The 62kWh Battery Topic

[dmacarthur]

Wow! can I

quote

you on that! thanks!

[SageBrush]

Never mind

[DougWantsALeaf]

Sage

While I agree with your Leaf value statements in terms of use case (mainly sub 200 mile journeys, limited DC needs, highly discounted purchase+fed credit, no additional ICE needs, etc..) as the sweet spot for the Leaf Plus, I continue to see evidence showing the M3 battery degradation profiles not really being any different then the Leaf Plus (its hard to find enough data points for Niro/Kona and Bolt is now kind of forfeit with the software limitation). Teslafi, seems to confirm that as well.

You can find dozens in the Tesla forums, but here is one youtuber I like because of his earnest approach to his tests.
https://youtu.be/7XdyOxB9n8c

It feels like/appears the late 2019 M3 and later saw a widening of battery suppliers and quality of the smaller packs in terms of degradation curves has some increasing variation...or so it appears.

So I hope your M3 has capacity for a 2 sigma loss in range/capacity and still stay within your needs. (in jest)

[SageBrush]

So I hope your M3 has capacity for a 2 sigma loss in range/capacity and still stay within your needs.

I hope so too.

Figuring out degradation in my car is something of an assumptions game because Tesla sandbagged the range when the car was first released. EPA *testing* (not the window sticker) reported 323 miles and my car now reports in the 314 - 317 range, so perhaps ~ 2% - 2.5% degradation in 2.5 years although in the last year the range has not decreased.

As for the anecdotes you love to find, we have discussed them before. Some charging routines lead to poor BMS calibration. There is little reason to think the outliers are anything but artefacts.

So I'm pretty confident in saying that the 2 sigma annual degradation is no more than 2% a year in the Model 3, and my car is fairing much better -- perhaps 0.5% a year after the first year. I'll have more confidence in my car's degradation rate in a couple of years ... if I continue to monitor. If there is no degradation next year either I'll just call it an issue for the history books and check the range if I ever decide to sell the car.

I've thought more than once about swapping the car for a 400 mile Model Y when that car comes out and continuing to buy used 1/2 cars for my wife since that easily covers her use case, but I like my car too much to be practical about it. I think it more likely that I'll replace 'her' LEAF with a future Model Y and keep the Model 3 as 'my' car.

[DaveinOlyWA]

Sage

While I agree with your Leaf value statements in terms of use case (mainly sub 200 mile journeys, limited DC needs, highly discounted purchase+fed credit, no additional ICE needs, etc..) as the sweet spot for the Leaf Plus, I continue to see evidence showing the M3 battery degradation profiles not really being any different then the Leaf Plus (its hard to find enough data points for Niro/Kona and Bolt is now kind of forfeit with the software limitation). Teslafi, seems to confirm that as well.

You can find dozens in the Tesla forums, but here is one youtuber I like because of his earnest approach to his tests.
https://youtu.be/7XdyOxB9n8c

It feels like/appears the late 2019 M3 and later saw a widening of battery suppliers and quality of the smaller packs in terms of degradation curves has some increasing variation...or so it appears.

So I hope your M3 has capacity for a 2 sigma loss in range/capacity and still stay within your needs. (in jest)

I am gathering data to (throwing out almost as much as I gather...) and from what I can tell, both follow the same patterns but the LEAF has roughly 33 to 75% more degradation during its break in period lasting 12-18 months. After that, they appear to be the same losing ~ 1% a year.

[DougWantsALeaf]

Looking forward to seeing that data. Any signs of our first bar loser?


GM's new commercial is pretty funny. Taking on Norway.

https://youtu.be/mdsPvbSpB2Y

[goldbrick]

I didn't know Audi was the leading EV brand in Norway, or that they had a sense of humor

https://youtu.be/otsK2M4tQI0

[DougWantsALeaf]

I love battle. Leaf still has highest overall EV sales in Norway, but Etron has had the highest yearly sales the last 2 years.

[DougWantsALeaf]

Ok, my SV+ (may 2019 build) just finished its quarterly, and in spite of our single digit weather, the adjustment went UP. .07-.08% (to 93.36% SoH). First cold weather increase. I did charge to 100% 1 tume during the quarter. No clue whether that helped at all or not. I do DC charge this car maybe once a week.

https://docs.google.com/spreadsheets/d/ ... p=drivesdk

[DaveinOlyWA]

Ok, my SV+ (may 2019 build) just finished its quarterly, and in spite of our single digit weather, the adjustment went UP. .07-.08% (to 93.36% SoH). First cold weather increase. I did charge to 100% 1 tume during the quarter. No clue whether that helped at all or not. I do DC charge this car maybe once a week.

https://docs.google.com/spreadsheets/d/ ... p=drivesdk

Nice. What was the change from quarter to quarter (day after previous adjustment to day after this adjustment)