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Power

Tesla's Virtual Power Plant Had Its First Event Helping the Grid 74

Klaxton shares a report from Electrek: Last year, Tesla launched a VPP pilot program in California, where Powerwall owners would join in voluntarily without compensation to let the VPP pull power from their battery packs when the grid needed it. Following the pilot program, Tesla and PG&E, the electric utility covering Northern California, launched the first official virtual power plant through the Tesla app in June. This new version of the Tesla Virtual Power Plant actually compensates Powerwall owners $2 per kWh that they contribute to the grid during emergency load reduction events. Homeowners are expected to get between $10 and $60 per event. Earlier this week, Tesla's California VPP expanded to Southern California Edison (SCE) to now cover most of the state. Just days later, the Tesla VPP had its first emergency response event.

Tesla reached out to Powerwall owners who opted in the program through its app yesterday to warn them of the event and give them the option to opt-out if they needed all the power from their Powerwalls today. It looks like 2,342 Powerwall owners participated in the event on the PG&E network and 268 homes on the SCE grid. For PG&E, Tesla's VPP was outputting as much as 16 MW of power at one point during the event -- acting as a small distributed power plant.
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Tesla's Virtual Power Plant Had Its First Event Helping the Grid

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  • but Elon always seemed to dislike V2G although it's supposed to be a feature of the Cybertruck

    • by ciaran.mchale ( 1018214 ) on Friday August 19, 2022 @08:20AM (#62803187) Homepage

      I think there are two reasons for Tesla cars not supporting vehicle-to-grid capability (yet).

      First, the lifetime of a car's battery is related to how many charge-discharge cycles the battery undergoes. For example (using made-up numbers), if you get 200 miles per charge and you can recharge the battery 2000 times before it degrades significantly, then you have a battery lifetime of 200 * 2000 = 400,000 miles. But if you frequently use the car to power an off-grid home or a home during a blackout, then you will find that your car's battery needs to be replaced far earlier than 400,000 miles. That could spell a PR disaster, because many car owners would not realise that car-to-grid can shorten a car battery's life.

      Second, I forget the technical name of the valve component, but Tesla vehicles use a one-direction rather than a two-direction electrical valve in the car, which saves on costs but prevents car-to-grid functionality.

      In recent years, some significant improvements have been made to battery technology. For example, LFP batteries support about 3 times the number of charge-discharge cycles of lithium ternary batteries. And Tesla has been funding researchers who have been making progress towards a "million mile battery" and even a "100 year battery". As the expected lifetime of batteries gets to be significantly longer than the expected lifetime of a car, it is reasonable to assume that more and more car makers will support car-to-grid, since the battery will still likely outlive the car.

      • by ruddk ( 5153113 )

        I saw a a snapshot of a EV screen, forget which, it had a 10.000kWh or 4000 hour limit to the V2L function.

      • Second, I forget the technical name of the valve component, but Tesla vehicles use a one-direction rather than a two-direction electrical valve in the car, which saves on costs but prevents car-to-grid functionality.

        Diode?

        https://en.wikipedia.org/wiki/... [wikipedia.org]

    • by AmiMoJo ( 196126 )

      He often gives things the wrong name too. This isn't a power plant, it doesn't generate anything. It's storage.

      • by necro81 ( 917438 ) on Friday August 19, 2022 @11:14AM (#62803741) Journal

        This isn't a power plant, it doesn't generate anything. It's storage.

        While you are technically correct, from the standpoint of a grid operator it doesn't really matter. When demand outstrips generating capacity, the grid operator calls for more power. This collection of batteries can deliver power, so it gets viewed as a "power plant" in the same way that a gas turbine peaker plant is. The fact that, at other times, all those batteries are on the demand side of the equation is irrelevant. (Many of those batteries are being charged by residential solar, and so end up time-shifting electricity that would otherwise go out immediately as net metering - a further complication when thinking about whether a stack of batteries is a power plant or not.)

        Notably, a collection of batteries functions identically to a pumped hydro station, and I don't hear anyone getting pedantic about the name given to that.

      • You mean these aren't generators? Who would have known?

        https://www.homedepot.com/b/Ou... [homedepot.com]

        It is unfortunately a common terminology, I think that ship has sailed.

      • He often gives things the wrong name too. This isn't a power plant, it doesn't generate anything. It's storage.

        Since Tesla Powerwalls are often installed along with solar systems, it technically is mostly a power plant.

    • Now there's an app for it.

  • How much does electricity in California cost? This sounds like high demand prices in the Enron days.
    • Re:$2/KWh ?! (Score:4, Informative)

      by Smidge204 ( 605297 ) on Friday August 19, 2022 @08:05AM (#62803153) Journal

      This is emergency pricing. The utility is willing to pay $2/kwh (presumably more since I assume Tesla takes a cut) for the ability to cover a sudden surge in demand or loss of generating capacity that might otherwise result in a widespread blackout.

      They don't say how long the event lasted but it's likely on the order of minutes to maybe just over an hour. I'd be interested to see an actual timeline honestly...
      =Smidge=

      • by fgouget ( 925644 )

        They don't say how long the event lasted but it's likely on the order of minutes to maybe just over an hour. I'd be interested to see an actual timeline honestly...

        From the video in the fine article: Active Event - 2 hours left - Discharging
        =Smidge= to you too.

        • "2 hours left" just means that's how long it will take to discharge the battery at the current rate. This tells us absolutely nothing about how long the power deficit lasted or what the demand profile was.

          The "Event" was scheduled from 5AM to 9PM but this is only the window of time during which their Powerwall maybe called upon to deliver some power.

          The only clues we have are the video and screenshot from two different people, showing times of 6:10 and 6:54 respectively, both showing ~16KW. We don't know if

          • by mcgett ( 891257 )

            The "Event" was scheduled from 5AM to 9PM but this is only the window of time during which their Powerwall maybe called upon to deliver some power.

            I am customer that is part of the VPP and this isn't accurate. The discharge period was clearly defined as being from 6:00-9:00pm and was clearly communicated within the Tesla App 24 hours before. The 5:00am start time simply changed some of the Powerwalls rule. The first change was that the Powerwall could be recharged from the grid versus just from solar (similar to the Stormwatch feature) if the user had enable this option. The second change was that it stopped the Powerwalls from discharging prior t

      • The VPP event was from 6:00-9:00pm, so 3 hours. Looks like it provided about 35.5 MWh to the grid during this time.
      • It is $2/kwh for a portion of the power, which would be presumably cheaper than a peaker plant coming online. That isn't to say that all the power generated at that time period cost that much, but only this power, it balances out with the other power generation and someone gets less profit than before to cover the difference or the cost is distributed among many customers.

    • Utilities have been pushing everyone to time-of-use billing, where you pay crazy prices at certain times. On high demand days they offer discounts to those that conserve - if you don't conserve you pay up during that time.

    • by Kevoco ( 64263 )
      IN N.J. that would be about 9x the cost to purchase that same kWh - a decent incentive!
    • I live in Tesla (er, Fremont) California. My rates for electricity swing from $0.19/kWh to $0.53/kWh depending on the time and who generated the power. Peak rate is between 3PM to 9PM.

  • In Ontario there's a couple programs where instead of bringing more supply online, they pay industrial consumers to reduce demand during peak times. Some can do this by turning off equipment for a couple hours, and others, like our facility, can do it by switching the whole facility to backup generators. The program is quite lucrative for these businesses, and reduces the peak demand significantly, reducing the need to build more infrastructure (both supply and distribution). Once we have a lot more EVs
    • by esme ( 17526 )

      I agree, EVs plugged in and charging does seem like a good optional drain that could be dialed back in an emergency. Particularly charging at work during the day, which seems like a likely scenario for the late-afternoon peak-demand scenario.

      There are certainly times when I absolutely need my EV to charge, but they are few and far between (mostly road-trips where I make a pit stop to charge and am sitting there waiting for it). But it's usually completely optional and I'd be just fine charging at home or wa

      • We have some smart chargers here in the UK linked to the price of electricity in half hour slots and also to what produces the electricity (ie. clean or dirty) via smart meters and you can configure it to charge only when the price is low and clean or completely override all settings for current needs
      • by RobinH ( 124750 )
        I was actually considering a system where the facility could draw a small amount of power back from the vehicle batteries during peak times, in exchange for free charging the rest of the day.
    • by hipp5 ( 1635263 )
      Similar in NS. The pulp and paper mills get preferential pricing (I think as low as $0.05 / kWh vs. the $0.17 that retail pays) and in exchange they have to agree to cut production when Nova Scotia Power tells them to.
    • So youâ(TM)re basically running your own gas or diesel powered power plant then during those hours. Not sure how that jives with the climate change crowd, but itâ(TM)s a mirage then that running solar and wind on the grid is a net good, since it is also making it frequently unstable, causes generators across the industry that are ostensibly much less optimized and more wasteful to consume more gas/diesel.

    • by jefftp ( 35835 )

      Texas has incentive programs like this as well. And it's being taken advantage of by crypto-miners (https://www.houstonchronicle.com/business/columnists/tomlinson/article/Tomlinson-Cryptocurrency-miners-profit-from-17369941.php).

      1. Squander limited resources.
      2. ???
      3. Profit from incentive pay that asks you to use a more reasonable share of the scarce resources.

  • by atomicalgebra ( 4566883 ) on Friday August 19, 2022 @09:27AM (#62803385)
    The same idiots claiming nuclear is too expensive are the same people advocating for $2 per kWh battery backups. Just for the record Diablo Canyon produces electricity for 2.78 cents per kWh and sells it for about 6 cents(that includes electrical infrastructure costs and other total costs).
    • by Ichijo ( 607641 )

      Just for the record Diablo Canyon produces electricity for 2.78 cents per kWh and sells it for about 6 cents(that includes electrical infrastructure costs and other total costs).

      No, electricity in SLO averages 26 cents per kilowatt-hour. [energysage.com] And to keep Diablo Canyon open, PG&E wants a $1.4 billion "forgiveable" loan [newtimesslo.com], which could raise electric rates another 3 cents.

      29 cents is less than $2.00 but electricity from baseload plants is always cheaper than that from peaker plants.

      • https://en.wikipedia.org/wiki/Diablo_Canyon_Power_Plant [wikipedia.org] "The plant produces electricity for about 6 cents per kWh," The PG&E fact sheet claims that it produces electricity for 2.78 cents.

        Also that loan is only necessary because the state forced them to shutdown in 2016. Otherwise they would not need them.

      • Just for the record Diablo Canyon produces electricity for 2.78 cents per kWh and sells it for about 6 cents(that includes electrical infrastructure costs and other total costs).

        No, electricity in SLO averages 26 cents per kilowatt-hour. [energysage.com] And to keep Diablo Canyon open, PG&E wants a $1.4 billion "forgiveable" loan [newtimesslo.com], which could raise electric rates another 3 cents.

        29 cents is less than $2.00 but electricity from baseload plants is always cheaper than that from peaker plants.

        You're taking the average cost of power in a region, not the cost of that specific generator. Nuclear plants have operation costs often in the low single digits of $/MWh, extremely cheap. Most of the cost of a nuclear plant takes the form of capital expenditures, not O&M. So a large upfront cost to build (and associated interest on loans), cost of safety and emission system upgrades and replacement, etc. For the amount of power they produce the actual cost in salaries and fuel rods is a pittance, wh

    • by necro81 ( 917438 )

      The same idiots claiming nuclear is too expensive are the same people advocating for $2 per kWh battery backups.

      This is a solution for managing peaks in demand (or dips in supply). Diablo Canyon, supplying baseload power, is running pretty much continuously at full capacity. It would be fantastically expensive to build out nuclear that could handle 100% of peak demand, because for huge amounts of time that capacity would be sitting idle.

      A more apt cost comparison would be to compare the $2/kWh rate t

      • Every rational scientist is suggesting we build a nuclear baseload which would be the least expensive solution. No need to cover all peaks. A large nuclear baseload would reduce costs by requiring less storage and peaking.
    • Northern Illinois & Chicago are almost completely nuclear powered and I pay less than 7 cents per kWh. Something is rotten in California.
      • Our current governor(Gassy Gavin) and previous governor(failed Jesuit Brown) are both fossil fuel men. Their families fortunes are tied into the fossil fuel industry.
      • Northern Illinois & Chicago are almost completely nuclear powered and I pay less than 7 cents per kWh. Something is rotten in California.

        Totally agree

        A friend of mine works for a big electric power provider in California. My friend gets to see some very interesting numbers in their work, especially when it comes to meeting diktats from SAKramento regarding GREEN power production. To call it "political arm twisting" is being extremely polite since it completely distorts the company's ability to invest properly in electric distribution infrastructure. Yep, State says "You GOTTA BUILD GREEN" completely overrides Provider's probelm of "How do

        • In Illinois there are two parts to your electric bill, the distribution and generation portion. You can go with the same ComEd for both or choose a third party. I use MC2 which has a certified green (wind and solar) generation option that costs almost the same as conventional. Ahh, California, land of business unfriendly regulations. Unless youâ(TM)re a farmer or PG&E. The solution to water shortages in the west is to cut back some agricultural allotments and increase water prices to let the free
  • It's the customers equipment they paid full price for (and then some) not Tesla's. Tesla should have no role to play and certainly should not be financially rewarded.

    You don't even need a battery to get kickbacks all you have to do is use less energy than you otherwise would. (e.g. PG&E's power saver rewards)

    • It's the customers equipment they paid full price for (and then some) not Tesla's. Tesla should have no role to play and certainly should not be financially rewarded.

      Tesla's role is coordinating operation of the equipment. Someone has to do it. It could conceivably by managed directly by local utilities in the future, though.

      You don't even need a battery to get kickbacks all you have to do is use less energy than you otherwise would. (e.g. PG&E's power saver rewards)

      Yes, but this is providing power when it's needed most, as opposed to just any time the sun is shining. Both of those things are useful, in different ways.

      • Tesla's role is coordinating operation of the equipment. Someone has to do it. It could conceivably by managed directly by local utilities in the future, though.

        There is no reason the grid can't provide require signaling. They already do this with AC coupled PV systems to get PV systems to back off and stop sending energy.

        Yes, but this is providing power when it's needed most, as opposed to just any time the sun is shining. Both of those things are useful, in different ways.

        I think there is a misunderstanding. My comment was about being rewarded for choosing to conserve energy at a certain time after receiving notification from the power company. This is not linked to PV or ESS.

    • It's the customers equipment they paid full price for (and then some) not Tesla's.

      At no point was the equipment not the customers. At no point did Tesla take ownership away from the customer. Tesla bought power from them, completely voluntarily.

      Tesla should have no role to play and certainly should not be financially rewarded.

      What? You mean customers should not have any role when you sell something to them? Do you list something on ebay and then just log out and throw away your password?

      You don't even need a battery to get kickbacks all you have to do is use less energy than you otherwise would. (e.g. PG&E's power saver rewards)

      Show anywhere in PG&E's rewards that you get a benefit of $2/kWh.

      Is your stupidity a medical condition or did you work hard to achieve it?

      • At no point was the equipment not the customers. At no point did Tesla take ownership away from the customer. Tesla bought power from them, completely voluntarily.

        It's not about ownership it's about a middleman extracting value from the customers equipment they already paid for without doing anything of value in return for it.

        Tesla should have no role to play and certainly should not be financially rewarded.

        What? You mean customers should not have any role when you sell something to them? Do you list something on ebay and then just log out and throw away your password?

        Sorry this makes no sense to me I have no idea what you are even trying to say.

        The point is customers should be getting the full amount from the power company not Tesla. There is no reason the power company can't signal a request for energy and reward those who provide it. There is no need for Tesla to be in the loop.

        Show anywhere in PG&E's rewards that you get a benefit of $2/kWh.

        It's in the FAQ...
        https:// [pge.com]

  • but that is too much to ask when you live in a third world country.

  • A typical power plant is 1000 MW, 16 MW is scarcely noticeable. Good Tesla clickbait though.

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