Origin Energy has taken yet another step forward in the delivery of the large-scale battery at Mortlake Power Station, with two purpose-built 200t transformers arriving on-site.
Each transformer, measuring around 9m long and 2.5m wide, can handle up to 180MVA of electrical load. When installed within the Mortlake Terminal Station, they will play a crucial role in converting the battery’s stored energy to a higher voltage, allowing it to be efficiently transmitted into the electricity network.
Transporting the transformers was a significant logistical effort carried out over two weeks, with the first unit delivered to site on 29 July and the second arriving two days later.
Origin Project Director, Paul Farnworth, said that the delivery of these massive components marked an important milestone for the project.
“The160km journey from the Port of Geelong to Mortlake Power Station required a 16-axle platform trailer to support the heavy load. Three prime movers – one pulling from the front and two push trucks at the rear – ensured a safe and controlled move,” he said.
“On arrival they were positioned onto their designated concrete pads within the switchyard, which is being extended as part of broader upgrades to accommodate Origin’s new battery energy storage system.”
The Mortlake battery will have a capacity of 300MW and be capable of running at full capacity for around two hours, helping to firm variable renewables supply and maintain reliable power for customers.
The large-scale battery project will support further renewable development by charging during the day when energy sources from wind and solar generation are plentiful, then discharging into the grid during peak demand periods.
“Both purpose-built transformers will compliment 62 smaller transformers, 1044 battery enclosures and 116 inverters, collectively managing the charging and discharging processes,” Mr Farnworth said.
“We continue to target commercial operations for the Mortlake battery late in 2026.”
