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SOC discrepancy between ABRP & TSLA Nav

Bug Reports

I recently did a road trip from Michigan to Florida in my 2020 Model X and could not get the ABRP SOC prediction to match my Tesla, which always was more accurate. I used the live connection, added 500 lbs extra weight, and manually entered the exact same destinations and charging stops as the car. No matter what I did ABRP always showed a much higher arrival SOC initially and then would start to tick down and be closer to what the TSLA showed the closer we got to the destination.

How can I make ABRP more accurate from the start?

Where does this happen?
ABRP version number (found at bottom of settings menu)
Posted by James Goodell ·
Status: In Progress4 comments

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Comments4

  • Bo (ABRP)

    Team•

    Jan 5

    Thanks for reporting! I have reviewed your recent plans and your saved vehicle data and it all looks reasonable - reference consumption looks fine, speed factor, battery degradation (at 7%) - all look as one would expect.
    Were you driving with ABRP active in the phone (in driving mode) during your trip? Do you have any particular date and time (or destination) we can dive deeper into?

    • James Goodell

      •

      Jan 5

      I was using my iPad in driving mode. I didn’t save any time stamps or pics from the car UI. Can I assume a time stamp, screen shot from ABRP, and a pic from the car UI would be enough for you to trouble shoot further? Next time I go on a trip I’ll make sure and take notes.

      I just stopped paying attention to it on the trip home because it was off by too much. I want to say it would be off by as much as 9 or 10% soc some times. The closer to destination we got the closer ABRP got to matching the car.

      • Bo (ABRP)

        Team•

        Jan 8

        We have deep dived into especially older Teslas where the battery degradation seems to be estimated wrong in ABRP; work is ongoing to create a better estimation to fix these range estimation issues. So we are on it.

        • Bo (ABRP)

          Team•

          Jan 11

          We have found an issue in the Tesla API which seems to report raw battery capacity instead of usable capacity - your battery is mostly likely 6 kWh more degraded than we estimated.
          The new (and deployed) way of estimating battery degradation requires you to drive and consume a total of at least 50 kWh to give a better estimate of your remaining usable battery capacity.