Final Transformer Arrives at SEC’s Massive Battery Project

The State Electricity Commission’s (SEC) Melbourne Renewable Energy Hub (MREH) is moving closer to reality with the arrival of the third and final transformer for the project's 600MW battery. Following the delivery of the first two transformers in January 2025, the project remains on schedule for operations to begin in late 2025.

Transformers are a critical part of any renewable project. At MREH, they will ensure efficient energy flow to and from the transmission network, helping maximize grid performance and reduce transmission losses. Once fully connected, these three transformers will support the delivery of up to 1.6GWh of energy storage—enough to power around 200,000 homes during peak demand periods.

The MREH battery system is made up of three sections:

A1 and A2: Each includes 110 battery units (200MW/400MWh), powering around 66,000 homes for two hours.

A3: Contains 224 battery units (200MW/800MWh), powering around 66,000 homes for four hours.

Once complete, the site will offer up to 1200MW of charge/discharge capacity, with future expansion approved for up to 2.4GWh of energy storage.

Co-owned by the SEC and Equis Australia, MREH is designed with cutting-edge inverter technology to bolster voltage and frequency stability in the transmission network. As ageing coal-fired plants retire, MREH will help replace lost system inertia, ensuring a stronger and more reliable energy future for Victoria.

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