TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

6.2 Prediction & Speeds

Discussion in 'Model S: User Interface' started by sandpiper, Apr 7, 2015.

  1. sandpiper

    sandpiper Active Member

    Sep 25, 2014
    Ontario, Canada
    So, I had my first chance to take a trip with 6.2 yesterday. It started with a 298 km leg in approximately 0 degrees C, but otherwise a nice clear day. I found the range prediction to be inaccurate, and I'm curious what assumptions it's making in it's calculations.

    In my case, it predicted that I'd arrive with 27% of the battery left. In reality I ended up with about 16%. I drove about 5 km over the limit with HVAC off. I was certainly one of the slowest vehicles on the road and so spent the entire time locked on cruise.

    On thing that confused me is that it was predicting a trip time of about 3:50. That's ridiculous for a 300 km trip, where the limits are 65% at 100 km/h and the balance at 90km/hr.

    Is there anywhere where the software will tell you what assumptions it's making for speed and so-on, similar to what EV Tripper Planner provides? Without that, the predictions are a bit meaningless. It would also be nice to be able to dial in a speed factor.

    As it is, I found this new "range anxiety eliminator" to be close to useless. I still needed to watch my estimated range and set my speed as required to make sure that I arrived with a comfortable buffer.

    My two cents.
  2. commasign

    commasign Active Member

    Aug 31, 2013
    Davis, CA
    I have the same questions. My assumption was if the car is stationary when you set a destination, the prediction would be based on speed limit, while if the car was already moving, the prediction would be based on current energy usage. I don't think either is the case. Driving from Harris Ranch SC home, the predicted end SOC kept dropping about 1% every 5 minutes or so despite keeping the car at a steady 70mph (the speed limit). I wonder if the speed offset in the speed assist page factors into the calculation. I.e. if you set speed offset to +10mph, will the predictions assume you drive at speed limit +10mph? Haven't had a chance to test this though. I agree that it would be great if the software would allow you to adjust parameters such as anticipated speed, HVAC usage, desired buffer, etc.,

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.