Just curious if anyone has seen a massive loss in mileage lately? My Model Y (2020) was at 512km (318 miles) at 90% charge when I first got it in September. Now, it's down to 405km (252 miles) at 90%. The Tesla repair shop says that's completely within range of a normal battery. I call bullshit. I've lost over 100km of travel. Seems unacceptable to me. Anyone else have this issue? I feel like it happened after an update.
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Significant loss in mileage
- Thread starter EvilEmre
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- battery life charge distance
Gadget63
Member
That doesn't seem right. I had a 2018 M3 for 2 years and no way did I experience that kind of loss. I went from 315 at full charge to 305 at full charge when I traded it in for my MY
The model 3 and model Y have the exact same battery, so everything related to this question for model 3 is relevant to model Y.
Here is a 35 page thread in model 3 section discussing the battery maintenance system and how it can get out of whack:
How I Recovered Half of my Battery's Lost Capacity
Like many others, I have been concerned with loss of 100% indicated battery range on one of my Model 3s. My P3D (build date 9/13/2018, delivery date 10/8/2018) had gotten down to 270.3 miles at 100% charge on January 20, 2020, at about 30,700 miles, which is a loss of 40.8 miles since the car...
teslamotorsclub.com
here is a 100+ page thread on this topic of "battery range, whats expected"
Range Loss Over Time, What Can Be Expected, Efficiency, How to Maintain Battery Health
i bought my model 3 in aug 2018. After the software upgrade I only got 316 miles when charged to 100%. Last night I got only 312 miles from 5% SOC to 100%. A 4% degradation within 10 months? Have others degraded similarly?
teslamotorsclub.com
TL ; DR for the first thread = If you have a specific charging regimen that you developed because of reading here that you need to charge to 82.445622% but only if cloudy outside and on a thursday, maybe try just setting it to a couple different percentages and let it sit for a while.
TL ; DR for the second thread, yes this is normal, expected, etc, and you likely have not lost 100km of travel.
Watts_Up
Well-Known Member
Basically, a % value and a range give only an estimate of the battery condition based on previous usage and other factors such as temperature.
So if you only charge and discharge the battery by a small amount, the result will not be very precise.
Cells need to be balanced to get maximun capacity, this can be obtain by doing a full discharge and low speed recharge.
Also the battery capacity degradation has been reported been higher the first year.
A more precise evaluation would be to measure the energy produced,
such as the distance at constant speed from (close to) 100% until depletion (close to 0%).
And then to measure the energy needed to recharge the battery to the initial value.
Doing this, may be every 5,000 miles, could be a good way to monitor the battery capacity degradation.
What I could recommend is to use the ODB2 based Scan My Tesla App to get the original and current battery capacity values.
So if you only charge and discharge the battery by a small amount, the result will not be very precise.
Cells need to be balanced to get maximun capacity, this can be obtain by doing a full discharge and low speed recharge.
Also the battery capacity degradation has been reported been higher the first year.
A more precise evaluation would be to measure the energy produced,
such as the distance at constant speed from (close to) 100% until depletion (close to 0%).
And then to measure the energy needed to recharge the battery to the initial value.
Doing this, may be every 5,000 miles, could be a good way to monitor the battery capacity degradation.
What I could recommend is to use the ODB2 based Scan My Tesla App to get the original and current battery capacity values.
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Yeah, I'm calling bullshit. 318 miles @ 100% SoC maybe, no way at 90% SoC.
Brand new user posting obvious FUD.
Brand new user posting obvious FUD.
People seriously need to just switch its setting to show battery percentage rather than miles/kilometers... Life is much easier that way...
roblab
Active Member
Unless your highway miles are being done at 90 mph. And even your city miles can go up if you drive gently from the stop light, etc. The range numbers are calculated at speeds closer to 60.
Correct. No way this guy was getting 318 miles @ 90% SoC. That's obvious BS so this battery degradation complaint is FUD.
iamnid
Active Member
I don't think OP is lying, I just don't think they understand how the estimate works. The numbers shown vary SIGNIFICANTLY based on how you've been charging etc. I haven't had my Model Y long enough to experience it yet but I've certainly seen the numbers vary by 20+ miles on our Model 3 SR+. A few long cycles (down to less than 10% and then back up to 90%) seems to fix it where it shows a number closer to the rated range. In my experience, this seems to happen when I go through periods of very little discharging before recharging.
maximus96
Member
divide 72500 by whatever your lifetime wh/mi is, that is your max range at 100%
to achieve 320 miles of range, you'll need to drive it at 226 wh/mi...which is doable if its all flat city streets
to achieve 320 miles of range, you'll need to drive it at 226 wh/mi...which is doable if its all flat city streets
I try to take the fun way (up and down mountain roads) and regularly get <230 Wh/mi. I think my car is liking the warmer weather, even though I'm using AC. I'm sure I'd get even better efficiency if I was stuck in stop-and-go urban traffic.
Hate it or like it, if you are serious about monitoring battery usage, efficiencies and phantom drain, Teslafi has done a remarkable job keeping track of it all.
Saw this article that may help with the loss of range, looks a bit tedious but should work.
insideevs.com
Learn How To Recalibrate Your Tesla Battery To Show Correct Range
Sometimes, due to improper charging habits, a Tesla’s battery can have calibration issues. In turn, these calibration issues can result in battery degradation.
insideevs.com
Need more info before we can make a proper diagnosis:
1) ambient temps/season when car was purchased
2) driving history wh/mi since car was purchased
3) current ambient temps/season and driving habits
4) when was the battery fully depleted and recharged to 100%?
I ask these because as a MYP owner with 37k miles, I was getting 310 miles on a 100% charge and about 280 on 90% - as of right now, it depends on my driving habits but I get anywhere from 255 at 90% to 265 right now after 37k miles.
1) ambient temps/season when car was purchased
2) driving history wh/mi since car was purchased
3) current ambient temps/season and driving habits
4) when was the battery fully depleted and recharged to 100%?
I ask these because as a MYP owner with 37k miles, I was getting 310 miles on a 100% charge and about 280 on 90% - as of right now, it depends on my driving habits but I get anywhere from 255 at 90% to 265 right now after 37k miles.
iamnid
Active Member
Here, this should help OP out:
insideevs.com
Learn How To Recalibrate Your Tesla Battery To Show Correct Range
Sometimes, due to improper charging habits, a Tesla’s battery can have calibration issues. In turn, these calibration issues can result in battery degradation.
insideevs.com
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