For years, the easy way to dismiss a grid-scale battery was to call it a science project. Something a government bankrolls to look busy on climate, dropped in a paddock somewhere, quietly losing money while the press release brags about “powering X thousand homes.” That story is getting harder to tell with a straight face. A little over a week ago, a wall of 448 Tesla Megapacks sitting in central-west New South Wales switched on at full power and became the third-largest battery on Australia’s main grid. The hardware is genuinely impressive. The part worth your attention is the money behind it: the company that built the thing is reportedly valued north of a billion dollars, and as of this week, its owner, the asset-management giant BlackRock, is still reportedly weighing whether to sell a piece of the company behind it.<\/p>\n
The battery is called Orana, and it sits roughly two kilometers (about 1.2 miles) northeast of the town of Wellington, inside what Australia calls the Central-West Orana Renewable Energy Zone. According to Energy-Storage.News<\/a>, it officially reached full output on May 29, with grid data showing it now operating in the National Electricity Market, the interconnected grid that covers Australia’s populous east coast.<\/p>\n A battery’s two headline numbers are power and energy, and people mix them up constantly. Orana is rated at 415 megawatts of power and 1,660 megawatt-hours of energy. Divide the energy by the power and you get the duration: four hours at full output. That makes it a heavy hitter, though not one of the new “long-duration” eight- and ten-hour batteries Australia is also starting to build. By stored energy, Orana now ranks third on the grid, behind Origin’s 1,770 MWh Eraring Battery and Akaysha’s own 1,680 MWh Waratah Super Battery.<\/p>\n It’s also, quietly, a Tesla story. Those 448 Megapacks are the same utility-scale boxes Tesla has been shipping to grid projects from Texas to Utah<\/a>, and they’re the building block behind a lot of the world’s biggest batteries right now. The balance-of-plant work was handled by Consolidated Power Projects Australia, the site plugs into a nearby TransGrid 330-kilovolt substation, and the build was backed by AU$650 million (about US$466 million) in debt from a syndicate of 11 banks, including ANZ, Commonwealth Bank and Westpac. A retailer called EnergyAustralia locked up 200 megawatts of the battery’s output under a 12-year “virtual tolling” deal, essentially renting the right to charge and discharge a chunk of it to manage its own customers’ demand.<\/p>\n Here’s the line that should make a few utilities jealous. Back in 2024, when Orana’s developer, Akaysha Energy, closed that financing, it said the battery would be operating by the second quarter of 2026. Renew Economy reported at the time that the market operator was skeptical, figuring the project might slip the deadline by six months. Orana hit full output on May 29, inside that Q2 window, more or less on the schedule it set itself two years earlier.<\/p>\n That’s not nothing in a country where big infrastructure routinely runs late, and it isn’t a one-off for Akaysha. Earlier this year the company brought its 205 MW \/ 410 MWh Brendale battery in Queensland online close to five months ahead of schedule<\/a>, using the same Tesla Megapack hardware. So the Wellington result fits a pattern rather than a fluke.<\/p>\n One thing the celebratory write-ups skate past, though: “on time” here means Akaysha’s own 2026 target, not the original political timeline. The whole Australian storage push was meant to backfill retiring coal faster than it’s actually happening. But on the narrow question of whether this specific battery did what its builder promised, when its builder promised it, the answer is yes.<\/p>\n This is where it stops being an engineering story. BlackRock bought Akaysha back in 2022, when the company was a near-unknown that had yet to finish a single battery. Today Akaysha runs about 1.4 gigawatt-hours of operating storage in Australia, has another 4.5 GWh under construction, and claims roughly 30 GWh in development worldwide, including projects in the US, Japan and Germany.<\/p>\n As of this week, Energy-Storage.News<\/a> still frames BlackRock as reportedly considering a partial exit from the business. The hard numbers behind that talk come from earlier in the year: back in January, Bloomberg<\/a> reported that Akaysha was weighing options to raise money, including selling a significant minority stake, with the company valued at more than a billion dollars. That reporting was deliberately cautious: talks were at an early stage, a deal might not happen at all, and BlackRock declined to comment. Nothing more concrete has surfaced publicly since, so treat the specifics as a January snapshot rather than a done deal. Either way, what’s reportedly on the table is a slice of the company that owns the batteries, not the batteries themselves.<\/p>\n Why would a piece of Akaysha be attractive? Because Orana is exactly the kind of asset big investors call “de-risked.” It holds a government-backed Long-Term Energy Service Agreement under New South Wales’ Electricity Infrastructure Roadmap, a 12-year contract with EnergyAustralia, and revenue swaps and tolling deals across the rest of the portfolio with names like Snowy Hydro and commodities house Gunvor. Translated out of finance-speak: a lot of the cash flow is contracted years in advance, which is precisely what pension funds and infrastructure buyers pay up for. A battery running on raw merchant price swings is a gamble. A battery with a decade of signed contracts is closer to a bond that happens to store electrons.<\/p>\n Step back and Orana is one data point in something genuinely strange. Australia, a country of 27 million people, is now the third-largest utility-scale battery market on the planet, behind only China and the United States. The Clean Energy Council’s Clean Energy Australia 2026 report<\/a> found the country added a record 2 gigawatts of big-battery capacity in 2025 alone, a 233% jump over the year before.<\/p>\n The pipeline is the wild part. As of the first quarter of 2026, the market operator counted 67.3 gigawatts<\/a> of generation and storage moving through the grid-connection process, up 33% in a year, with batteries making up close to half of it. That’s being driven by a hard deadline: Australia expects to retire around 11 gigawatts of mostly coal-fired power over the next decade, while electricity demand is forecast to climb 28% by 2035. Something has to cover the gap when the coal plants switch off and the sun goes down.<\/p>\n That “something” is increasingly a giant battery acting as a shock absorber. Akaysha’s flagship Waratah Super Battery, the second-biggest on the grid, was built specifically to let more renewable power flow on existing transmission lines as the 2.8-gigawatt Eraring coal station winds down. (Eraring got a two-year reprieve from the state government, so the urgency loosened, but the design logic stands.) It’s the same pattern that’s been running since Tesla and Neoen flipped on the original “world’s largest battery” at Hornsdale in 2017, and it’s a big part of why Australia keeps showing up as the test bed for whatever grid storage does next. If you want the longer arc of how the country got here, we’ve traced Australia’s renewable build-out before<\/a>.<\/p>\n The grid-scale numbers grab the headlines, but the most telling figure might be a smaller one. After Australia launched its Cheaper Home Batteries Program on July 1, 2025, offering a roughly 30% federal discount on home storage, households installed more than 200,000 batteries in the first six months<\/a>, according to the country’s climate and energy minister, Chris Bowen. The install rate jumped from a few hundred a day to over 1,500. Bowen said the milestone meant more Australians were “taking control of their power bills.”<\/p>\n That wave added about 4.7 gigawatt-hours of storage and, per the government, doubled the nation’s total battery capacity in half a year. Tesla’s Powerwall 3 is one of the eligible systems, which is part of why the home-battery story and the Megapack story keep bleeding into each other: same company, very different boxes, same grid. We’ve dug into what a Powerwall actually does for a household and the grid<\/a> if you want the consumer end of this. The program has since been expanded to a 7.2 billion dollar budget, aiming for 2 million home batteries by 2030.<\/p>\n None of this means grid batteries have stopped being subsidized, or that every project pencils out. Plenty don’t. But the tell that a technology has graduated from science fair to industry isn’t the ribbon-cutting \u2014 it’s the data room. When a battery’s most newsworthy feature is which investor ends up owning it, the argument about whether the thing is a real business is pretty much settled. Orana will spend the next decade quietly arbitraging power prices and firming the grid around Wellington. The interesting fight now is over who gets to collect the check.<\/p>\n","protected":false},"excerpt":{"rendered":" For years, the easy way to dismiss a grid-scale battery was to call it a science project. Something a government … <\/p>\nIt landed when Akaysha said it would<\/h2>\n
Why BlackRock is reportedly weighing a sale<\/h2>\n
Australia turned itself into the world’s battery lab<\/h2>\n
The same boom is happening in people’s garages<\/h2>\n
What the data room really tells you<\/h2>\n