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Power Technology

Tesla Is Plugging a Secret Mega-Battery Into the Texas Grid (bloomberg.com) 230

An anonymous reader quotes a report from Bloomberg: Elon Musk is getting into the Texas power market, with previously unrevealed construction of a gigantic battery connected to an ailing electric grid that nearly collapsed last month. The move marks Tesla's first major foray into the epicenter of the U.S. energy economy. A Tesla subsidiary registered as Gambit Energy Storage LLC is quietly building a more than 100 megawatt energy storage project in Angleton, Texas, a town roughly 40 miles south of Houston. A battery that size could power about 20,000 homes on a hot summer day. Workers at the site kept equipment under cover and discouraged onlookers, but a Tesla logo could be seen on a worker's hard hat and public documents helped confirm the company's role. Property records on file with Brazoria County show Gambit shares the same address as a Tesla facility near the company's auto plant in Fremont, California. A filing with the U.S. Securities and Exchange Commission lists Gambit as a Tesla subsidiary. According to a document on the city of Angleton's website, the installation will use lithium iron phosphate batteries that are expected to last 10 to 20 years. The document says that it will generate around $1 million in property tax revenue for the city and the site will be unmanned but remotely monitored.
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Tesla Is Plugging a Secret Mega-Battery Into the Texas Grid

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  • Why keep it secret? (Score:2, Interesting)

    by jonwil ( 467024 )

    Why would Tesla want (or need) to keep a project like this a secret?

    • by couchslug ( 175151 ) on Monday March 08, 2021 @05:17PM (#61138302)

      "Secrecy" is a great way to attract attention.

    • by Narcocide ( 102829 ) on Monday March 08, 2021 @05:28PM (#61138344) Homepage

      Because of the violent backlash from the populace when they find out it doesn't run on coal.

    • by rsilvergun ( 571051 ) on Monday March 08, 2021 @05:37PM (#61138392)
      ensuring nobody ever finds out about it, because lord knows nobody around here RTFAs.
    • Why would Tesla want (or need) to keep a project like this a secret?

      Clearly they didn't.

    • They dont, its part of the hyperbole that always accompanies tesla stories.
    • because the media, and some people, are dickheads.

    • Why would Tesla want (or need) to keep a project like this a secret?

      This is Texas we're talking about. It's likely the coal rollers would take their 6.7L V8s emissions machines just to do donuts on the construction site of the battery. Or use the battery for target practice. Or have one person doing donuts while the passenger does target practice out the window.

  • Do they mean 100MW generation capacity or 100MWh storage capacity? Or Both? A typical house in USA runs at about 1KW electrical power, so 100MWh would power 20,000 homes for about 5 hours at best... hope the power is not out for any longer than that!

    • Well, it's just batteries. Batteries don't generate power, they only store it. So the assumption would have to be 100MWh. Which means it can power 20,000 homes for one hour. Something like this can smooth out power spikes, but will not help when there is sustained exceptional draw on the grid like Texas recently experienced. You actually have to expand the generation capacity for that.
      • Greater Houston is 7 million people.
        20,000 homes for an hour or two or five is ... insignificant.
        I have an Energizer AA here that can also provide power to 0% of Houston for a couple hours.

        • I have an Energizer AA here that can also provide power to 0% of Houston for a couple hours.

          You may want to replace it, as it must be dead... because my AA can power 0% of Houston for an infinite amount of time.

      • Re:100 Megawatts? (Score:5, Interesting)

        by slack_justyb ( 862874 ) on Monday March 08, 2021 @05:39PM (#61138410)

        So the assumption would have to be 100MWh.

        I would disagree with that assumption. The Hornsdale, Australia project was told to the press to be a 150MW install before it was built. Once built, the facility was true to the 150MW provision [abc.net.au] with 193.5MWh supply [wikipedia.org]. That project was also built by Tesla. So I would take that 100MW at exactly face-value, the facility will be able to provide 100MW, for how long? Who knows. But I think it would be wrong to assume that they said 100MW and meant 100MWh when previous projects they cited MW and actually meant MW.

        However, that is my take on the matter. Take with a dash of salt as usually required for most of my comments.

      • Which means it can power 20,000 homes for one hour.

        I don't think the design is to power even a single home for any amount of time.
        Texas came very close to total grid collapse due to frequency instability.
        This is instantly available conditioned power. It could buy them much needed time in the event of a catastrophe.

        Beyond that, I suspect he just means to profit off the arbitrage... which isn't weird.
        Frankly, I'm surprised it hasn't been done before now with Texas' market.

    • by Rei ( 128717 )

      It's actually primarily about providing frequency support, not voltage support.

    • Re:100 Megawatts? (Score:5, Informative)

      by Guspaz ( 556486 ) on Monday March 08, 2021 @07:01PM (#61138736)

      The capacity isn't super relevant, this isn't a UPS. Look at how Tesla's first "big battery", the Hornsdale Power Reserve, is being used. Frequency control and grid stability mostly, at which it's prevented a bunch of outages. Even being able to dump power into the grid for a few seconds can be enough to prevent widespread blackouts, because it can stabilize the grid frequency long enough to stop it from collapsing while other stations respond.

      You can do a whole lot to stabilize a grid if you can respond instantaneously. Almost every other type of power generation takes seconds if not minutes to spin up turbines and generators, while a big battery can respond in milliseconds.

    • It's 100MW generation capacity. Large grid storage solutions are typically measured in how much they can generate/absorb, not what their total storage capacity is, because it's far more important to the grid to know how much of a demand spike they're able to deal with.

      The storage itself isn't that important - they have power plants to deal with the long term loads. It's the frequency dropping when a shit ton of people turn on their ovens at the same time that they're worried about.

  • by bferrell ( 253291 ) on Monday March 08, 2021 @05:26PM (#61138332) Homepage Journal

    These aren't his usual Li-ion batteries they're LiFePO4... This don't from Tesla or SolarCity technology. That in and of itself is enough to make the want to keep things under wraps.

    Mostly this tech comes direct from China. Even the US LiFePO4 battery "makers" import cells from chinese factories for this.

    Can you hear Texas howl when they figure it out?

  • by olddoc ( 152678 ) on Monday March 08, 2021 @05:35PM (#61138380)
    https://ieefa.org/big-battery-... [ieefa.org] If you can buy electricity at $.02 per kWh and sell it instantly at $1.00 per kWh it could be very profitable, as the big battery in Australia has shown. Texas apparently needs quick responding power and this will really help -- and make a good return for Tesla.
    • What Texas needs (Score:5, Informative)

      by rsilvergun ( 571051 ) on Monday March 08, 2021 @05:40PM (#61138424)
      is to hook up to the national grid so they can share power as needed. They don't want to do that because they would have to meet minimum federal reliability guidelines. e.g. they would have had to weatherize their grid.

      Ironically if Texas had connected to the other state's grid they wouldn't have needed their grid because they would have been forced to weatherize and wouldn't have gone down in the first place...

      To me this seems like a pretty lousy solution. Tesla gets to sell expensive electricity because Texas won't spend the money up front to make their grid resilient. It's a lose-lose for Tx but a huge win for Tesla.
      • No, what Texas really needs is to rip out all of those grid-powered natural gas pumps and replace them with natural-gas powered pumps. Basically, go back to those long forgotten prehistoric days (circa 2000 or 2010) when the reliability of the natural gas supply was the primary goal of the natural gas distribution system.

        As an alternative, they could hang the guy who saw that the grid needed to shed some load and decided to cut off the substations that feed those pumps. (This is a bit simplified, but not

      • Re: (Score:3, Insightful)

        The idea that you can't even see anything but the virtues of collectivism and there might be something in being independent and taking control of your own destiny speaks volumes. It's a big problem today, this blindness.
        • I'm a Federalist.
        • by Jeremi ( 14640 )

          The idea that you can't even see anything but the virtues of collectivism and there might be something in being independent and taking control of your own destiny speaks volumes.

          Your immediate resort to irrelevant ad-hominem attacks, instead of actually thinking about the issue at hand, says something as well.

      • by vix86 ( 592763 )

        To me this seems like a pretty lousy solution.

        It's not meant to be a solution. I've seen this mentioned a lot but all the articles I saw either don't mention that Tesla is trying to "solve" anything or everyone is assuming that the close proximity (temporally) to the winter disaster means that this is somehow some attempt to fix that.

        The reality is likely to be more that Tesla sees an opportunity to elbow in on the peaker plant market. In addition to Tesla, there are a couple [pv-magazine-usa.com] of projects [bizjournals.com] looking to add grid battery storage in Texas. Over short term flu

    • $1.00 is conservative, during the last crisis the price spiked to the cap of $9.00 per KWh, could easily have gone higher otherwise. Lots of $$$ to be made in a similar situation.

    • Plus, you can save the grid an enormous amount too. The gas peaker plants usually used to do this are *much* more expensive.

  • Not an electrical engineer, but I heard this in some media reports:
     
    We were minutes away from the grid going totally down
     
    I also heard this...
     
    Some electricity was not routed to generators themselves, which mean they couldn't run some heating equipment
     
    So here's my question: would these batteries have given ERCOT extra time to figure something out, or will this capacity not make that much of a difference?

  • Why is this battery a secret?
  • A Tesla subsidiary registered as Gambit Energy Storage LLC is quietly building a more than 100 megawatt energy storage project in Angleton, Texas, a town roughly 40 miles south of Houston. A battery that size could power about 20,000 homes on a hot summer day.

    For how long?

    It's a 100,000 KWHr battery, divide that by 20,000 homes and you get 5 KWHr per home - how long does 5 KWHr last in a Texas home on a hot summer day?

    That seems really small.

    This website: https://www.texaselectricityra... [texaselect...atings.com]

    Says the average Texas home uses just over 39 KWHr/day, so this is more like 100,000 / 39 = 2,600 homes... for 1 day... then you need to recharge it.

    • Shhhh. That's the real secret.
    • Well the journalist as usual doesn't know the difference between MW and MWh so we've no way of knowing much about the operational abilities of the battery. It could be that it can produce a peak power of 100MW, which is pretty big, for an unknown amount of time, or, like you have guessed, that it stores 100MWh of electricity. Who knows!
    • by gweihir ( 88907 ) on Monday March 08, 2021 @06:42PM (#61138672)

      It is a battery. Hence it is ultra-fast balancing energy. It is not intended to provide energy for longer times. It is intended to give slower balancing energy providers like gas turbines and water turbines time to start up to keep the grid going in case of major disturbances, primarily when some old, unreliable nuke needs (again) to SCRAM in order to not blow up...

      On the side, you can also use part of the capacity to store wind and solar when there is more than needed and provide it when there is less. But that is a secondary use.

    • by Kremmy ( 793693 )
      Look up the information about how the big battery in Australia has been able to cover peaks and flows and provide enough of a window for fueled generators to come online to meet demand. This is a necessary part of a modern electrical grid.
  • Seems theres alway a new battery compound, i wonder whats going to happen to all these chemicals in 10 or 20 years time and they are worthless because new technology is "different".
    • by Jeremi ( 14640 )

      Seems theres alway a new battery compound, i wonder whats going to happen to all these chemicals in 10 or 20 years time and they are worthless because new technology is "different".

      The average American gasoline-powered car discharges 340 pounds of chemicals [fool.com] directly into the atmosphere every month, with no recycling, sequestering, or otherwise safely disposing of any of it, ever.

      Compared to that, the technical challenge of recycling or safely disposing of a fixed amount of chemicals per car after 10-20 years of service is pretty minor.

    • Substantial portions of battery electrolyte are already often not recycled, although some electrolyte is fully recycled. The focus is generally on metals.

      We still use many older battery chemistries even though there are "better" ones, because they are known and they are cheap. Ye olde lead acid flooded/wet cell car battery still dominates automotive starting, even though most of us who have jumper packs now literally have something with essentially a R/C car or quadcopter battery in it. I got mine on sale a

  • This is pretty small compared to the texas power market. Its more than likely a play for buying cheap power and reselling it on the spot market. He would probably need a few hundred to buffer the reliability of the wind power
  • If it as intended as a "secret" they would have done a better job of concealing it, instead of no job at all. They have workers wearing hard hats with "TESLA" emblazoned on them. That pretty well gives it away. Oh, you mean the subsidiary is not named "Tesla"? Wow. I have never heard of that happening elsewhere at all. So now somebody has "figured it out" and wants credit for being a sleuth. Sorry. Fail.

  • In yet another example of free market capitalism relying on socialism to clean up its mess.
  • The marketing department is plugging secret bullshit into your brain.

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