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Nice, thanks for sharing the data @kelvin 660 . However, as a new LFP M3SR owner I'm also curious what your charging habits have been? Are you following Tesla's recommendation for charging daily and at least 100% once a week?So, my battery capacity has degraded by 51.46 ÷ 53.97 = 0.953 or 4.65% (or 2.33%/year). This result is also confirmed by TeslaFi’s Battery Degradation Report attached.
Since Jan I'm on IO and normally fully charge to 100% every 4 to 5 days. Before I was on GO and charged every 3 to 4 I never let it sit at 100% for more than 4 hours.Nice, thanks for sharing the data @kelvin 660 . However, as a new LFP M3SR owner I'm also curious what your charging habits have been? Are you following Tesla's recommendation for charging daily and at least 100% once a week?
I thought with the range increase to 325 miles, that should be where you start the degradation calculation. I was asking the question in another thread also if older M3LR all got the range update to 325 miles. I have a 18 M3LR abs at 100% showed 300 miles today.Not LFP, but our Model 3 LR is reporting 296 miles vs 310 miles from new. That’s under 5% in 30k miles.
However, tbh, it’s been all over the shop over the years and I take the so called reported mileage’s calculated by whatever method with a large pinch of salt.
View attachment 980963
So what’s changed? Combination of events. Couple of firmware update issues (confirmed by Tesla, leading to), Tesla resetting the CAC (ie resetting BMS) and possibly a change in charging regime where since moving to IO, we allow the battery SoC to drop more before charging. It use to be little and often, now it’s a bit more of a charge and less often.
But I’m expecting it all to go south over winter again. Last winters dip coincided perfectly with winter tyre change.
But these values are more about how good a job the BMS does at guessing/estimating the stored capacity than anything concrete about battery degradation. And as I understand it, getting within 10% of true value is pretty good going.
Unless you have the data from new it’s a problem to really know the degradation. The mismatch between the capacity reduction and the “range” reduction is something that I see with Tessie as well. Unfortunately I don’t have my original numbers either as I only started using Tessie in late 2022 though the car is from 2019 (not LFP).Guys just a quick question.
I picked up a second hand M3 LFP 60kw with 20k miles 72plate.
Tessie shows me that my usable capacity is 57.4 and gives me degradation of 4.5%.
My full charge is 263 miles out of 278 when new.
Which one is true.
I thought the usable capacity has always been 57.5kwh?
I really think these batteries either are affected by calendar ageing only or are software programmed to display that range.
How can I check the original net capacity?
Tessie won’t be right unless it gets lucky. It is extrapolating rounded numbers to try and come up with a figure.Guys just a quick question.
I picked up a second hand M3 LFP 60kw with 20k miles 72plate.
Tessie shows me that my usable capacity is 57.4 and gives me degradation of 4.5%.
My full charge is 263 miles out of 278 when new.
Which one is true.
I thought the usable capacity has always been 57.5kwh?
I really think these batteries either are affected by calendar ageing only or are software programmed to display that range.
How can I check the original net capacity?
One way of finding out the battery capacity is to use this method,Guys just a quick question.
I picked up a second hand M3 LFP 60kw with 20k miles 72plate.
Tessie shows me that my usable capacity is 57.4 and gives me degradation of 4.5%.
My full charge is 263 miles out of 278 when new.
Which one is true.
I thought the usable capacity has always been 57.5kwh?
I really think these batteries either are affected by calendar ageing only or are software programmed to display that range.
How can I check the original net capacity?
Have had my M3 about 3 weeks and I'm seeing some DIY noise dampening projects in my future...Fingers crossed as I'm putting close to 180-200mls a day ;*)
Just did a 400 miles journey from London to Leeds and the car returned 192wh/ml at 60+ mph. Temperature outsid 7C.
So efficient with heated seat and steering and the fans at 18C ;*)
Love the car, I just need some noise insulation but there are no perfect things in life.
I've been following this car, as its the same age as mine but it has done a lot more miles (144,133 miles) and its degridation is almost the same as mine!Fingers crossed as I'm putting close to 180-200mls a day ;*)
Just did a 400 miles journey from London to Leeds and the car returned 192wh/ml at 60+ mph. Temperature outsid 7C.
So efficient with heated seat and steering and the fans at 18C ;*)
Love the car, I just need some noise insulation but there are no perfect things in life.
Your doing the calculation wrong. It's not 58kWh plus 2.5kWh buffer. Your car started with something like 60.1kWh when new (check SmT for acurate value) and you now have a 58kWh battery (this includes the 2.5kWh buffer), so you have lost about 3.6% of your battery.Installed Scan my Tesla as well and it's reported as 58kwh usable plus 2.5kwh buffer.