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Supercharging vs Urban Chargers

Discussion in 'Charging Standards and Infrastructure' started by TrevTremaine, Jan 11, 2018.

  1. TrevTremaine

    TrevTremaine Member

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    OK, so from my understanding of it, the urban chargers will help increase the rollout of chargers being installed quicker than if it continued to solely be SuperChargers.

    My questions has to do with the differences therein:
    1. What are the significant differences between the two types?
    2. Does the Urban Charger actually utilize the Dual Chargers now being installed into Model Ss and Xs by default?
    3. Does that mean those who don't have those Dual chargers will be limited in the charging rate?
    4. What are the differences in time frames to charge on each type of charger?
    5. Where is the documentation or can someone point me to a decent article explaining it all?
    I'm asking as there are some urban chargers being installed nearby, and I'm wondering how they're going to be best utilized - whether to do a full charge or boost charge enough to get to a final destination.

    Thanks!
     
  2. TexasEV

    TexasEV Well-Known Member

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    Lots of confusion apparent in your questions.

    Urban chargers are just superchargers with lower peak power, actually not much less than the first superchargers introduced in 2013. They’re still superchargers, and as such have nothing to do with the charger in the car. Superchargers deliver DC to the battery bypassing the onboard charger. The car charger is for connecting to AC charging (outlet, J1772, or HPWC).

    The currently available cars do not have “dual chargers”. That was an option in the early Model S, which came with one 40A charger and had option for a second for total of 80A. The current cars have a single charger of 48 or 72A. Again this choice has NOTHING to do with suoercharging.
     
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  3. BerTX

    BerTX Active Member

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    The other difference is that the urban chargers are not shared power between two stalls. The full (although as @TexasEV says, lower) power goes to whichever stall you pull into. Presumably this is simpler, but also eliminates a lot of confusion and frustration for those who want to have a better idea of how long they will be charging.
     
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  4. Snow Drift

    Snow Drift Slip Start: [Activated]

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    Keep it simple: It’s about half the speed.

    Normal SC has max 120 kW
    Shared Normal SC splits, so 60 kW (actually variable)
    Urban SC has max 72 kW (no sharing allowed)

    So basically, the Urban version is about the same as using a Shared Normal SC, which is almost half the speed of an unshared Normal SC.
     
  5. BerTX

    BerTX Active Member

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    #5 BerTX, Jan 13, 2018
    Last edited: Jan 13, 2018
    Mmmm, no. The split is not even -- the first car at a split SC gets whatever it needs, and the second car gets whatever is left There are times that the split system will be faster, and times when the single system will be faster, if you are the second car plugging into the split.

    Throw into that the fact that small-battery cars charge at a slower rate, and cars that supercharge too frequently may have their charge speed reduced, and it is a real mish-mash of factors, meaning you have no idea how long it will take to charge if you are the second car in a split.

    Part of the idea of the urban charger is that you will get more predictable charge times.
     
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  6. Snow Drift

    Snow Drift Slip Start: [Activated]

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    If one car goes to a normal SC they can get up to 120 kW.

    If one car goes to an urban SC they can get up to 72 kW.

    If you would be eligible for 73-120 kW it would be better to use a normal SC with just one user.

    Add a second user to a normal SC and the scenario changes and gets complicated.
     
  7. Ray95120

    Ray95120 New Member

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    Several posts above have mentioned "what the Tesla needs" in determining the A/B split at at superchargers. What exactly determines what the Tesla needs?

    I've noticed on my new S75 that the charging might start at 170 mph then gradually drop to half that amount even tho it is well below 90% charge and even when there is no vehicle on the other half of the split.

    This variability really make it hard to plan for charging time when traveling.
     
  8. TexasEV

    TexasEV Well-Known Member

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    Well below 90% charge is still well into the charging taper!

    Also be aware that the charging mph shown is not the instantaneous rate, rather it’s the average for the charging session. The kW shown is the instantaneous rate.
     
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  9. Rocky_H

    Rocky_H Active Member

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    o_O Uh, yeah...that's what his wording "(actually variable)" meant.
     
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