One of Queensland’s largest battery projects is approaching the construction halfway mark with the final Tesla Megapack units now delivered and installed onsite.

324 Megapacks, each weighing 38 tonnes and eight metres in length have each been transported by truck from the Port of Brisbane and installed at the Stanwell Power Station site near Rockhampton.

Together, the units make up the 300 MW with up to four-hour duration (1200MWh) battery and forms a key part of Stanwell’s broader 2.8 GWh battery firming portfolio.

Stanwell CEO Michael O’Rourke said big battery projects like the Stanwell Battery were essential for the future of Queensland’s energy system as it continues to diversify.

“By investing in large-scale storage projects, we’re creating a more resilient energy system and positioning ourselves to meet the needs of customers and the National Electricity Market for decades to come,” Mr O’Rourke said.

“Batteries provide reliable, dispatchable energy and are needed as our energy system diversifies. They are critical for us to be able to continue to provide affordable, reliable and sustainable energy for Queensland, our customers and the National Electricity Market.

“Batteries work by storing excess energy during periods of high generation and releases it when demand peaks or generation dips. Their ability to rapidly respond when needed will help stabilise the grid in real time.

“The Stanwell Battery complements our existing generation assets and is a key step in maximising the value of our sites and leveraging our skilled workforce and strong network connections to deliver future-ready energy solutions.”

Stanwell General Manager Central Generation, Angie Zahra said the arrival and installation of the final Megapack at the Stanwell Battery site was a proud moment for the project team.

“Over the past three months, 324 of these megapack units have been transported to site which is quite the logistical feat,” Ms Zahra said.

“There’s been a hive of activity on site with the project bringing real benefits to the local community.

“It was due to create around 80 jobs, but at its peak, up to 115 people have been working on-site, including many from the region. It’s created jobs and supported local businesses – a great example of how important infrastructure projects can benefit regional communities.

“The battery’s presence here at Stanwell Power Station reinforces our role as a key contributor to Queensland’s energy future.”

With robust fire safety measures, advanced monitoring, and substantial buffer zones, energy storage systems like the Stanwell Battery are one of the safest kind of large scale batteries.

Now that all the Megapacks are in place, work is underway to connect them to medium-voltage transformers, laying high-voltage underground conduits and feeder cables, and preparing for the arrival of the second switch room.

Construction of Stanwell Battery started in 2024 and is scheduled to commence operation in May 2027.