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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.

3 of 81 comments (clear)

  1. 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.

  2. Re:Tesla shoud do something... by CanadianMacFan · · Score: 1, Informative

    Maybe the US should clean up its electricity generation. The car itself isn't directly responsible for any emissions. Hydro power is claimed to be a clean form of electricity because fossil fuels aren't burnt but methane is release from decaying plant matter behind the the dam.

  3. 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.