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Will Tesla Install Home Solar Panels To Charge Cars? (buffalonews.com)

Earlier this week, Tesla signed a non-binding agreement to buy solar cells from a new Panasonic factory in Buffalo, New York -- but it's part of a much bigger maneuver. An anonymous Slashdot reader writes: "If all goes to plan, Tesla will be supplying customers with the solar panels that generate electricity that could then be used to charge the battery in their Tesla car or the battery in the Tesla Powerwall home energy storage system," reports the Christian Science Monitor. The Wall Street Journal reports that Musk's SolarCity "will sell, finance and install the panels."

But the Buffalo News suggests the deal is really "aimed squarely at skeptical shareholders" who may be leary of a proposed merger between Tesla and SolarCity," which one analyst calculates will require nearly $6 billion in extra capital. Panasonic could help shoulder the costs of the Buffalo factory, while also putting a more experienced manufacturer in charge of producing high-efficiency solar modules.

The Stack reports some shareholders have actually filed a lawsuit against the merger.

15 of 81 comments (clear)

  1. Nevada by alw53 · · Score: 3, Insightful

    This is a great move but I don't understand why Tesla built its huge battery factory in Nevada, after the wholly-owned utility commission basically killed home solar in Nevada with fees paid to the power companies. Surely that factory could have been used as leverage.

  2. Re:Divorced Talulah Riley again? by Ecuador · · Score: 2

    Right, Tesla's popular cars and SpaceX's rockets that supply the ISS are just paper... Exactly like Theranos' semi-fictional "wonder-machine"...
    And what is all this about public money? Tesla is actually the only American car company that has repaid all their government loans, with interest.

    --
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  3. For all the night shift Tesla owners by swb · · Score: 2

    Sure, you could charge a powerwall and then charge your Tesla at night from that, but there would be a lot of inefficiency in addition to heavy cycling on the powerwall.

    But overall it doesn't seem like a compelling sales pitch -- buy solar panels to charge the car that will be at work when the sun is shining.

    Maybe the spreadsheet math works financially by offsetting daytime use vs. nighttime charging.

    1. Re:For all the night shift Tesla owners by CanadianMacFan · · Score: 2

      If you are in the right jurisdiction then solar panels would be a good decision. Use the panels to generate electricity during the day and sell it into the grid. At night charge the car when the price of electricity is cheaper. You save by not buying the batteries and depending on the price difference you might be able to pay off the panels fairly quickly.

    2. Re:For all the night shift Tesla owners by Solandri · · Score: 4, Informative
      Localization of the power source doesn't matter. Everything is interconnected by the grid anyway, so only total generation and total consumption matter. Say everything except your Tesla uses x kWh.
      • Original case: x kWh generated, x kWh consumed.

      Now add the Tesla and solar panels on your house:

      • Work night shift, Solar panels generate y kWh, Tesla consumes y kWh to charge (set them both to y to simplifiy):
        x + y kWh generated, x + y kWh consumed
      • Work day shift, Solar panels generate y kWh which is sent to the grid, Telsa consumes y kWh from the grid to charge:
        x + y kWh generated, x + y kWh consumed. Same as above.

      Basically, if you work the day shift, the addition of your solar panels at your house reduces the amount of power the coal plant needs to generate by y kWh. When you plug the Tesla into a charger at work, it increases the amount of power the coal plant needs to generate by y kWh. And the whole thing is a wash. Exactly the same as if you charged the Tesla at home using (only) power from your home solar panels.

      A lot of people don't seem to get this. The marginal increase power use doesn't have to be directly connected to the marginal increase in power generation to have the same effect. This is also why you should conserve electricity even if you're in the Pacific Northwest which is powered mostly by hydroelectric. Any reduction in your consumption means a little bit of hydro power is left over and can be transmitted to the rest of the country, and a coal plant elsewhere needs to burn a little less coal. Exactly the same as if someone living next to the coal plant conserved electricity.

      For the same reason, EVs are predominantly powered by electricity from coal and natural gas, not by renewables. Those are the two power generation sources which are flexible enough to ramp up with increases in demand. EVs are only powered by electricity from renewables if you wouldn't have built the renewable plant if you hadn't bought the EV. If you would've built the renewable plant anyway, then it results in a marginal decrease in the generation from coal and gas, while the addition of an EV results in a marginal increase in the generation from coal and gas. So the EV's power is coming from coal and gas. This is the case even if the electricity from your solar panels are going straight to your EV. If in the absence of your EV the electricity from your solar panels would've instead gone onto the grid, then by putting it into your EV you are depriving the grid of those kWh, and a coal/gas plant elsewhere needs to generate those kWh.

      Tesla understands this, which is why they're trying to link home solar installation with EV car purchases. If you can link the two, then the purchase of the EV results in the installation of PV solar generation which would not have existed without the EV. And then you can truthfully say the EV is being powered by electricity from solar.

    3. Re:For all the night shift Tesla owners by Kjella · · Score: 2

      Localization of the power source doesn't matter. Everything is interconnected by the grid anyway

      I'll stop you right there, the moment you say that it means some people might want solar panels and some want a Tesla, but there's no synergy whatsoever. That there's no particular benefit to owing both a solar panel and a Tesla that doesn't exist independently. If that is the case, they don't really have anything to do with each other any more than Tesla and SpaceX. Either or none or both might be a success, but they don't depend on each other at all. It doesn't matter who owns them, they'll succeed or fail on their own merits anyway.

      --
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  4. Re:in other news by bill_mcgonigle · · Score: 2, Insightful

    And I don't have to buy them from Tesla â" there are plenty of other sellers out there.

    Yeah, but if you have a Tesla roof, Powerwall, and Model 3, then it'll handle the credits for you among the reverse net metering, the panel, and your charge-ups at the SuperChargers.

    If you put ten Teslets in at home yesterday, you can take ten Teslets out at the SuperCharger today.

    Solar City, on its own, had to make up all of the finance costs from net-metering only. As part of Tesla, they can give you flexibility on how to handle the charges. If you consume way more than your production in your cars, and go past the finance costs for your roof, then they can charge that difference to your credit card. But before that, it's much more economically efficient to keep all the charges in-system.

    If you have a non-integrated stack then you can do all the same things, but it's necessarily going to cost more because of transaction costs.

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  5. Whats the point? by whoever57 · · Score: 4, Insightful

    What's the point of this?

    Most people who charge at home, charge at night. So, without storage, solar panels don't help.

    But it's not "some storage", it's lots of storage. The largest residential Powerwall is 10kWh, so you would need 2 1/2 of these to fully charge a Leaf. A Tesla with the smallest 60 kWh battery would require 10 of them.

    If you charge every night and drive an average commute (30-40 miles/day), then I suppose one Powerwall would be sufficient.

    --
    The real "Libtards" are the Libertarians!
    1. Re:Whats the point? by whoever57 · · Score: 2

      A Tesla with the smallest 60 kWh battery would require 10 of them.

      Whoops, not 10, but, obviously 6! A P100 model would require 10 for a full charge.

      --
      The real "Libtards" are the Libertarians!
  6. Re:Divorced Talulah Riley again? by Anonymous Coward · · Score: 2, Informative

    if investor want to waste it and lose money, let them.

    I bought shares at ~$30 in 2011, sold recently at ~$200, which according to you is "waste and losing money". Whatever dude.

  7. Re:Divorced Talulah Riley again? by Bing+Tsher+E · · Score: 2

    The key word there is 'almost'. Almost all startups fail in the end. People try things out and when they don't succeed, they are put out of business. The IP they create in the meantime is passed on to more capable people to continue trying with.

  8. Re:Tesla shoud do something... by hyades1 · · Score: 2

    So let's roll in the emissions cost of the factories that manufacture regular cars, and the emissions of the trucks taking them to the dealerships, and all the emissions of the dealerships themselves, and the cost of dealing with the runoff from their massive parking lots (borne by the municipalities that host them), et cetera, et cetera.

    They promised a zero emissions car and they delivered it. You can't make so much as a paperclip that's "zero emission" if you're going to count the upstream costs.

    So basically, fuck off.

    --
    I've calculated my velocity with such exquisite precision that I have no idea where I am.
  9. Re:in other news by ShanghaiBill · · Score: 2

    Solar City, on its own, had to make up all of the finance costs from net-metering only. As part of Tesla, they can give you flexibility on how to handle the charges.

    They could have done all this with a cross-marketing deal. They didn't have to merge just to cross-sell power credits.

  10. Re:Divorced Talulah Riley again? by Guy+Harris · · Score: 2

    You compare a small niche car enterprise

    You mean the company that is outselling BMW and Mercedes in the luxury car market? That niche company?

    The company whose arguably mid-size luxury sedan is outselling BMW's and Mercedes' large luxury sedans, yes.

  11. Re:Tesla shoud do something... by wyHunter · · Score: 2

    Except environmentalists have forced destruction of many hydroelectric installations because of the 'damage it does to the rivers.'