navguy12
Active Member
2018 LR RWD 105k km2018 LR RWD 91k miles
296 miles shown @ 100%
310 new, so ~4.5% loss
I’m very pleased
463 km shown @ 100%
499 km new, so ~7% loss
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2018 LR RWD 105k km2018 LR RWD 91k miles
296 miles shown @ 100%
310 new, so ~4.5% loss
I’m very pleased
2018 LR RWD 105k km
463 km shown @ 100%
499 km new, so ~7% loss
Acknowledged.the car hides the initial 24km of degradation. 463km is 11.4% degradation (1 - 463/523km).
the car hides the initial 24km of degradation. 463km is 11.4% degradation (1 - 463/523km).
I googled Ontario. Annual ambient temp 17C, so average battery temp smightly above that ( about 20C or a little higher).Two years since we purchased our M3LR, built June 2021 at Fremont.
When not being used the Tesla usually sits around 50% SOC.
So, I quesstimate about 4% degradation over 2 years?
That is a good observation.Is this due to the 310 vs 325 mile original range?
Not quite.Is this due to the 310 vs 325 mile original range?
69kWh (66kWh usable) vs. starting capacity of ~77.8kWh (74.3kWh usable).296 miles shown @ 100%
67kWh (64kWh usable) vs. initial ~77.8kWh (74.3kWh usable).463 km shown @ 100%
77.8kWh FPWN for 2018/2019/2020 vehicles with LR pack.78.8kwh pack
Perhaps a Loess smooth is preferable to the linear plot.Not enough recent data points to be reliable. Without those last 2 points, if you told me the best fit line was the red one, I'd believe you. You need more recent points.View attachment 953436
Definitely a lot of jumpiness on the estimates. It tends to move in large steps. Reasons for unexpected (non-physical) increases seem to be randomness, weather (temperature presumably affecting the BMS estimates and their accuracy?), and software updates.Perhaps a Loess smooth is preferable to the linear plot.
But it gives a simlar 95% C.I to the linear plot at the right edge:
~74-75.5 kWh at 2 years and 27.5K kms.
View attachment 953505
Haha, I thought about graphing it, but decided not to, that line is falling off a cliff!Perhaps a Loess smooth is preferable to the linear plot.
But it gives a simlar 95% C.I to the linear plot at the right edge:
~74-75.5 kWh at 2 years and 27.5K kms.
View attachment 953505
I googled Ontario. Annual ambient temp 17C, so average battery temp smightly above that ( about 20C or a little higher).
If kept mostly at 50%, the degradation should be about:
2.5 x (square root (24/10)) = 3.87 ~ 4%.
So you’re spot on the plan
View attachment 953429
We'll see! Will report back in a year or two with the latest data. Appreciate all the comments, people. Very informative forum.Below is the square root formula applied:
Datapoint used, 50% SOC juuust below the 25C line, so 2.5% degradation during the first 10 months:
(Assumes the miles per month has ben about the same)
View attachment 953652
Drawn with my fingers on the mobile phone so not exact to the thousand of an inch.
It is probable that the real battery capacity did follow something like my drawn line.
Battery degradation is predictable and contrary to the BMS ups and downs, its a slope slowly reducing the sloping angle.
@brulaz; You probably will be at about 5.5% loss and 73.5 kWh after four years if you continue to use it in the same way.
Yep, as would be expected. Interesting how Tesla always has a pack available which is a good match.so data is in.
Battery is a 77.8kwh battery. 71kwh remaining (464km). 104 discharge cycles, 7369kwh discharge in total. so pack likely has 45-50000 kms on it.
Same here 57% on the MYLR dual motor (Australia May 2023 build) equates to about 300km estimated range. I drive daily and total about 300km/week and charge about 3x week to 57% - only because I don't need more and the estimated range is a nice round number and easy to see if it changes over time. I could charge to 40% and still be comfortable with available rangeLow SOC like 55% works very fine for me
Yep, as would be expected. Interesting how Tesla always has a pack available which is a good match.
Hopefully you’ll have better luck with this one.
Is it possible that they are somehow software nerfed to behave like a "used" pack?Interesting how Tesla always has a pack available which is a good match.