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Vampire Drain Measurements

Discussion in 'Model S' started by Haxster, Aug 14, 2017.

  1. Haxster

    Haxster Member

    Apr 4, 2016
    Silicon Valley
    While on vacation, I left our December, 2016 build HW2 90D MS connected through the Tesla Mobile Connector to 240V. The car has ~4,800 miles on it. The charge rate was set to 50% at 5 Amps. Energy Savings was ON and Always Connected was checked. Cabin overheat protection was on (D’oh!), but the interior never got hot enough to turn on the AC (or at least I believe this to be the case with the car in the garage and no high ambient temperatures logged by our weather monitor).

    The kWh meter was set to zero well after the car was charged to 50%.

    Here’s what I observed while periodically checking with the “Power for Tesla” iPhone app:

    1. The “miles” fluctuated from 140.4 (48%) to 146.3 (50%).

    2. The total energy used over 13 days was 8,262 kWh. That’s about 26W/hour. At 315 W/mile, that works out to around 2 miles a day.

    Note: The Mobile Connector uses about 3W in standby. So, the incremental power to charge the car is closer to 23W/hour when the Mobile Connector is always plugged into the wall.

    More details about my home charging setup can be found here:
    13 days.JPG
    • Helpful x 2

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