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White elephant? Hardly—Snowy 2.0 will last 150 years and work with batteries to push out gas

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White elephant? Hardly—Snowy 2.0 will last 150 years and work with batteries to push out gas


In seven years, batteries have taken the lion’s share of grid stabilisation services in Australia. This graph compares market share by technology type between the first quarter of 2018 and 2025. Credit: AEMO

When Snowy 2.0 is in the news, it’s usually about money. The cost of the huge project has gone well beyond the initial A$6 billion estimate and will now cost more than $12 billion.

But cost overruns don’t affect the real value of this pumped hydro project. When it comes online—likely in 2028—Snowy 2.0 will bring something fundamentally new to the Australian electricity system: energy storage at a scale far beyond anything else.

It will have five times more storage than all of Australia’s other pumped hydro and batteries combined, its capital cost is five times lower than batteries per unit of energy storage, and its lifetime is ten times longer than batteries. Our calculations show Snowy 2.0 will cost about one cent per day per Australian over its 150-year lifetime, assuming the final cost is between $15 billion and $18 billion.

Australia is aiming to have 82% of its electricity supplied by solar, wind and hydro in five years’ time, while coal generation declines rapidly. Storing variable renewable energy for later use will keep reliable.

That’s where Snowy 2.0 and other planned large pumped hydro projects come in. Coupled with grid-scale batteries, these energy storage methods will allow us to wean ourselves off gas power.

How will Snowy 2.0 work?

Snowy 2.0 is an expansion of the original postwar Snowy Hydro Scheme. It links two existing reservoirs with a 27-kilometer tunnel and underground hydropower station. When power is cheap, water will be pumped uphill to the top reservoir. When power is expensive, water will run back downhill through the hydro station to produce electricity.

The project will be able to store 350 gigawatt-hours of energy—the equivalent of 7 million electric vehicle batteries, or 350 large grid batteries.

There has been skepticism over whether Snowy 2.0 will be able to perform as intended due to constraints in how much water can be moved around the system.

In fact, the Tumut River system, around which Snowy 2.0 is constructed, has plenty of flexibility, including five interconnected reservoirs with a total capacity 30 times larger than required for Snowy 2.0, and six hydropower stations.

Pumped hydro and batteries solve the energy storage problem

For years, Australia’s grid operators have relied on gas-fired power stations to meet sudden demand. Unlike coal, gas can fire up within minutes. The problem is, gas is no longer cheap, and now generates only 5% of east coast electricity. East coast gas prices have tripled since LNG exports began in 2015, inflating household power bills.

Gas has been a necessary evil to keep the grid reliable. But it’s now possible to begin displacing it using a combination of short-term storage in batteries and long-duration storage in large pumped hydro such as Snowy 2.0.

Batteries and pumped hydro are already replacing gas and coal generators in stabilizing the grid. Energy storage now keeps Australians powered during increasingly common sudden failures of aging coal power stations, or when transmission lines are damaged.

On sunny and windy days, Australia now regularly produces more electricity than it can use. As a result, wholesale electricity prices can become negative. This means energy storage companies are being paid to take and store excess electricity.

It’s hard for coal stations to shut down and restart quickly. As a result, they now scale back as far as possible when prices are low or negative. Their inability to shut off entirely means some cheap, clean wind and solar can’t be used. Coal is still dominant in overnight generation.

Grid batteries do a superb job of discharging stored electricity at to cover regular peak-demand periods in mornings and evenings when isn’t flowing and energy prices are high. These periods are usually brief, meaning the amount of battery energy needed is relatively small.

But batteries are an expensive way to store enough energy to cover electricity demand for longer periods. That’s because very large quantities of battery chemicals and metals are required. At these times, fossil fuel generators make a lot of money as there’s currently no alternative.

This is where large-scale pumped hydro comes in. Snowy 2.0 and other pumped hydro projects can help meet regular morning and evening peak demand and can also provide much of the electricity required overnight. Pumped hydro uses stored water, which is extremely cheap.

Snowy 2.0 is large enough to generate flat-out for a whole week if needed. This means it can do two useful things at once: meet demand from the grid, and help recharge grid batteries when solar and wind are scarce.

Pumped hydro can act as insurance against high prices. A third of Snowy 2.0’s revenue is expected to come from long-term contracts with retailers, renewable generators and large industrial users.

Snowy 2.0 could snatch a substantial portion of the energy market currently occupied by coal and gas. Building several more large pumped hydro systems would make it possible to get rid of coal and gas altogether.

Fewer new transmission lines

Interstate transmission lines are essential. If one state is wet and windless, power can be imported along transmission lines from neighboring states with better weather. But many planned transmission lines have run into issues with rural pushback and slow construction speeds.

Large pumped hydro systems make it possible to avoid building some expensive and politically fraught new transmission lines.

If each state or territory had one large pumped hydro scheme, it would reduce the need for more transmission lines by using low- or negative-cost electricity on sunny and windy days to pump water uphill. This would reduce import requirements.

Australia has 23,000 potential pumped hydro sites, far more than we would ever need. Of these, we have identified 315 as premium sites in Queensland, New South Wales, Victoria and Tasmania. South Australia and Western Australia also have good options, albeit at higher cost.

A good option for is to build pumped hydro in hilly country and grid batteries near cities to reduce grid congestion and avoid the need for more .

For example, Tasmania’s pumped hydro allows the state’s wind energy to be exported to Victoria continuously, maximizing the usage of expensive undersea cables. Used in conjunction with batteries near Melbourne, Tasmanian wind can meet high-value morning and evening peak loads in Victoria.

Big project—but big benefit

When Snowy 2.0 comes online, it won’t be long before it proves its worth. Operating alongside grid batteries, it will help push expensive gas generation out of the grid.

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AMD CEO Lisa Su Isn’t Afraid of the Competition

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AMD CEO Lisa Su Isn’t Afraid of the Competition


Michael Calore: Recording works.

Lauren Goode: Recording. Yeah.

Michael Calore: Yeah. It’s like when people say, let me film that. You’re not actually filming anything. You’re shooting a digital video.

Lauren Goode: So then if you have a video podcast, are you shooting the podcast? What do you say? Do you say taping, then?

Michael Calore: I think you say recording because it just—

Lauren Goode: Recording the pod.

Michael Calore: Yeah.

Lauren Goode: We’re recording the pod.

Michael Calore: It covers all the bases.

Lauren Goode: We’re capturing it.

Michael Calore: That’s what we’re doing.

Lauren Goode: We’re sublimating it. All right. Well, should we record this pod?

Michael Calore: I would like to, yes.

Lauren Goode: Let’s do it.

Michael Calore: Honestly, I’m still recovering from last week’s Big Interview event. My throat is still feeling a little bit raw, even though it’s been like four or five days.

Lauren Goode: You sound delightful to me.

Michael Calore: Thank you.

Lauren Goode: But that really was an epic event.

Michael Calore: It was.

Lauren Goode: Yeah.

Michael Calore: You were on stage.

Lauren Goode: I was. I was first up in the morning. Katie, our boss, gave the intro to the conference and then it was me and Lisa Su, the CEO of AMD. And not only was it a really interesting conversation, but then I was done for the day. I didn’t have to do any more interviews after that. And I just got to listen and absorb, and there were some other really great talks.

Michael Calore: There were, yes. And we’re going to talk through some of them. We’re also going to listen to your conversation with Lisa Su, and then we’ll talk about it, and we’ll take listeners behind the scenes of The Big Interview.



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Why SpaceX Is Finally Gearing Up to Go Public

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Why SpaceX Is Finally Gearing Up to Go Public


SpaceX is planning to raise tens of billions of dollars through an initial public offering next year, multiple outlets have reported, and Ars can confirm. This represents a major change in thinking from the world’s leading space company and its founder, Elon Musk.

The Wall Street Journal and The Information first reported about a possible IPO last Friday, and Bloomberg followed that up on Tuesday evening with a report suggesting the company would target a $1.5 trillion valuation. This would allow SpaceX to raise in excess of $30 billion.

This is an enormous amount of funding. The largest IPO in history occurred in 2019, when the state-owned Saudi Arabian oil company began public trading as Aramco and raised $29 billion. In terms of revenue, Aramco is a top-five company in the world.

Now SpaceX is poised to potentially match or exceed this value. That SpaceX would be attractive to public investors is not a surprise—it’s the world’s dominant space company in launch, space-based communications, and much more. For investors seeking unlimited growth, space is the final frontier.

But why would Musk take SpaceX public now, at a time when the company’s revenues are surging thanks to the growth of the Starlink Internet constellation? The decision is surprising because Musk has, for so long, resisted going public with SpaceX. He has not enjoyed the public scrutiny of Tesla, and feared that shareholder desires for financial return were not consistent with his ultimate goal of settling Mars.

Data Centers

Ars spoke with multiple people familiar with Musk and his thinking to understand why he would want to take SpaceX public.

A significant shift in recent years has been the rise of artificial intelligence, which Musk has been involved in since 2015, when he cofounded OpenAI. He later had a falling out with his cofounders and started his own company, xAI, in 2023. At Tesla, he has been pushing smart-driving technology forward and more recently focused on robotics. Musk sees a convergence of these technologies in the near future, which he believes will profoundly change civilization.

Raising large amounts of money in the next 18 months would allow Musk to have significant capital to deploy at SpaceX as he influences and partakes in this convergence of technology.

How can SpaceX play in this space? In the near term, the company plans to develop a modified version of the Starlink satellite to serve as a foundation for building data centers in space. Musk said as much on the social media network he owns, X, in late October: “SpaceX will be doing this.”



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We Found the Permanent Outdoor Lights Worth Putting on Your Home

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We Found the Permanent Outdoor Lights Worth Putting on Your Home


Weatherproofing. Every model needs a weatherproof rating to survive outside, so if you don’t see one, don’t buy it. There’s usually a lower rating for the control box compared to the rest of the lights, so be sure you can put that somewhere that’s a little less exposed to the elements. (As mentioned above, make sure you have an outdoor outlet, and check if there’s only one on a certain side of your home in case it limits your installation options.)

A range of installation options. You’ll want a set that comes with plenty of options for your own installation, including adhesive and drilled mounting options. What you need will vary based on your home design and materials; e.g., you’ll want adhesive for homes you can’t drill into. WIRED reviewer Kat Merck, who tested a couple different permanent lights, especially liked sets that had holders you screw onto your home that the puck-style permanent lights can slide onto.

Controls for individual lights. This should be a no-brainer, but some cheaper lights won’t give you this ability or have more roadblocks for customized control. Make sure you’ll have easy individual controls, or you might find yourself frustrated with the design results of these lights. It’s similar to design controls that you’d see on smart bulbs and smart string lights.

A great app. This goes hand in hand with the need for individual light control—a good app determines whether that and other features are accessible. Govee and Eufy, two of our favorite permanent outdoor lights we’ve tried, both have good apps that are easy to use and come with preloaded designs. These tech companies make more than just outdoor lights and make other favorite gear of ours, so they’re a good brand to trust to make a usable product and app. We also like Lepro’s more affordable lights, though the app had some extra hoops to jump through to get to controls, while Lumary’s app was a brutal experience for our tester.


Our Favorite Permanent Outdoor Lights

We’ve tested a handful of permanent lights on different homes, and have a few clear favorites. These options are all ones we recommend, provided your home exterior meets the constraints mentioned above.

Govee

Permanent Outdoor Lights Pro

This model from Govee has been one of our top picks in our smart Christmas lights review for a reason, and it’s still one of our favorite models at this price point for everything you’ll get with it. WIRED reviewer Simon Hill tested the 100-foot string that came with six sections, plus an extension code. He used adhesive and screw clips to secure the light pucks and cables, and found installation easy. This is a set that you can cut and splice, but he says that isn’t a task for the faint of heart. It has an IP67 rating, and an IP65 rating for the control box. The busy companion app has everything you could want within it: color controls, tons of Scenes (Govee’s lighting effects), scheduling abilities, and even a music sync option (though that felt a little gimmicky). There’s Matter support, and Govee can connect to Alexa and Google’s ecosystems for voice control. Simon says he’d like these lights to be closer together and the design to be a little more subtle, as you can see the cords pretty easily.

Eufy

Permanent Outdoor Lights S4

WIRED reviewer Kat Merck has tested two different sets of permanent outdoor lights on her home, and Eufy’s S4, incorporating RGB with both warm and cool whites, is by far her favorite. She’s found the app incredibly easy to navigate and find the features she wants, from preset holiday scenes (120!) and colors to schedules and brightness adjustments. There’s even an AI feature that lets you create customized light shows based on moods and scenarios. They were relatively easy to install on her home, which has nonstandard architectural features, as this set has extensions and can be cut and spliced. She says the lights aren’t quite as bright as the Lumary Max set below, but the brightness is adjustable. There’s also a radar motion sensor included, which she’s still testing. The Eufy S4 set also works with the Matter protocol, so it will work with Apple, Google, and Alexa’s smart home ecosystems. It’s got a waterproof rating of IP67 like the Govee set above.

Cync

Dynamic Effects Outdoor Smart Eave Lights

Cync, which comes from appliance maker GE, makes affordable smart bulbs and other smart lights I like, so it’s not a huge surprise that I also liked the brand’s Smart Eave Lights. They were easy to install with 3M sticky strips already installed on the individual lights, and since my eaves are out of safe reach on my townhouse, I used the lights on my balcony railing with great success. One piece of the 100-foot set (it comes with four strings, plus an extension) was the perfect length to loop around my 9-foot-long railing. The set quickly connected to the Cync app, and the power cord is nice and long to make it easy to reach wherever your power outlet is. It has a waterproof rating of IP65.


If You Can’t Install Permanent Outdoor Lights

Not every home is a good fit for these types of lights. I haven’t yet found a permanent light set that works with my home, so here’s what I’ve used instead for a similar result.

Twinkly Strings Multicolor Lights on a Christmas tree

Twinkly

Strings Multicolor

These lights are photographed on a tree, but they have a weatherproof rating of IP44 (for both the lights and the power supply) to be used outside. I love how much you can customize these lights. You’ll use the app to take a photo of however you’ve set up your lights, whether that’s around the tree, around your balcony’s railing, or along the front of your house, and then you’ll be able to customize the lights and pattern based on how you arranged it. There are tons of fun light designs already in the app, and you can make your own. It’s a good option if you can only do string lights but want smart capabilities. These lights are also compatible with Amazon’s, Google’s, and Apple’s ecosystems. Twinkly also makes an icicle-style smart light string ($110), which I love using outside too; they’re currently hanging above my garage door.


More Outdoor Lights We’ve Tested

  • Cync Outdoor Light Strip for $154: I was really hoping this would be a good solution for outdoor lights for my balcony, but this light strip is heavy and tall, and better designed to use to line a yard versus sticking onto the side of a railing. It comes with grass stakes to line it.
  • Lepro’s E1 AI for $153 (50 ft): These permanent outdoor lights are completely sold out right now, but they are another more affordable option. However, they aren’t as cheap as Cync and you will have to get around the app’s AI to really get the most out of it.
  • Lumary Outdoor Permanent Lights Max ($260 for 105 ft.): Lumary’s lights were frustrating and limiting for our tester. The app wasn’t intuitive or easy to use, and our tester actually had to have the power box replaced after she tried to connect the lights to a different phone. She liked how bright the lights were, and the fact there’s a physical remote, but the app, power box shutdown, and installation limitations compared with other sets (no splicing ability, installation recommended from the left) make this one we’d skip. Lumary has since released an updated version of its outdoor permanent lights, the Permanent Outdoor Lights 2, which includes a completely redesigned app, including the addition of custom-scene saving, but we haven’t tested them yet.

FAQs

What Are the Cons of Permanent Christmas Lights?

The only real downside to permanent Christmas lights, or permanent outdoor lights of any kind, is the cost. These sets usually cost significantly more than a light string, even the smart ones. That’s because they’re designed to last longer on your home, and the more expensive sets allow you to cut and splice the cords to perfectly fit your home instead of dangling strings and extra lights. It’s an investment, but one you can enjoy year-round.

Are Permanent Outdoor Lights Worth It?

Yes, because you’ll install them once and be good to go with every holiday in your future: Christmas! Halloween! Your fave sports team headed to a big championship match! Your kid’s graduation (or your own)! Similar to how smart bulbs can give you so many options inside your home, the possibilities are endless and something you’ll be able to use and enjoy year-round.

How Does WIRED Test Permanent Outdoor Lights? What Happens When We’re Done Testing?

WIRED tests permanent outdoor lights on the homes of our reviewers. We’ve tested these lights on three different homes in separate areas with serious weather: Washington state, Missouri, and Scotland. We’ve also tested a set in the more mild climate of Southern California. We install these on the homes themselves and leave them up for at least a few weeks, if not months and years (depending on performance), to see how they hold up. Our picks remain on our homes for long-term testing, as these lights are supposed to be permanent, and used sets are safely disposed of.

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