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Supercharging cost and charger efficiency

Discussion in 'Model S: Battery & Charging' started by whttiger25, May 10, 2017.

  1. whttiger25

    whttiger25 Member

    Joined:
    Jun 25, 2016
    Messages:
    407
    Location:
    Oakland, CA
    Living in a state for which Tesla charges for Supercharging based on kWh (California, $0.20), and preparing to take delivery of my new vehicle (after saying goodbye to my S with free supercharging) I have two questions I hope someone with experience paying for Supercharging can answer.

    1) Is the rate based on kWh delivered to the car's battery, or used by the chargers? I'm not aware of exactly what the efficiency of a Supercharger is but I assume it isn't 100%.
    2) Is the rate taxed, or do you just pay the flat rate, $0.20 * kWh?

    Thanks!
     
  2. Blup85

    Blup85 Member

    Joined:
    Oct 26, 2016
    Messages:
    202
    Location:
    Chico
    I'm guessing here, but from what I can tell all reporting happens from your car, not the supercharger. So it would actually be "delivered" KW. The new PGE rate tariff for sub-metering of EV chargers allows the owner of the public/private charger to recover costs or even charge overhead (which was not allowed until recently), which is why some locations used to charge per/hour rather than KW. Semantics really.
     
    • Like x 1
  3. Sonny Daze

    Sonny Daze Member

    Joined:
    Oct 21, 2016
    Messages:
    820
    Location:
    DC
    Has anyone even paid for Supercharging yet? I got the impression that no one has used up their annual 400kWh allotment yet.
     
  4. whttiger25

    whttiger25 Member

    Joined:
    Jun 25, 2016
    Messages:
    407
    Location:
    Oakland, CA
    Hmm...cars ordered after Jan 15 right? I assume someone has used more than 400kwh by now...
     

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