Tesla’s utility-grade Megapack batteries are once again at the center of a major energy storage initiative — this time in Western Australia. Atmos Renewables has announced financial close for the Merredin Battery Energy Storage System (BESS), a 100 MW / 400 MWh project set to be powered by Tesla’s Megapack systems with grid-forming inverter technology (via pv magazine Australia).
The $145 million USD ($220 million AUD) battery project is being developed in partnership with Nomad Energy and will be constructed just southwest of the Merredin Solar Farm in Western Australia’s Wheatbelt region. It is strategically situated along the 220 kV Muja–Kalgoorlie transmission line, connecting to the South West Interconnected System (SWIS) through the nearby Merredin Terminal Station.
“The Merredin BESS exemplifies our commitment to delivering reliable, clean energy solutions tailored to the needs of Western Australians,” said Atmos CEO Nigel Baker, adding that the project will also support WA’s renewable energy targets while strengthening grid resilience.
Construction is expected to begin soon, with completion scheduled for early 2027. The project will generate approximately 70 construction jobs and marks Atmos’ first-ever battery facility and its 18th operational asset overall.
Atmos and Nomad plan to develop a pipeline of renewable energy projects totaling over 1 GW in Western Australia by 2030. Baker emphasized that community involvement remains a top priority: “Atmos is dedicated to partnering with local communities and suppliers to ensure the long-term success and positive legacy for all our projects.”
The Merredin BESS is the latest sign of Tesla’s growing dominance in global energy storage. It follows the successful activation of the Collie Battery Stage 1 project in October 2024, also in Western Australia, and last month’s announcement that Tesla Megapacks will power China’s largest grid-scale battery plant.
Tesla deployed a whopping 9.6 GWh worth of energy storage products globally during Q2 2025, the company’s best second quarter yet for the segment. With Tesla’s Megapacks increasingly being tapped for some of the world’s most ambitious battery projects, the Merredin BESS stands as yet another milestone in the company’s expanding energy footprint.
