wind curtailment across the network.
The project recently secured approval for its Generator Performance Standards (GPS), a key milestone in advancing the design and integration of large-scale renewable generation and storage.
Supported by a 20-year service agreement, the system will utilise Wärtsilä’s optimisation technology to ensure reliable performance.
“This project is significantly larger than our earlier DC-coupled project, underscoring the need for this type of technology in expanding at scale,” said David Hebert, Vice President of Global Sales Management, Wärtsilä Energy Storage.
“DC-coupled technology is a breakthrough for hybrid renewable plants and a critical step towards establishing a financially viable renewable energy future. The project is a prime example of how hybrid renewable energy and storage solutions can help stabilise Australia’s grid while advancing decarbonisation goals.”
Wärtsilä’s GEMS software will manage the integration of the storage system and solar assets, ensuring coordination and optimised energy management.
This project marks Wärtsilä’s ninth battery energy storage system in Australia, expanding its local portfolio to 1.5GW / 5.5GWh of capacity, and contributing to the nation’s target of net zero emissions by 2045.
[Image caption: Stage 1 of the 700 MW / 2810 MWh Eraring battery in New South Wales, Australia, is currently under delivery. Image credit: Wärtsilä]
