Tesla Megapack Powers Two Record-Breaking Australian Battery Projects

Australia just closed out 2025 with a record-breaking quarter for grid-scale battery storage — and Tesla Megapack was at the centre of it. Tesla Australia & New Zealand highlighted two massive deployments in the Clean Energy Council's latest Quarterly Investment Report, and the numbers are genuinely staggering.

Together, these two projects represent nearly 2 GWh of new storage capacity added to Australia's National Electricity Market — a figure that would have seemed implausible just a few years ago. Here's a close look at each one.

📊 Key Figures

Metric	Elaine BESS	Melbourne MREH
Power Capacity	311 MW	600 MW
Energy Capacity	1,244 MWh	1,600 MWh
Location	SW Victoria	Plumpton, Melbourne West
Status	Under Construction	Operational (Dec 2025)
Tesla Megapacks	TBC	444 units
Project Cost	A$460M finance facility	AUD 1.1 billion
Developer	Akaysha Energy	Equis + State Electricity Commission (VIC)

Project 1: Akaysha Energy's Elaine BESS — A Financial Close Milestone

The Elaine Battery Energy Storage System, located approximately 100 kilometres west of Melbourne in southwest Victoria, earned a notable distinction in the Clean Energy Council's report: it was the largest storage project to reach financial close in Q4 2025. That's not a construction milestone — it's a financing one, and it matters enormously in the world of infrastructure development.

Akaysha Energy secured a A$460 million project finance facility, including A$75 million in letters of credit, to fund construction. The deal is underpinned by a 15-year Virtual Tolling Agreement with Snowy Hydro — one of Australia's largest energy companies — which provides long-term revenue certainty that made the financing package possible. Construction kicked off in October 2025, with Tesla partnering alongside Consolidated Power Projects to deliver the BESS hardware and integration.

At 311 MW / 1,244 MWh, Elaine will be a major grid stabilisation asset for Victoria's electricity network once complete. Projects of this scale are critical for absorbing excess renewable generation during peak solar hours and dispatching stored energy during evening demand peaks — exactly the use case Tesla Megapack was engineered for.

Project 2: Melbourne Renewable Energy Hub — Already Online and Rewriting Records

If Elaine is the project to watch, the Melbourne Renewable Energy Hub (MREH) is the one already delivering. Located at Plumpton in Melbourne's west, the MREH completed commissioning and entered commercial operations in December 2025 — making it one of the largest operational battery storage facilities in the southern hemisphere.

The numbers are extraordinary: 444 Tesla Megapack units, 600 MW of power capacity, and 1,600 MWh of energy storage — all connected to Australia's National Electricity Market via a world-first underground 500 kV cable and three Toshiba 500 kV transformers. That transmission infrastructure alone is a major engineering achievement.

The project is co-owned by Singapore-based clean energy investor Equis and the Victoria government-owned State Electricity Commission (SEC), with a total project cost of AUD 1.1 billion. The SEC's stake was valued at AUD 245 million — a significant public investment in grid-scale storage that reflects how seriously Australian governments are taking energy transition infrastructure.

The MREH's December 2025 commissioning contributed directly to the Clean Energy Council's headline stat: utility-scale batteries added a record 1 GW / 2.3 GWh of new capacity across Australia in Q4 2025 alone.

🔭 The BASENOR Take

Tesla Energy doesn't get nearly enough attention relative to the vehicle business, but these two projects illustrate why it's increasingly central to Tesla's long-term story. The Megapack isn't just a product — it's becoming essential infrastructure for countries trying to decarbonise their electricity grids at speed.

Australia is a particularly important market for this. The country has one of the world's highest rates of rooftop solar penetration, which creates extreme midday generation surpluses and steep evening demand ramps — exactly the conditions that make large-scale battery storage economically essential, not just environmentally desirable. Tesla's ability to win both the Elaine and MREH contracts signals that Megapack is competitive on price, delivery timelines, and technical capability at the gigawatt-hour scale.

The MREH's 444-unit Megapack deployment is also a manufacturing story. Producing and delivering hundreds of these units to a single site requires serious supply chain execution — and the fact that it commissioned on schedule in December 2025 suggests Tesla's Megapack production ramp at Lathrop, California is tracking well. For Tesla Energy investors and observers, that operational reliability matters as much as the headline capacity numbers.

Watch for Elaine's construction progress through 2026. When it comes online, Victoria will have added nearly 3 GWh of Megapack-based storage in a remarkably short window — a genuine infrastructure transformation that few would have predicted even three years ago.

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Sources verified at publish time. Spotted an inaccuracy? Email editorial@basenor.com.