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🔋 Baseline for HV Battery SoH Performance (Battery Degradation Data by Taycan Owners)

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ciaranob

ciaranob

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Thx all for the continuing updates - still under heavy work load so apologies, responses slow but will def get the charts updated asap - some very interesting results/data!
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MurfPT

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1) unkown
2) 86.07%
3) 37700
4) don have that info on my transactions page but since I have the car I only fast charge like 10times max...
5) august 2021

Taycan turbo stats
 

DougFrisk

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1) 99.82%
2) 99.95% (interesting that it's gone up)
3) 797 miles
4) 50KW DCFC 260KW AC
5) May 2023
 
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ciaranob

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@MurfPT @DougFrisk - great stuff - lagging a bit behind re chart updates but will get yours and prior few uploaded tomorrow - thx all for your patience.
 


gtm

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@ciaranob. I noticed a pattern that might be of interest to you. Left Florida for NJ at 95.0% SoH. 94.49% shortly after arrival. Barely a drop. The next time I checked (3 weeks later) the SoH dropped to 92.96%. No additional DCFC and actually very little driving at all in the interim. Drove back to FL and noticed the same pattern. Left at the same 92.96%, arrived at 92.33% SoH. Again minimal degradation right after the trip. Checked roughly 4 weeks after the trip and SoH had dropped to 90.93%. So apparently each trip resulted in losing 2% SoH but the car's reading/recalculation was delayed. (as an side note: CarScanner shows a current battery capacity of 81.2 kWh. 6% loss from a baseline of 86.7 kWh, not really all that close to the 9% SoH reading drop). Perhaps the car needs time/a slow AC charge cycle or two to recalculate the SoH. Might explain why @Scandinavian reported 99.8 SoH immediately after his battery repair. Curious if his SoH will drop, to reflect that only two modules of the original battery are new, after a week or so.

Just an observation that I thought might be of interest to you as you are the battery statistics king.
 

bn8959

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Mine has now done 767 miles

since I last reported it’s been a few 7kw AC charges, one DCFC (40 to 85% at around 120kW), one 22kw AC charge and one granny (2.1kw) charge.
SoH now showing 97.03%
 
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ciaranob

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Just a quick update as I know i've been totally unresponsive - I am essentially offline in the forum as out of country and deep into a project I am on that doesn't allow for much of any other activity!! My apologies but will def do a full update asap but not before another week plus. Please do continue to share and the data will most certainly be appreciated and uploaded.

Thx, C.
 
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TurboInCold

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I was about to leave for longer drive, and car was to be charged 100%. While in 94%, the onboard 22kW charger got broken and car reported the yellow ”electric system fault”.

Since there are shortage of 22kW chargers, it is estimated to take 3 more weeks until the car will get fixed. The car is standing in high state of charge (94%) out in Porsche service center in below zero celsius degrees (-5’C now) in worst case almost for a month.

I took the previous SoH readings in this month, so I will take new readings once the car is back and report what was the impact to SoH.

Car is Taycan Turbo delivered in June 2022.
 

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Here is an update from my ST GTS ( 5th measurement):
1. 99,8%
2. 93, 85%
3. 15543 miles
4. 1942 kWh fast charging
5. Nov 2022
 

Vim Schrotnock

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@ciaranob . I hadn't looked for the SoC True in a while. The location was changed but it's there. You can see it in the graph in the center of the first screenshot.
IMG_0274.png
IMG_0273.png

The first/main screen shows SoC Display and HR and today they are pretty close. SoC true reads higher at 63.65%. Someone, somewhere deep in the bowels of Stuttgart probably knows how the different readings are derived and what they represent but I suspect we mere mortals will remain in the dark.
I may be misinterpreting the actual data, but if I take the 50.25kWh battery energy and divide it by the SOC (state of charge), I get 79kWh of total battery energy at 100%. I am getting the same reading on my 'repaired' battery where two of the cells were replaced. My total battery energy according to Porsche should be 93kWh. It looks like these figures for some reason are not indicating the total battery energy - is this the case?
 

gtm

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I may be misinterpreting the actual data, but if I take the 50.25kWh battery energy and divide it by the SOC (state of charge), I get 79kWh of total battery energy at 100%. I am getting the same reading on my 'repaired' battery where two of the cells were replaced. My total battery energy according to Porsche should be 93kWh. It looks like these figures for some reason are not indicating the total battery energy - is this the case?
My understanding is that "full" available battery capacity is 86.7 kWh when new (despite Porsche's published spec). The difference between that figure and the 93 kWh is the buffer. If you sort of work backwards from my screen shots: 50.25 kWh battery energy @ 63% SoC = 79.76 kWh theoretical capacity at 100%. At a SoH of 92.33% that works out to 86.4 kWh for my battery new (easily within rounding from 86.7). If you do the same calculation with your current SoH you should arrive at an original available capacity of 86.7 kWh.

Two new cells probably won't increase your SoH much due to cell balancing. @Scandinavian reported 99+% SoH immediately after his battery was repaired (2 new modules). I'm interested to see where his SoH winds up after a week or two. The car seems to need some time/mileage/charging to recalculate the SoH.
 

Scandinavian

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My understanding is that "full" available battery capacity is 86.7 kWh when new (despite Porsche's published spec). The difference between that figure and the 93 kWh is the buffer. If you sort of work backwards from my screen shots: 50.25 kWh battery energy @ 63% SoC = 79.76 kWh theoretical capacity at 100%. At a SoH of 92.33% that works out to 86.4 kWh for my battery new (easily within rounding from 86.7). If you do the same calculation with your current SoH you should arrive at an original available capacity of 86.7 kWh.

Two new cells probably won't increase your SoH much due to cell balancing. @Scandinavian reported 99+% SoH immediately after his battery was repaired (2 new modules). I'm interested to see where his SoH winds up after a week or two. The car seems to need some time/mileage/charging to recalculate the SoH.
I have not had much time to drive the car, but have charged it once up to 80% so no new data really. I also believe that it will change when being used more and charged with both AC and DC, which will occur in the next couple of weeks, all going to plan. So far my total capacity would indicate about 87 kWh and that is not correct with only two modules being changed
 

gtm

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I have not had much time to drive the car, but have charged it once up to 80% so no new data really. I also believe that it will change when being used more and charged with both AC and DC, which will occur in the next couple of weeks, all going to plan. So far my total capacity would indicate about 87 kWh and that is not correct with only two modules being changed
It will be interesting to see where you wind up on SoH in a couple of weeks.
 

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Update

11172Km
SoH increased to 92.58%

No idea why. Cooler weather? Didn't do anything different in the last 1k km. I'm not complaining ?

Cheers
Another update

12000 km

92.58% (it's holding?)

3 charges to 100% as I was enroute.

Cheers
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