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

[800v]

note: I got another taycan (2020 Turbo S) recently, so this is the first SOH report for that car. Always scary to buy without being able to test the battery but fortunately the SOH looks good


1) Delivery SoH: unknown
2) Current SoH: 91.95%
3) Current mileage: 3700mi
4) kWh DC charging: unknown (but probably less than 200kWh)
5) Build date: July 2020

cold climate use (Seattle/New York)

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[pteron]

1) Delivery SOH 91% (PWIS report)
2) Current SoH 91.57 (reported by Carscanner)
3) Current mileage 11200 km
4) kWh DC charging (assume remainder at home or work/destination EVSE) - not known, I just got the car
5) Build date (or just MY if you're not sure) MY2024 but old version

Taycan GTS

 

[Gino]

NOTE: I WILL UPDATE THE CHART HERE AS MORE DATA IS ADDED VS CONSTANTLY REPOSTING BELOW.


These data to date from 93 cars with 224 readings from over 20 countries worldwide, whilst clearly not a statistically robust sum, are interesting nonetheless and some trends developing - in particular the known slightly higher degradation of SoH in hot climates (my primary interest).

The SoH% is believed to be, for example if we just take the 'published press' values, a % of the usable 83.7kW of the Performance+ 93.4kW capacity battery.

However 'real world' consumptive tests (e.g. #2 and insight provided by @rs38 here #38 ) suggests that Porsche were being conservative and the actual 'usable' unbuffered kW are closer 86.7kW.

Note a relatively consistent hot to warm climate more degraded SoH numbers. Cold country SoH's appear to straddle hot/warm and cool climate trends but numbers not statistically significant as yet.

I have placed 'error' bars of +/- 2 percentage pts. for every reading - this should be considered more a measure of observed variance especially after battery 'balancing' is performed as reported by a number of forum members and myself. So more correctly it s representative of the Soh range at any given time about a mean Soh value -2% on the high end and a +/- 1% being perhaps more typical.

Finally thought I'd post these two useful video links on battery degradation and how to minimize it (first originally shared by @Scandinavian) on optimal charging strategies towards preserving Soh over time by Dr. Jahn of Dalhousie University - excellent (albeit lengthy) discussion with truly relevant advice and 2nd from the Admin here on our forum:

This plot another way to visualize the rate of loss of SoH:

Zoomed to bulk of data:

Reference for climate zones in table:

I am also adding the entire AC/DC post-charge range prediction history of my car for those interested in long term trends including winter - summer variations etc - of course my car in a hot climate. Predictions are just that and not considered indicative of actual consumptive range.

Possible trends emerging (not yet statistically valid) for SoH retention in colder vs hotter climates - Li ion batteries generally do not like heat stress so do not do as well in very hot climates.

Here is the average trip data from your MyPorsche or Web Site data lists - remember these numbers are highly generalized in their own way being 1) averaged over a trip length, 2) the range her his simply calculated from the reported average miles per kWh attained regardless of trip length and the average applied to a fully (1005) SoC to guesstimate a max. range. All sorts of variables can effect that estimated range both positive and negative is again just a guide:


'Raw' averaged consumptive data from my car for it's entire use history:

And a simple calculation to output a maximum range using the reported average mi/kWh per trip (see provisos above):

And here is every charging session (might be missing 2 but checking!) for both at home AC and on the road DC charging in kW into car:

And a overly simplistic (think most negative calculation for range as of course near 80-90% of my trips are dominated by short and truly inefficient driving metrics).

If I focused only on the longer more efficient trips I see far better efficiencies in the range of 2.6-2.9 mi/kWh.

________________________________________________

Here is a recent addition (June 2023) from another years worth of data at odometer ca 11,000 miles from Forum Mbr. @TXAG - hopefully doesn't mind me copying here from his post in this thread #37 - another way to display SoC and PCM predicted ('Guessometer') Ranges:

Climate Zone = Hot
Model = 2022 RWD Taycan with PB+
Mileage = ca 11,000 Miles

Some external data from these links:

https://www.geotab.com/blog/ev-battery-health/
https://www.geotab.com/blog/ev-range-impact-of-speed-and-temperature/
https://www.geotab.com/blog/ev-range/

Here are some addl. variables that were documented in a much larger dataset involving non-Porsche EVs (links above) which clearly indicated excessive use of DC charging in these same hot climates has a further negative impact on SoH over time - the first chart's Level 1 charging is not really relevant as extremely few of us would use a std. wall outlet to charge our car! The Level 2 charging curve is relevant but our data suggest more of an impact than for the population of cars in this story;

An envelope of all data - the lone Porsche data point appears optimistic for most i.e. 5 of the 10 forum cars are below 91% SoH at under 20K Miles (vs 91% at 62K miles on the Porsche Marketing car) - however, as pointed out by @rs38 , there is clearly potential for 1 to two percentage points seasonal variation which is not universally represented in our data to date.

SoH plotted against model year and build date - don't have exact months for many of the German Forum and some of teh US Forum cars (hence couple of rows in data) but fairy clear trends.

______________________________________________________________
How many of you asked for or were provided data on the SoH of your PB+ battery on delivery?
I certainly did not have this on my delivery list to ask when I got mine , but would be useful to set a baseline if that data available.

Here is a readout of my current SoH which may or may not be an entirely accurate record of the true SoH. Nonetheless it would be interesting if all those who have a proper OBDII could read off their SoH and mileage to start to see if there are trends pt. forward with again the proviso that we first might need to establish how accurate these OBDII snapshots actually are.

TBH I thought my SoH would be higher considering I only have 4000 miles or so on the clock and only ca 300 kWh of direct 'fast' charging at EA stations to date - but I am entirely ignorant as to what the delivery SoH starting pt. should be.

So at a minimum say share:

1) Delivery Soh - suspect very few if any actually have this?
2) Current SoH
3) Current mileage
4) kWh DC charging (assume remainder at home or work/destination EVSE) - see #3 below on how to obtain.
5) Build date (or just MY if you're not sure)

For me:
1) unknown
2) 92.7%
3) 4000 miles
4) 303 kWh
5) Oct 2021

Could add # times charged to 100%, how often charge dropped below 20 or 10%, and more but asking a lot already!

Cheers, C.

PS: I'm using the Vgate's vLinker MC+ OBDII with a Bluetooth 4.0 connection to the Car Scanner iOS app.

I appreciate all this information but for my use case over the last year only charging with my 120V AC Porsche charger @ 1.2kW has resulted in recovering back the range I thought I lost in the previous year using DC fast charging for the first 6K miles. I was getting 205 miles when charged to 100% in year 3. Now I have been charging exclusively using AC 120V 1.2kW for the last 4K miles an I get 225 using normal mode & 235 in Range mode.
This is higher range than when I bought my CPO back in late 2023.
I have to believe once I stopped using DC fast charging that the amount of heat my battery has experiences for the last 8 months has been dramatically reduced even though I am in a hot climate in Southern California.
I am using the most gentle charging method which is fine for my low mileage driving habits of less than 150-200 miles per week.
I typically charge to 85% and plug it in every day even if I’m only at 70%.
I top it off every day to 85% and one a week I charge to 100% to check total range.
So far it seems as though my battery is enjoying slow charging with far less heat applied to the battery than DC fast charging.

 

[ddmateos]

1) Delivery SoH: unknown
2) Current SoH: 84.5%
3) Current mileage: 63000km
4) kWh DC charging: unknown
5) Build date: Sept 2021

Taycan 4S

 

[Scandinavian]

Latest update on SoH.

1. Delivery SoH unknown
2. Current SoH 89.3 %
3 Current mileage 75 900 km.
4. kWh DC charging : 80 -85 % DC charging at > 250 kW!
5. Build date Jan 2020.

Latest SoH readings after a 8000 km road trip with nearly 100 % DC charging.
Quite pleased to see the SoH hovering around the 90% mark for my use case, long distance driving with mainly ultra fast DC charging.

 

[tchavei]

Update

Km: 58000
SoH: 86.74%

Cheers
Tony

 

[tchavei]

Seems I'm the last one to care

Km: 60000
SoH: 88.01%

Cheers

 

[Bognar67]

You are not alone...

km: 60,000
SoH: 90,3%
Exactly the same as at 55k km reading.

 

[Scandinavian]

No you are not alone to keep reporting (please continue)

Here is my data
1. Delivery SoH unknown
2. Current SoH 89.3 %
3 Current mileage 78 400 km.
4. kWh DC charging : 80 -85 % DC charging at > 250+ chargers
5. Build date Jan 2020.

Overall the degradation seems to have slowed down very much and the battery responds quite well to recalibrations, regaining 1 or 1.5% at times. Quite stable at this level now it seems

 

[bsclywilly]

92% @ 16k miles
91.3% @ 31.5k miles
89.8% @ 42k miles

Latest:
88.5% @ 60k miles

 

[D00notD00d]

When Porsche supply a Battery Health cert using the current scanned SoH value, rather than one taken using the balancing steps (discharge to 1/2%; idle for 6.5h plus; charge to 100%; idle for 6.5h) they caveat the accuracy of the results to within plus or minus 5%.

 

[tchavei]

Another update

Km: 62000
SoH: 88.39%

Cheers

 

[MrJack]

Hi, here is my data
1 Delivery unknown but the car was new
2 Current SoH 84,07
3 Current mileage 107 108 km.
4.Charging at home at 6 KW and in office at 11 KW (mostly finale charge is 85%) - On travel charging on DC charger at near 150 KW
5. Taycan 4s MY2021 with 93 KWh battery.

 

[Montecristo]

Porsche...300.000 km de uso o 15 años,

https://share.google/y6C9HMCDqlTLs7sb9

 

[PrimaBB]

Got my Taycan CS 4S by end of September this year with 22K km. Now I’m at 27400 km.
I know there were cell modules replaced.

Today I connected my ODB2 dongle to get current SoH. That was quite surprising.

My GOM since I got the Taycan never worried me much but that SoH seems too low even for a non calibrated BMS.

I ride EVs since 2017 but I never seen a SoH under 93%

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