Battery degradation analysis?

[N54TT]

Update as my battery took another dump. 80% is now down to 237miles...which puts me at 5% degradation in only 7500 miles. Will see if a recalibration does anything.

 

[VT_EE]

I have a 2018 LR RWD (June Build) and am currently seeing 318 mile range at 100% charge with 17000 miles on the odo. That is just over 2% degradation in 10 months of driving. The number does drop a couple miles between when I go long periods between road trips, but goes back up after a few battery cycles. I have no complaints.

 

[golfpilot]

I have 25k miles on my dual motor. Last weekend I was at a supercharger and when it reached 292 the rated range stopped but the car continued to charge. At 292 mile it was charging at 10kw and continued to taper down to 1kw almost 30 mintues later still stuck on 292. AC was off. I don't think I actually have that much battery degradation. Something is wacky with the BMS.

 

[Paddy3101]

I've noticed the same thing. At a 90% charge was getting an indicated 279 miles. (310 at 100%) which was steady since bought the car.
Over the coarse of the last 2 weeks that dropped to 270 miles exactly, (300 at 100%)

P3D+

Suspicious as that numbers seem 'too exact' and the change to be too quick to be a physical, hardware change. Can only be a software re-calibration...

Replying to my own comment!

My 90% charge has now dropped to 265 miles. And wouldn't charge past 295miles at 100% whilst on a trip.

So, basically, it's losing 5miles range every 1000 miles. Or 5% range loss in 3000 miles, so if it continues like this, will fail the 70% degradation before the year is out!

Service Center are going to look at it.

 

[viet658]

2018 LR RWD with about 25k miles. STATS app indicates about 316 miles at 100%.

 

[M423]

today i noticed my 90% is 274 on my LR RWD

 

[gilscales]

I was at 321 miles in march after the firmware update at approx. 20k miles, about 5k more miles has brought me down to 306, not sure why the sudden loss in rated range, maybe it is the bms?
I always charge to 90%, not daily but when I charge, I have a few 100% charges for sure when traveling but I have many more 100% charges before the update and I had went from 313 rated to 310 rated in approx. 20k miles, maybe my charging habits are finally catching up with me? I know others here are far more careful in their daily/max charge levels.

 

[Drivesolo]

I may have the runt-of the-litter. LR RWD, 18.3k miles, received in May 2018. Charged to 100% this morning only seeing 309 and it seems that every 15 minutes or so it drops to 308 and tries to charge back up to 309. Typically charge to 80% except for once a month when I charge to 100%. The highest I'd ever seen was 314 two months ago.

 

[gilscales]

I may have the runt-of the-litter. LR RWD, 18.3k miles, received in May 2018. Charged to 100% this morning only seeing 309 and it seems that every 15 minutes or so it drops to 308 and tries to charge back up to 309. Typically charge to 80% except for once a month when I charge to 100%. The highest I'd ever seen was 314 two months ago.

Nope, mine is at 306, 26k miles

 

[Drivesolo]

Nope, mine is at 306, 26k miles

Let's commiserate together.

But... at the rate I'm losing capacity by the time I get to 26k miles I will probably be lower than you.

 

[electrictorque]

I just charged my 10 months old P3 with 10k miles to 100% yesterday and it showed 304 range but dropped to 302 as soon as I started driving.

Drove 200 miles and had 96 miles remaining.

 

[J M L]

At 8000 miles on my long range dual motor I'm down to 100% charge being 262 miles, and 90% charge being 236 miles. The service center isn't interested in seeing it, because they say it is just a software bug. They've given me homework to only charge from below 40% to 90%.

 

[N54TT]

At 8000 miles on my long range dual motor I'm down to 100% charge being 262 miles, and 90% charge being 236 miles. The service center isn't interested in seeing it, because they say it is just a software bug. They've given me homework to only charge from below 40% to 90%.

For the past couple weeks I stopped charging every night and have been doing some deeper cycles/charges. My 90% has gone up 1-2miles every charge from 266 to 273 so far.

 

[VT_EE]

At 8000 miles on my long range dual motor I'm down to 100% charge being 262 miles, and 90% charge being 236 miles. The service center isn't interested in seeing it, because they say it is just a software bug. They've given me homework to only charge from below 40% to 90%.

15% is pretty bad. Either you have bad battery, or you have buggy BMS software. There is a lot of complaining about this in the Model S forum.

 

[J M L]

For the past couple weeks I stopped charging every night and have been doing some deeper cycles/charges. My 90% has gone up 1-2miles every charge from 266 to 273 so far.

I hope mine starts gaining like that. I've been doing the 40-90% charge cycle for the last two charges, and have been losing 1-2 miles per cycle. It's running again tonight, and based on the charge rate and time left, it's on track to lose another 1-2 miles. I'll see what it's like in the morning. The only real downside to this charge cycle, for me, is that I can't top up with the free charging at work.

15% is pretty bad. Either you have bad battery, or you have buggy BMS software. There is a lot of complaining about this in the Model S forum.

Yeah, those are my thoughts. They told me it must be a bug, because the car isn't reporting any errors. I've not heard of anybody having it this bad on a 3, though. I have lots of battery warranty left, and at the current rate of decrease I'll hit the 70% battery retention warranty in 3 months.

 

[krisseadog]

I have a 2018 LR RWD (June Build) and am currently seeing 318 mile range at 100% charge with 17000 miles on the odo. That is just over 2% degradation in 10 months of driving. The number does drop a couple miles between when I go long periods between road trips, but goes back up after a few battery cycles. I have no complaints.

I have a dual motor LR and at 100% I am at 300 miles with about 10200 miles on the car I picked at the end of September 2018. I just recalibrated twice and got the range to less than 20 miles each time and then charged to 100%. One at a supercharger and another at home. I have supercharged 4 times.

It still says 300 miles and stops charging at that point.

I thought with one of the software updates the range was extended to 325 miles? Even at 310 I am at 3.2% but if 325 then it is 8% which seems high.

 

[gilscales]

I have a dual motor LR and at 100% I am at 300 miles with about 10200 miles on the car I picked at the end of September 2018. I just recalibrated twice and got the range to less than 20 miles each time and then charged to 100%. One at a supercharger and another at home. I have supercharged 4 times.

It still says 300 miles and stops charging at that point.

I thought with one of the software updates the range was extended to 325 miles? Even at 310 I am at 3.2% but if 325 then it is 8% which seems high.

Only the LR RWD was updated to 325 miles range, I have that model with 26k miles and my 100% is at 305 to 306 miles range or approx. 6% degradation, I'm hoping it will slow down now as I understand that the first year suffers the highest percentage of degradation.

 

[electrictorque]

I have a dual motor LR and at 100% I am at 300 miles with about 10200 miles on the car I picked at the end of September 2018. I just recalibrated twice and got the range to less than 20 miles each time and then charged to 100%. One at a supercharger and another at home. I have supercharged 4 times.

It still says 300 miles and stops charging at that point.

I thought with one of the software updates the range was extended to 325 miles? Even at 310 I am at 3.2% but if 325 then it is 8% which seems high.

Mine is pretty identical to yours. 304 @ 100% about same age and mileage.

 

[insaneoctane]

My May 2018 RWD LR has 30K miles and my 80% nightly charge yields 254 miles, which extrapolates out to 318 miles at 100%. I did see the 325 mile firmware bump several months ago...

 

[bedoig]

Mine was very consistent up until last month when I had a sudden 10 mile drop. We'll see if it ever comes back up. Just went on a 2k mile road trip with quite a few reasonably deep discharge/charge cycles (<10% to 90+%) with no appreciable positive impact to the estimated capacity.