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

[SergeyIndy]

1) Delivery SoH = 99.95% (Measured July 1, 2023)
2) Current SoH = 94.62% (Measured October 2, 2023)
3) Current mileage = 1,509
4) kWh DC charging: 1 time during PDI to 100% and 1 time at EA as test to go from 10% to 35%
5) Build date April 2023

1) Delivery SoH = 99.95% (Measured July 1, 2023)
2) Current SoH = 94.36% (Measured November 6, 2023) only 0.26% drop in the last 500 miles
3) Current mileage = 2,000
4) Home charging at 11kW once a week
5) Build date April 2023

*HV Battery sealant recall scheduled for November 14, 2023

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[ron_b]

My current update.
1) Delivery Soh - unknown
2) Current SoH 88.9%
3) 62,109 miles / 99,952 km
4) DCFC 15,111 kWh
L2 8,029 kWh
5) Build date July 2020, Delivery November 2020

Avg efficiency 343 Wh/mi or 213 Wh/km by calculation not cars fictitious reporting.
I had optioned with 20” wheels and always run all season. Grip is plenty for me with 285s in the rear.

Location SF Bay Area, moderate climate

My current update.
1) Delivery Soh - unknown
2) Current SoH 88.52% (one test at 17% SoC, several other measurements 88.27%) so Will claim 88.4% as avg
3) 75,308 miles / 121,269 km
4) DCFC 18,180 kWh
L2 9,780 kWh
5) Build date July 2020, Delivery November 2020

Avg efficiency 342 Wh/mi or 212 Wh/km by calculation after recording every charging session for 3 years ?, not cars fictitious reporting.

Though I have been using battery friendly lately, I just tried a charge yesterday after 130 miles with preconditioning. At 32% state of charge it quickly ramped to 260 kW and then climbed to 270 kW as reported by the Charger. It’s still a beast after three years. ?

I don’t love the 11% loss, but I do love the half a percent loss in 13,000 miles. Reported SoH from Car Scanner.

Location SF Bay Area, moderate climate

 

[Scandinavian]

So here is my update after the battery repair.Two new modules fitted and a new HV Battery control unit. BTW I strongly question the data from the car to Car Scanner!! But this is what is shown!

Car is at 55,420 km now when I drove it home from my local Porsche centre.

SoH. 99.82%

And all cells are equally balanced!

Range at 100% calculates to over 420 km’s!!

Interesting from CarScanner would be that the total battery capacity now woul be close to 87 kWh!
68.9 kWh divided by 78.8 % SoC. = 87.4 kWh???

I just can not believe any of this!

Interesting though is that with a trial of Tronity app, I could see that they estimated my consumption to be 38 kWh/100 km on a trip that the POrsche app reported 19.x kWh/100 km. I think Tronity estimates the battery % consumed of the available capacity, while Porsche reports what the car has consumed. Quite easy to see when the battery trouble started to show now.

@ciaranob I have no idea on what to make of this data in your graphs??

A new update after my two module repairs. The car has now done some long drives and both AC as well as DC HPC charging at Ionity and Tesla chargers. I still do not believe the data that comes from CarScanner since my SoH stays unnaturally high. But below is the data that it now gives

1. Unknown
2. 99.19%
3. 58365 km. (36250 miles)
4. 70% DC HPC and about 900 kWh since repair

Car Scanners estimate would be for a total battery capacity of 75.95kWh/ 89.8% equals 84.5 kWh!

Everything and all data from the car seem quite normal, actual driving range is very good and estimates of charge level at destinations are spot on. The consumption levels have also been lower than before the repair so every thing seems fully ok. I hope it stays that way since we are now heading for some chilly times in Norway over Christmas!

 

[ciaranob]

A new update after my two module repairs. The car has now done some long drives and both AC as well as DC HPC charging at Ionity and Tesla chargers. I still do not believe the data that comes from CarScanner since my SoH stays unnaturally high. But below is the data that it now gives

1. Unknown
2. 99.19%
3. 58365 km. (36250 miles)
4. 70% DC HPC and about 900 kWh since repair

Car Scanners estimate would be for a total battery capacity of 75.95kWh/ 89.8% equals 84.5 kWh!

Everything and all data from the car seem quite normal, actual driving range is very good and estimates of charge level at destinations are spot on. The consumption levels have also been lower than before the repair so every thing seems fully ok. I hope it stays that way since we are now heading for some chilly times in Norway over Christmas!

I'm back and will be catch up on all the new data added here in next few days. Thx for the update .

TBH, not sure what the heck to make of your data !! I too have a hard time believing these numbers but I'd suggest it's not the OBDII thats at fault here i.e. its just a 'dumb' tool that reports/mirrors out whatever data the PCM decides to give it and presumably from the same data source it got prior Soh readouts from. My OBDII readings were identical to the PIWIS readouts I got from Porsche, so I suspect it is how the car/PCM is reporting your SoH and Capacity that may be the 'issue' if indeed it is such!

At a bit of a loss to understand how swapping out a couple of modules can 'reset' the entire Soh history of a battery that had a far lower Soh prior. Would be really good to get an expert opinion on this from any Battery techs here or better still from Porsche themselves.

 

[Scandinavian]

I'm back and will be catch up on all the new data added here in next few days. Thx for the update .

TBH, not sure what the heck to make of your data !! I too have a hard time believing these numbers but I'd suggest it's not the OBDII thats at fault here i.e. its just a 'dumb' tool that reports/mirrors out whatever data the PCM decides to give it and presumably from the same data source it got prior Soh readouts from. My OBDII readings were identical to the PIWIS readouts I got from Porsche, so I suspect it is how the car/PCM is reporting your SoH and Capacity that may be the 'issue' if indeed it is such!

At a bit of a loss to understand how swapping out a couple of modules can 'reset' the entire Soh history of a battery that had a far lower Soh prior. Would be really good to get an expert opinion on this from any Battery techs here or better still from Porsche themselves.

I agree and since I am back in Stockholm with the car, where it broke down, I will contact the garage that did the repair. I want to see if I can get some of their photos of the repair. I will also ask them to do a Health check on the battery.

I think we have to ignore my data taken after the repair. They do not make any sense nor will the bring any value to your statistic.

I will see what I can get and come back on this!

 

[Gru]

did today a cell calibration (?) with some result

- 42840 km
- drove yesterday down to 6%
- went to charge this morning at the office (steady AC 22 kW) with SoC: 3.5% , SoH : 89.28% , batt. energy: 2.65 kWh. cell voltages showed some (minor) differences
- charged up to 85% (at 22kW - about 3hrs), paused it until late in the afternoon when i completed the charge to 100 %. New SoH : 91.57% (+2.29%). cell voltages very close to each other.
Batt. energy now at 79.15 KWh, ie +76.5 kWh, when charger shows 84.54 kWh : that's about 10% loss

before:

after:

 

[ciaranob]

did today a cell calibration (?) with some result

- 42840 km
- drove yesterday down to 6%
- went to charge this morning at the office (steady AC 22 kW) with SoC: 3.5% , SoH : 89.28% , batt. energy: 2.65 kWh. cell voltages showed some (minor) differences
- charged up to 85% (at 22kW - about 3hrs), paused it until late in the afternoon when i completed the charge to 100 %. New SoH : 91.57% (+2.29%). cell voltages very close to each other.
Batt. energy now at 79.15 KWh, ie +76.5 kWh, when charger shows 84.54 kWh : that's about 10% loss

before:

after:

Very interesting - plan to do the same myself esp as the car was sitting for last 2+ weeks with 85% SoC whilst we were in Europe, def not helping the Soh. Very curious to 1) see what my current reading is and 2) if I can improve it to the extent you have recorded.

Have not forgotten to get all the charts updated and will do so asap.

 

[tchavei]

Just dropped off my car at the dealership for a recall (battery sealant and PCM update blah blah blah) and I forgot to pull the stupid OBDII tool out before handing over the car ?‍

I guess the techs/mechanics gonna have a surprise waiting for them when they start working on the car...

 

[ciaranob]

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%

Confused - your post from Sep 28 2023 states that you have done 9100 mies and a then Soh of 91%!

Did you mean to say in your latest post that you've done an additional 767 miles but still doesn't jive with a now 97% Soh - please help to clarify - thx.

 

[bn8959]

Confused - your post from Sep 28 2023 states that you have done 9100 mies and a then Soh of 91%!

Did you mean to say in your latest post that you've done an additional 767 miles but still doesn't jive with a now 97% Soh - please help to clarify - thx.

first post was a demonstrator. Then I got my new Taycan
One of my posts should have been a reading with 10 miles on the clock on delivery day. Thanks!

 

[ciaranob]

first post was a demonstrator. Then I got my new Taycan
One of my posts should have been a reading with 10 miles on the clock on delivery day. Thanks!

Ah thx - missed that!

 

[ciaranob]

@Dr Bob @tchavei @TurboInCold @MurfPT @DougFrisk @gtm @bn8959 @Gubab @SergeyIndy @ron_b

All your data now added/updated - apologies agin for the long delay in doing so - I still need to add some pt. connectors etc. but thought I'd get the raw data up asap.

 

[ciaranob]

@gtm - can I get your current mileage and should I assume your Soh still 90.93 - thx!

@Vim Schrotnock - thx fro sharing your Soh of 92.33 - can I get a current mileage to go with that - most appreciated, C.

 

[DougFrisk]

@Dr Bob @tchavei @TurboInCold @MurfPT @DougFrisk @gtm @bn8959 @Gubab @SergeyIndy @ron_b

All your data now added/updated - apologies agin for the long delay in doing so - I still need to add some pt. connectors etc. but thought I'd get the raw data up asap.

What is a good cadence for updates every 5000 miles? 10K?

 

[tchavei]

What is a good cadence for updates every 5000 miles? 10K?

I have the idea, the more data points, the better.

I'm now checking every 2k km.

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