Elon Musk Promises World's Biggest Lithium Ion Battery To Australia (cnn.com) 272
Elon Musk is following through on his promise to solve an energy crisis in Australia. From a report: His electric car company, Tesla, has teamed up with a French renewable energy firm and an Australian state government to install the world's largest lithium ion battery. Paired up with a wind farm in the state of South Australia, the battery will be three times more powerful than the next biggest in the world, Musk said at a news conference in the city of Adelaide on Friday. "If South Australia's willing to take a big risk, then so are we," he said. The announcement comes after billionaire entrepreneur Mike Cannon-Brookes threw down the gauntlet to Musk in March, asking if Tesla was serious when it claimed it could quickly end blackouts in South Australia. "Tesla will get the system installed and working 100 days from contract signature or it is free. That serious enough for you?" Musk wrote on Twitter at the time.
100 working days, bureaucracy accounted separately (Score:4, Interesting)
I am particularly amazed by the 100 working days.
I assume is a 24hr working day and does not include all bureaucrat approvals.
In Italy, you need 100 days just to have the request for planning being considered....
(Yes, this is one of the reasons we are going down the drain)
Looking forward for how this "bet" pans out.
Re:100 working days, bureaucracy accounted separat (Score:4, Informative)
I am particularly amazed by the 100 working days.
I assume is a 24hr working day and does not include all bureaucrat approvals.
In Italy, you need 100 days just to have the request for planning being considered....
(Yes, this is one of the reasons we are going down the drain)
Looking forward for how this "bet" pans out.
From the summary "100 days from contract signature or it is free." I assume they would wait to sign the contract until after the bureaucracy has been settled?
Re:100 working days, bureaucracy accounted separat (Score:4, Insightful)
I'd also expect Tesla to start the state-side work well ahead of that signing, so the post-signature project is more of a 'deliver and install' than 'design, fabricate, test, deliver and install'.
And given the mass and distances we're talking about, I'd not even be surprised if there were components on Australia-bound ships before the signing, too.
It'd be a gamble, but a pretty solid one, with a huge publicity payoff.
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Its supposed to be operational for summer, which is 5 and a half months away
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From one of the articles linked from a reader above, it's 100 days after the signing of the grid interconnect contract with whoever runs the Aussie national grid, not the supply contract with Musk.
Hope they have a site ready for him, leveling and concreting a section of land can take years. Yeah, yeah, I know Aussie is flat, but not that flat.
That's not a battery (Score:4, Funny)
THIS is a battery.
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Wow! That's shocking!
Worlds "biggest" (Score:2)
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Good news, everyone! (Score:3, Insightful)
I like this, this is good news for nuclear power.
Imagine a Q&A during an announcement of breaking ground on a new nuclear power plant.
Reporter: Would you care to comment on the recent meltdown at the Springfield nuclear power plant?
Person at podium: Oh, that was terrible and I feel sad for all those people displaced and otherwise affected. However we've made a deal with Tesla for their new battery backup system so nothing like that can happen here. We'll have enough reserve power on site to run the lights, computers, sensors, fire fighting systems, and cooling pumps for two days.
People believe new batteries are what wind and solar need to be replace coal and nuclear power. I believe that technology like this will help nuclear power more than it could wind or solar. A lack of a power source capable of running the cooling pumps was what killed the reactors at Fukushima. Chernobyl didn't have such a problem but that was (effectively) an experimental dual use (for energy or weapons production) reactor, it also lacked a protective dome that would be required had it been built anywhere else. Any new reactor would not likely even need a separate power source to shutdown safely but a big battery like this would be very useful for peak load management. It'd also look good to regulators, to the public, and look good for Tesla.
(Yes, I realize that I typed "power" when "energy" would be (more) correct, I just imagine that's how someone at a podium would speak to reporters.)
Re: Good news, everyone! (Score:2)
And again you have no idea what you are talking about. RBMK was not an experimental reactor, reactors of that type have already been running for years before the Chernobyl power plant has even been built. It also was not a dual use design as it is, it simply was built along the lines of previous military reactors because this is what the leading engineer had experience with and because it simply has been faster to scale up an older but already proven desing. You are such an atomic fanboy but don't really kn
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They actually had battery backup power available at Fukushima and were running the emergency pumps as soon as possible. Initially they were worried that the batteries would run it, but it turned out that damage to the plumbing meant that the water never reached the reactors anyway.
The damage to the plant is what really prevented recovery.
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You have it about right. My point is that as useful as a big battery can be to wind and solar it can be just as useful, or even more so, to nuclear power.
Big complaints on the use of nuclear power is safety and it's inability to load follow. A big battery would be helpful in addressing both issues.
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This has already been done... At least in theory. Where the nuclear reactor will "fail safe" regardless of how stupid the operators might be. The core is designed so that if it goes over temp it will disassemble itself in a controlled way, stopping the fission reaction, and dispersing the components so they can cool using convection and not breach the containment structure.
The "trick" was to use mechanical components designed to melt at specific safe temperatures with a mechanical design that allowed gr
what could go wrong (Score:2)
after 1000 charges it should be fun to watch them dispose of the worlds largest poisonous explosive paper weight
Isn't solar a better solution here? (Score:2)
"South Australia's population of 1.7 million people suffer regular power cuts and energy shortages. In September, much of the state was left without power after a storm damaged crucial transmission lines. Another major blackout happened in February after an unexpected spike in demand due to a heat wave."
Seem to me solar would be a much better solution than a battery center. Solar on houses, businesses, and strategically placed solar farms. If 1.7 million regularly suffer power cuts and energy shortages I th
Translation (Score:3)
Translation...
Public/external statement:
"Tesla will get the system installed and working 100 days from contract signature or it is free."
Private/internal statement:
"Tesla will get the system installed and working 100 days from contract signature or you're all fired."
But in Venezuela... (Score:2)
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He's not complainign about subsidies. He's complaining that Toyota and GM are getting subsidies. That's very, very different.
No, he *is* complaining about subsidies - he would rather work in an environment without any subsidies!
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You're right! No company should ever provide anything to the government. People should build their own roads, their own power grids, their own power plant, own water treatment systems, they should maintain it themselves.
This will be of great benefit to all as we'd be living in the dark ages and not have to put up with reading shit posted on the internet by people with no clue.
$417 million (Score:4, Informative)
The cost is right there in the article.
You know Hannity is just a paid mouthpiece right? When coal wants a subsidy they pay him, he spouts his crap, dumb orange idiots believe it, coal gets its subsidy for 'clean coal' and then nobody builds the 'clean coal' power station. Like the Mississippi Power plant that received all those subsidies and never delivered.
Does Musk deliver on his promises? Do you want to buy an electric car with a bunch of self driving features? Or a rocket to space?
Does Hannity? Well I expect they'll try to make Hannity President next, but being a whiney little shit paid to whine, and actually doing and delivering stuff is completely different.
Re:Government Subsidy (Score:5, Informative)
Does Musk do anything that doesn't involve his hands in the taxpayer pockets?
What you don't see Musk telling us is how much it will cost if delivered on time. I can guarantee you it will be exorbitant. And then where is the cost benefit analysis vs other solutions? Musk won't talk about that stuff.
To summarize, a vendor (a.k.a. Tesla/Musk) is selling a solution for a blackout problem in South Australia.
Now tell me, WHY do you think we should ask the sales guy for the "cost benefit analysis vs. other solutions"? Do you honestly think if we burdened Musk with that he's gonna identify a solution other than the one he is selling, even if it was cheaper or better? Give me a break.
The burden of cost/benefit analysis is on the Australian government and no one else. Tough shit if they don't want to expend the time and effort to find a cheaper or better solution.
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I assume the Australian state government did an analysis. It could be that they did find a cheaper and/or better solution, only they are betting that Tesla cannot deliver on time. If the margin is small enough then why not take that bet?
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A single-cycle gas-fired plant is undoubtably cheaper, but the lead time for ~30MW is likely closer to 8 months. A dual-cycle is closer to 12 months.
Long term, for wind power to be viable it will require batteries. Beyond about 10% penetration you are stuck curtailing capacity in the spring and fall, as can be seen from California and Germany. My math makes it look like you need 10-20% of rated capacity for an hour for it to work well from a system level.
Re:Government Subsidy (Score:5, Insightful)
To summarize, a vendor (a.k.a. Tesla/Musk) is selling a solution for a blackout problem in South Australia.
Now tell me, WHY do you think we should ask the sales guy for the "cost benefit analysis vs. other solutions"?
Because this is Slashdot, the once proud home of technology savvy nerds, but now the rest home for a lot of anti-technology reactionary anti-science people.
Do you honestly think if we burdened Musk with that he's gonna identify a solution other than the one he is selling, even if it was cheaper or better? Give me a break.
The burden of cost/benefit analysis is on the Australian government and no one else. Tough shit if they don't want to expend the time and effort to find a cheaper or better solution.
And no doubt they have looked at the alternatives. One thing to note is that Australia got to their sad state by using some of the alternatives.
And for the folks that have an issue about the guvmint being involved, well, which power source doesn't? Finally though, what is overlooked here by so many is that battery systems are even considered in the mix. With Los Angeles installing a battery peaking system, and now this project, it is just pathetic that so many people here are simply opposed because of because. I guess their sense of wonder at just how impressive we have become at storing electricity in chemical systems has evolved.
Re:Government Subsidy (Score:5, Insightful)
One thing to note is that Australia got to their sad state by using some of the alternatives
To be fair, South Australia go to that sad state. Australia as a whole has no problem with power, but they also don't have enough interconnect capacity to SA to help them along.
The problem was no so much that they used some of the alternatives, but more that they didn't use them correctly and were overly keen to cut baseload capacity without testing if the market could handle what they needed.
The September outage was a one in 50 year storm which took out several UHV transmission lines linking to the supply of baseload and the interconnects. The entire grid lost synchronisation. There was plenty of capacity but no baseload to synchronise.
The December outage was again a storm this time taking out 300 individual power lines. There was plenty of capacity.
The February outage was caused by marketing masturbation. There was a capacity shortage due to some peaking plants refusing to power up their generators due to contractual disagreements. The day after the outage energy consumption was actually higher than the day of the outage and yet no problem occurred.
Now while the current problems are the result of storms and market failure, the future is due well and truly due to mismanagement. SA doesn't need batteries, they need either another interconnect or another baseload supplier. Instead they closed 700MW of baseload, and claimed tax credits as a result.
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is selling a solution for a blackout problem in South Australia.
Actually I think he's selling a battery. How that would have solved the major blackout problems in SA due to grid synchronisation issues when the baseload is cut-off I'm not quite sure yet.
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These are the people your looking for: https://en.wikipedia.org/wiki/... [wikipedia.org]
Many years ago, they were clients. Nice folks, Adelaide is a really nice city. I guarantee you, they crunched the numbers four different ways, then hired consultants to crunch the numbers (as cover). I also guarantee you they are very concerned about good and bad publicity. Not wanting politicians sticking their noses into things outside their competence, like grid operations. Which is what bad publicity gets you in SA. At the time t
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Ahh, victim-blaming. I'd expect as much from a guy who's way down deep on Elon's cock.
And no, this isn't because I'm some kind of Musk fanboi riding his e-cock. Understanding the sales guy would recommend nothing but the solution they're selling, is common fucking sense.
And here I was debating on needing to add that to my original statement. Should have counted on bullshit responses like yours.
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And here I was debating on needing to add that to my original statement. Should have counted on bullshit responses like yours.
Illegitimi non carborundum man. Don't let the trolls get under your skin. Your original post was spot on, and I suspect that the guy trolling you is just projecting his own sexual fantasies.
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No one is a victim here. He's told them what he's going to build, and he's offered them a certain price. As long as he delivers what he said for the price he claimed, no one is being victimized.
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Re:Government Subsidy (Score:4, Informative)
From the Sydney Morning Herald:
How much will it cost?
Costs were not detailed on Friday. Tesla founder Elon Musk has previously quoted US$250 ($AU330) per kilowatt-hour "at the pack level" for 100-megawatt-hour-plus systems.
The proposed system would contain 129,000 kilowatt-hours of capacity, meaning the project's cost would start at around $42 million. The head of Tesla's battery division has quoted a cost of about $65 million in the past. Other experts say a system of that size is likely to cost somewhere between $60 and $120 million.
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From the Sydney Morning Herald:
How much will it cost?
Costs were not detailed on Friday. Tesla founder Elon Musk has previously quoted US$250 ($AU330) per kilowatt-hour "at the pack level" for 100-megawatt-hour-plus systems.
They actually used the term kilowatt hours? Something is very very off there.
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Same billing term used industry-wide. Would you prefer mAH or AH? This is from a press release, not a science journal article.
Re:Government Subsidy (Score:5, Interesting)
kWh(B) - the cycle discharge rating of the battery. The bi-directional inverter is generally rated at 20% discharge rate (5-hours).
Basically to make it work they need 20-30 commodity pad-mount transformers and a dedicated 35kV circuit (or two), and level concrete pads. S&C had a similar product for years as a UPS, but this is considerably more elegant.
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Whoops, it is only 10 transformers.
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Whoops, it is only 10 transformers.
Ahh, that's okay. Probably more important to the consumer is what that kilowatt hour of electricity will cost them. not the capacity of a group of batteries will cost. Kilowatt hour apparently can mean multiple things when costing.
In reality, this is just a scaling up of the new Los Angeles peaking system, also to run lithium battery packs.
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True-- not much different than Mira Loma, beyond being close-coupled with a wind farm. Personally, I think that is where the technology will really shine, as it increases the value of power produced from the wind farm dramatically.
As for customer rates, if the goal is to maximize renewables batteries are a necessary part of the equation. Modern wind turbines turbines are around 5x the cost of gas or diesel-- 15x when you factor in a 35% capacity factor, although you don't have the fuel cost.
Wind just has
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They actually used the term kilowatt hours? Something is very very off there.
Why is that? Kilowatt hours is how electrical energy use is billed (at least in Australia) and I just pulled out my last bill and can see I used around 2200 kWh for last quarter, so around 24 kWh per day so it's a convenient unit for comparison. Unless you're thinking of seeing batteries quotes in Ah which doesn't mean much without knowing the nominal voltage.
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They actually used the term kilowatt hours? Something is very very off there.
Why is that? Kilowatt hours is how electrical energy use is billed (at least in Australia) and I just pulled out my last bill and can see I used around 2200 kWh for last quarter, so around 24 kWh per day so it's a convenient unit for comparison. Unless you're thinking of seeing batteries quotes in Ah which doesn't mean much without knowing the nominal voltage.
Here's the confusion over kilowatt hours. Did you pay $330.00 for each kilowatt hour? $72,600 is kinda pricey.
Capacity available versus capacity consumed.
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No, because, obviously, consumption happens only once, while charge-discharge cycles happen thousands of times per pack.
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AFAIK Tesla is delivering a whole system, not just some batteries that someone else integrates. It's known that this system should provide a given voltage and AC frequency to the grid. How the plant works internally, is not really interesting.
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How the plant works internally, is not really interesting.
For people who are not interested - it isn't. I'm interested.
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It makes sense that they are pitching it for energy-time units. A typical RV battery would cost about $100 for a kilowatt-hour worth of charge on average. However, lead-acid batteries get permanently damaged if drawn below 50% SoC, so $250 per kWh is a pretty good deal, factoring in standard battery prices.
It looks like the Aussies are getting their money's worth, just on the battery capacity side. The LiFePO4 batteries used tend to be long lasting, so this is something that would require little in upkee
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That's actually a pretty nice price for a 100MW peaker. $65m for 100MW = 65 cents per watt? Most around around $1W a watt or more in capital costs. Now, to be fair, they also need to supply it with charging power - but it can buy at the cheapest possible rate, whenever power is cheapest (and conventional peakers still have to buy fuel).
Sounds like a great deal.
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Don't think about it as a mere battery.
It is a power plant.
Instead of burning coal, it uses previously stored power.
A power plant with 100MW peak (saw that here in the threat, not sure if that is correct) and a few hours time to actually deliver so much power is equivalent to a small power plant.
Re:Government Subsidy (Score:4, Insightful)
Indeed. It's effectively acting as a peaking plant. An extremely responsive one.
Re:Government Subsidy (Score:5, Funny)
Musk has been building an inventory of power-wall batteries because nobody is buying them. They are sitting there costing money, so this is a brilliant play.
There are so many batteries that they are stored in the old set where they filmed the moon landing hoax and chemtrail juice
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Really? I would have thought that if they're struggling with peak load some trivial high school maths would make it clear that buying a power wall is worth while.
At least here in CA, if you're on the EV rates electricity costs 3 times as much during peak times as it does during off peak. You gain $0.34 for every kWh you can time shift from off peak to peak. That's $1240 a year on the 10kWh model. Given that a PowerWall only costs $4000 after rebates, it's pretty trivial to see that that's well worth whi
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You wouldn't want to cycle your batteries that deep. Half power cycles and they will last _many_ times longer. Which will slow down the payback, but increase it.
Re:Government Subsidy (Score:5, Informative)
That fails basic economics. If the embedded energy cost of a solar panel was greater than any possible eROI, they couldn't be sold at a profit. You might be able to get some suckers early on and government subsidies could help somewhat, but you're talking about a many multi-billion dollar industry with dozens of multinational suppliers and enormous factories. At some point, there has to be a positive eROI or the whole system would grind to a halt, as we can see from Solyndra which, despite large subsidies, failed.
But plenty of other companies are making good profits from solar (and wind, and batteries, etc.).
Solar panels (and batteries) will never have an eROI of, say, a drill head or gas turbine, but that's comparing apples to oranges. The total systems ROI of solar and wind farms are currently near, at or exceed various carbon and nuclear power systems.
If you want to make an argument that renewables will have a hard time replacing all baseload energy systems (because the power is more more diffuse, requiring a lot of land and more complicated grid management), that's a better argument to make. But any argument that starts with renewable energy simply not being able to compete in any context is wrong.
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It takes a while to get a package in South Australia from the US...
Why "from the US"? The cells are made in the far east, and the technology around them provided by the French company.
It seems inefficient if they were to ship the cells from China/Japan to the US first, and that the short delivery time is precisely due to Australia being much closer.
But anyhow, isn't this olds? Unless my old brain suffers from Deja Vu again, wasn't this news many months ago?
Re:Hope he included shipping times (Score:5, Informative)
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Wouldn't the cells be coming from the US gigafactory?
It's news because they have agreed to accept his offer.
Re:Hope he included shipping times (Score:5, Interesting)
Clarifications (Score:3)
Why "from the US"? The cells are made in the far east, and the technology around them provided by the French company.
From the US because that's where Musk's company builds stuff. Where the components come from is a separate issue.
It seems inefficient if they were to ship the cells from China/Japan to the US first, and that the short delivery time is precisely due to Australia being much closer.
You are assuming they aren't carrying any inventory of the battery cells and other electronics in question. In reality they probably have substantial stocks so it's not as if they are ordering everything from scratch. That's the beauty of building multiple products using standard components.
But anyhow, isn't this olds? Unless my old brain suffers from Deja Vu again, wasn't this news many months ago?
Musk made the 100 day offer months ago. Now it appears they have taken him up on the bet. Hence it is
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The cells are made in Reno, Nevada.
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The cells are made in Reno, Nevada.
I thought that wasn't up and running yet, and that current Tesla batteries use Panasonic 18650 cells?
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It started production in January 2016, but is not even close to being finished yet. They use Panasonic 2170 cells, which is what the Gigafactory produces.
Re:Hope he included shipping times (Score:5, Insightful)
So an African in the Americas is shipping European tech made in Asia to Australia?
All I can say is that Antarctica is under-represented.
I'm sure the penguin is involved somehow. It would be hard to pull of such an operation without Tux somewhere in the chain.
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Pretty sure there's a Linux kernel somewhere in this whole chain of affairs.
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This thing will go by boat, then rail, then truck followed by a short trip via forklift.
They will stuff everything into multi modal shipping containers...
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Re:Not that large (Score:5, Insightful)
I wonder if Musk understands that a single large battery group might not meet grid demands despite its size. A key factor is discharge rate, and for grid stabilization discharge and charge rates need to be, on occasion, much faster than what is required for cars or even home supplies.
Well you better go tell Mr Musk! Some random guy on Slashdot can save the day again by giving all of the engineers and scientists working for him some really basic information that they no doubt have completely overlooked.
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Well you better go tell Mr Musk! Some random guy on Slashdot can save the day again by giving all of the engineers and scientists working for him some really basic information that they no doubt have completely overlooked.
Actually I would not be surprised. Engineers will only look at something if assigned to do it. There actually have been similar mistakes made by battery product engineers in the past. Does Musk already have the requirements specification from the utility? I doubt it.
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Let me tell you, if you give me ~$10 billion I too can hire people to do a lot of cool things. That wouldn't make me a genius.
Nobody gave Musk $10 billion.
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Re:Not that large (Score:4, Informative)
It's probably more than enough though to deal with any transient demands causing the blackouts - these can be killers.
The UK has a hydro equivalent: https://en.wikipedia.org/wiki/Dinorwig_Power_Station
Though this isn't something you can move about or setup quickly. Musks solution is quite portable and quick to install, plus not dependant on any geographic features, and this make it VERY!!! attractive for this kind of application :)
Why they are needed (Score:5, Informative)
Take a utility in the southern USA, about 15% of their infrastructure is there for the extreme peaks in demand. The last 8% for Oklahoma Gas and Electric is used less than (I think) 12 hours a year. That's tens of billions of dollars. If a few well placed half billion dollar batteries could do the same thing it would be a good deal.
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From the Sydney Morning Herald:
"The 100 megawatt lithium ion battery, which will harness power from a French-owned wind farm north of Adelaide, will store 129 megawatt hours of electricity, enough to power about 13,000 homes for 24 hours."
This comes out to usage of about .41 kW per household, not the 2kW cited in parent.
From https://www.billrepublic.com/a... [billrepublic.com], average usage in South Australia in 2014 was 5,145 kWh/year = .59 kW = about 27,300 homes for 8 hours at .59 kW usage. But average usage dropped abou
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as people are dying in south australia frrom a heat wave.
From a previous post, it appears that the design load is 0.410 kW per household. That's 410 Watts. So I doubt many people will be running AC units. Or if they do, this battery will be empty in short order.
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I've worked with a (much) smaller system that was the same concept. At one of the off-grid First Nations reserves in BC, the power used to be supplied by a large diesel generator. Modern diesels realistically need to run at pretty much full power in order to run most efficiently, and keep their emissions tech working right. So, what the power utility did was couple the diesel with what amounts to a utility-scale UPS. The diesel runs for a few hours twice a day, typically morning and at around inner time, an
Re:Not that large (Score:5, Informative)
It more appropriately would be called the largest group of batteries.
The technical term for that is: "battery".
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No, the technical term is 'array.'
First you start with a cell. You put multiple cells together to create a battery. You put multiple batteries together to create an array.
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At this point, I think it would be wise to defer to a recognized expert [wikipedia.org] on batteries for the correct definition.
Re:Not that large (Score:5, Informative)
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Astonishing a group of large guns, aka cannons, is also a battery.
And I guess we find more examples if we think a bit longer.
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So... it's batteries all the way down?
Re:Not that large (Score:5, Funny)
Correct term is battery (Score:3)
Calling it the 'largest battery' is a bit of a misnomer. It more appropriately would be called the largest group of batteries.
You are confusing the terms battery with cell. All batteries consist of one or more cells. So the word battery is the correct one regardless of size. A large array of connected batteries is still a battery.
What is the price if he delivers on time?
Whatever they agree to in the contract.
Why is that not in any of these articles?
Because they are probably still negotiating.
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What is the price if he delivers on time?
Also, would it be all that bad for Tesla if they were late? Imagine the headline, "Tesla gives away largest battery in the world!"
Then you have Mr. Musk with a big grin on his face on TV saying something like, "Yes, it's true. We gave away a very large battery because we missed a contractually agreed upon deadline. Other than that the customer is very pleased, they got it for free after all, and the battery works flawlessly. Only next time we don't take marketing advise from Dominoes Pizza!" Everyone l
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Also, would it be all that bad for Tesla if they were late? Imagine the headline, "Tesla gives away largest battery in the world!"
Then you have Mr. Musk with a big grin on his face on TV saying something like, "Yes, it's true.
Investors might not be happy when they are already bleeding capital.
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http://www.abc.net.au/news/201... [abc.net.au]
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Have you ever disassembled a 9 volt 'battery' ?
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No, it's the largest group of cells. A group of cells has a name - a battery.
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noun
1. a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.
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You can find more details and a video Q&A here:
http://www.teslarati.com/tesla... [teslarati.com]
It's 100-megawatt, 129 megawatt hour.
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Then someone ought to tell Elon that his "World Record Battery" is gonna have a rather short stint at the top of the list.
See https://www.greentechmedia.com... [greentechmedia.com]
Quick summary, due to be completely installed by January 1, 2021.
Able to supply 100 megawatts for 4 hours (400 megawatt hour capacity).
So Mr Musk's "3 times larger than the next largest battery" is soon gonna be "One third the size of the world's largest battery"
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Good! Just like the top supercomputer of today won't be the fastest for very long - the technology and the willingness to use it is developing RAPIDLY.
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So worst case Musk can build that 400MWh battery in 300 days. Bet you buy the time that one is completed in 2021, Musk has a 1000MWh one out there somewhere.
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You kidder you....