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Regenerative Breaking Limited at Moderate Temperature ( 68 F)

Discussion in 'Model X: Battery & Charging' started by beths11, Oct 9, 2017.

  1. beths11

    beths11 THE LONG RANGER

    Apr 30, 2013
    Molalla, OR
    2016, X 75 with 20" tires, starting charge usually around 70 - 80 %. I have a route which I have been travelling for the last 6 months. I have an 8 mile drive from my house to the golf course which is level except for one hill at the very beginning/end of the trip (at my house). I am a conservative driver and the drive has averaged @ 300 Wh/mile with an average speed of about 50mph . Now that the mornings are colder (40 - 52 F) my regenerative braking is limited in the morning. I understand that phenomenon. What has me puzzled is the car will sit for 4.5 hours at the golf course, in the sun and when I return the car tells me the outside temperature is 68 -71 but my regen. braking is still limited. Not only that but my Wh/mile on the way home is in the mid to high 400's. Last piece of information, the drive to the golf course in the am is not long enough for the battery to warm completely enough to have the limited regen. symbols go away. So when I park in the am the dashed orange lines are still showing on the display.

    Ideas? I called the local service center 3 days ago when it first happened. They looked at the logs and found nothing out of order. Today it happened again. I called the main Tesla number and a case has been opened. He suggested I heat the cabin for 10 minutes before starting my trip home, but the cabin is already very warm from sitting in the sun all day,
  2. vandacca

    vandacca ReActive Member

    Oct 13, 2014
    The temperature sensor is likely located some place far from the battery. Sure the cabin and the temperature sensor are nice and warm because it is in direct sunlight, but the battery is likely much colder because it's shaded under the car. So, my guess is that the battery temperature is much lower than the cabin, which is why regenerative braking is limited.

    In winter, it's always a good idea to pre-heat prior to departure, especially if you're connected to power.
    • Helpful x 1

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