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Thread: Tesla Supercharger network

  1. #911
    Model S 03182 ElSupreme's Avatar
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    Quote Originally Posted by Enadler View Post
    Actually I believe Superchargers are all Solar powered.
    Well they have solar panels on them. They are all grid powered. But the thought is the solar panels will generate more aggregate power than the superchargers put out over a period of time (probably a year, to average out summer and winter). But if they were solar powered then you wouldn't be able to charge at night, when it was cloudy. That would not we very convenient.

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  2. #912
    P631 hans's Avatar
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    Quote Originally Posted by JRP3 View Post
    No. In fact even the ones with solar panels don't supply the full power from the panels but draw from the grid, the panels just supplement and feed power back to the grid when no one is charging.
    Agreed. I used a online solar PV system calculator to estimate the size of a system that could generate ~90KW, at peak, in California, and its about 9,500 sq-ft. This would only supercharge one car, and only at peak time of day. Given that many of the supercharger locations have 2 or 4 or perhaps more charging spots in the future, they would have to cover many more parking spots than just the ones reserved for supercharging if they wanted to power the whole system from solar. The same problem exists for the idea that the grid connection would be the same capacity for grid to charger as it is the other way from solar panels to grid.

    It is possible to cover the entire parking lot or the roofs on all the surrounding buildings but I don't think the plan is to do all that.

  3. #913
    Senior Member jcstp's Avatar
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    wasn't there mention that those superchargers would be connected to a battery?
    then they would not need high-power connection to the grid!

  4. #914
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    Quote Originally Posted by ElSupreme View Post
    There is the problem that most of these locations would most likely need a larger power feed than they currently have. This service upgrade can be VERY expensive.

    I bet a lot of their Supercharger location requirements is nearby large power feed to tap off of.
    But since they already are in commercial establishments, particularly the service centers, they likely already have 3 phase power, a parking area, and a building so they're well on the way. A green field Supercharger installation has to start from scratch, buy or lease land, put in a new service, and construct the facility.

    It still seems to me that the marginal cost of adding one to an existing Tesla facility would be significantly less than building one from scratch.

    At a sales facility, I'd also think that potential customers seeing and talking to owners charging there would make them feel better and existing owners might wander through the showroom and think about another car or an upgrade.

    As far as completely solar powering a Supercharger, that would seriously not work in many areas of the country, e.g. New England. After the first few days of overcast weather with intermittent sleet I don't think there'd be much charging going on.

  5. #915
    Senior Member JRP3's Avatar
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    wasn't there mention that those superchargers would be connected to a battery?
    then they would not need high-power connection to the grid!
    There was talk of that, but so far none are, and it would raise the cost of the system.

  6. #916
    Model S 03182 ElSupreme's Avatar
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    Quote Originally Posted by RDoc View Post
    But since they already are in commercial establishments, particularly the service centers, they likely already have 3 phase power, a parking area, and a building so they're well on the way. A green field Supercharger installation has to start from scratch, buy or lease land, put in a new service, and construct the facility.
    The real problem is whether or not their copper is fat enough. A single supercharger will pull about as much power as 20-40 houses (wolfram alpha). 100kW is a TON of power to pull instantaneously. Most commercial places won't have thick enough copper.

    In fact you aren't going to bring in that much power on 480 3phase anyway it requires too much copper, you are going to bring in much higher voltage and step down near the supercharge units.

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  7. #917
    Model S - U.S. P - #1649 dmckinstry's Avatar
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    Quote Originally Posted by jcstp View Post
    If they put HPC, asside Superchargers, people can choose fast or fastest charge!
    Would 4 hpc cost more than 4 superchargers?
    I guess once the basics of a supercharger are installed, adding berths will cost +/- same as adding a hpc! no?
    For that matter, I think it would be advantageous for all if one used the supercharger to the point where the charge rate dropped and then go to the HPC to top off while the supercharger would then be available for the next user.

  8. #918
    Senior Member JRP3's Avatar
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    Quote Originally Posted by ElSupreme View Post
    The real problem is whether or not their copper is fat enough. A single supercharger will pull about as much power as 20-40 houses (wolfram alpha). 100kW is a TON of power to pull instantaneously. Most commercial places won't have thick enough copper.

    In fact you aren't going to bring in that much power on 480 3phase anyway it requires too much copper, you are going to bring in much higher voltage and step down near the supercharge units.
    Pretty sure all high voltage lines use aluminum, not copper.

  9. #919
    Model S P2681 qwk's Avatar
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    Quote Originally Posted by JRP3 View Post
    Pretty sure all high voltage lines use aluminum, not copper.
    Yep, aluminium wrapped steel lines.

  10. #920
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    Quote Originally Posted by qwk View Post
    Yep, aluminium wrapped steel lines.
    I'd like a response from someone with AC transmission/subtransmission knowledge, but I believe if they used intermediate feed voltage of 3-4kV, the current would be much lower, and this is a standard industrial feed voltage.
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