Baseline for HV Battery SoH Performance

[ciaranob]

@ciaranob updated readings for you...

Current SoH - 89.28%
Current Mileage - 17,102
0 new DCFC sessions since last update
2 charges to 100% since last update
50-75% is my typical SoC at any given time

Great stuff - behind on last three additions but will get it done today.

Will also redraft the second chart so that contributors can better see their data trends and compare to others.

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[B61]

If my battery dies before 8 years and 160k km's it doesn't bother me.

There’s a RWD 2020, with 160k km (info from last November) with SoH 86%.
According to my dealer, owner is/was charging it on DC only.

 

[ciaranob]

There’s a RWD 2020, with 160k km (info from last November) with SoH 86%.
According to my dealer, owner is/was charging it on DC only.

Yes I loaded that car after you shared previously - I’ll be sure to x-check later today.

 

[B61]

As far as i remember, you added before.
I just wanted to comment @andb wish related to SoH at 160k km.

 

[dropdead]

found one i might buy:

1. Unknown
2. 91%
3. 19,800 miles
4. Unkown
5. 12/21 first registration

it's a 4S CT

 

[Yaibal]

so it’s been a couple of months so here’s an update.


1. unknown
2. 88.39
3. 15,316 Miles
4. Aprox. 80kwh since delivery in 06/23.
5. Build 12/21 initial delivery 2/22

I don’t love to see the SoH dropping more than 2 percentage points. I may try a 100% charge to see what effect that has. I’ve kept the car at 85% charge with the only exception being a dealer visit where they charged it to 100 via dc fast charging.

the other factor is temperature. I live in a warm part of the us. The summer has been miserably hot.

Six months has come and gone! ….here’s an update.


1. unknown
2. 88.39
3. 20,720 Miles
4. Aprox. 180kwh since delivery in 06/23.
5. Build 12/21 initial delivery 2/22

the big takeaway here for me is the SoH is reporting exactly the same as my September update.

The dash currently shows 100% battery. The SoC reported in car scanner is slightly lower. So the is 100% for my battery. Notice the Battery Energy field at the bottom. 76.65 kwh. Now if I multiply the known usable portion of my battery from the factory (83.7) by my SoH (88.39) I get 74 kWh. I’m wonder if the buffer is in play here? Can anyone give me a. Refresher on how the buffer is allocated or utilized?

 

[gtm]

Six months has come and gone! ….here’s an update.


1. unknown
2. 88.39
3. 20,720 Miles
4. Aprox. 180kwh since delivery in 06/23.
5. Build 12/21 initial delivery 2/22

the big takeaway here for me is the SoH is reporting exactly the same as my September update.

The dash currently shows 100% battery. The SoC reported in car scanner is slightly lower. So the is 100% for my battery. Notice the Battery Energy field at the bottom. 76.65 kwh. Now if I multiply the known usable portion of my battery from the factory (83.7) by my SoH (88.39) I get 74 kWh. I’m wonder if the buffer is in play here? Can anyone give me a. Refresher on how the buffer is allocated or utilized?

Despite Porsche stating a net battery capacity of 83.7 kWh it seems the true usable capacity is 86.7 kWh. At a SoH of 88.39% it works out to exactly the 76.6% battery energy shown on Car Scanner.

 

[Yaibal]

Despite Porsche stating a net battery capacity of 83.7 kWh it seems the true usable capacity is 86.7 kWh. At a SoH of 88.39% it works out to exactly the 76.6% battery energy shown on Car Scanner.

Is this 86.7 number published anywhere? Thanks for the info! I love it when numbers make sense. Makes me even more curious about the buffer though.

 

[gtm]

Is this 86.7 number published anywhere? Thanks for the info! I love it when numbers make sense. Makes me even more curious about the buffer though.

I'm not sure it is actually official/published anywhere but if you go back to the start of this (long) thread you will find multiple references to 86.7 kWh being the real net capacity. As in your case the numbers work if that is the actual net capacity and they don't at 83.7 kWh.

 

[tchavei]

Another update

20283km
SoH 89.41%

Totally random charging pattern. From as low as 3.25kW (work) up to 220kW (two ionity charges).

 

[ciaranob]

Another update

20283km
SoH 89.41%

Totally random charging pattern. From as low as 3.25kW (work) up to 220kW (two ionity charges).

Thx, will update soon - have been traveling/very busyand away for a while hence my sporadic responses

 

[Gino]

Short answer: It turns out the "deep test" is simply attaching the PIWIS to the Taycan and taking measurements periodically from high to low SoC (around 95% to below 10%). Due to the driving time, this worked out about $700 in labor, and the results were within 1% of what I measured with Car Scanner. Long story below.

Chronology

• Oct 27, 2020: Taycan 4S with performance battery plus purchased new. Battery capacity seemed low from the start (max range about 209 miles).
• Jan 3, 2023: First major service ("20K mile service") performed at 33,485 miles. I requested a battery state of health check. Response on invoice: "our tester don't printout have no option".
• Feb 11, 2023: Dealership serviced red "electrical system error" that only occurred with L2 charging at 34,126 miles (as well as heater failure). Dealership replaced 11 kW charger twice since first replacement did not work. (Heater replaced with PAD 963-507 and is still working as of Dec 24, 2023.)
• Aug 19, 2023: After three years of suspicion about the high voltage battery state of health, I finally bought an OBDII reader and used the Car Scanner app to view the cell voltages and pack SoH. Result: 75.57% SoH with two low voltage cells. This could trigger warranty service if confirmed by the dealership, so I booked an appointment for SoH measurement at the earliest available date of Sep 18, 2023.
• Sep 18, 2023: Dealership figured out how to perform SoH measurement, and confirmed 75% as reported by Car Scanner, but my mileage was now 39,526, whereas the HV battery warranty steps down to 70% SoH guaranteed after 37,750 miles. Therefore my HV battery was deemed acceptable and no service was performed, despite the poor battery capacity since new, and the two cells with abnormally low voltages. I paid $700 for this SoH confirmation, almost entirely for labor for the service technician to drive my Taycan with PIWIS attached from high to low SoC.
• Nov 26, 2023: Taycan failed again with red "electrical system error", but this time from entering the vehicle, and not just when attempting to charge. It did not clear overnight, so I had it towed to the dealership for service at 41,101 miles. Porsche replaced the entire HV battery under warranty, and I now have 99.82% SoH, and the latest design (2021+) HV battery.

Other details

• After the HV battery replacement, the dealership service representative told me that the warranty charge (billed to Porsche) was $44,400 + $13,065 core charge for the HV battery, plus about $9,000 for labor. So in the future if the battery is somehow damaged such that it cannot not be factory refurbished, then the retail price will be $44,400 + $13,065 = $57,465, not including labor.
• The dealership service representative told me that they had another Taycan customer with the same failure earlier in 2023, and at that time Porsche directed replacement of the reported bad battery modules only, rather than the entire HV battery pack. The rep told me that a Porsche engineer flew in from Germany to oversee the battery pack rework. They could not get the reworked pack to work properly, so after five months in the shop they bought the Taycan back from the customer. I was fortunate to have my HV battery failure after that because Porsche is now approving HV battery pack replacement based on initial symptoms rather than first attempting cell replacement.
• The dealership replaced four refrigerant pressure sensors at about $135 each plus labor, under warranty, per campaign WMP5, which I was not aware of. Per the invoice, "Removed all necessary components to access refrigerant pressure sensors and found all sensors required replacement." Glad to have that addressed before summer!

This is incredibly good information. Thank you.

 

[Bognar67]

Hi, 22k miles update:
-SOH 92,6% (up by 0,7% since my last report at 19k miles, 5 months ago.)
Charged to 100% and went down to ca 50% at the actual reading.
Degradation numbers are flattening nicely with the collected miles.
No DC charging since the last reading.

 

[freeforall]

Hi, 22k miles update:
-SOH 92,6% (up by 0,7% since my last report at 19k miles, 5 months ago.)
Charged to 100% and went down to ca 50% at the actual reading.
Degradation numbers are flattening nicely with the collected miles.
No DC charging since the last reading.

Does anyone has an idea what Energy turnover number corresponds to?
Seeing 97000 kWh above for 35k km got me wondering. If this is total energy consumed, that seems extremely high (270 kWh per 100km)
My car shows slightly more than 4000 kWh of energy turnover with a total mileage of 15k km. The difference is huge. Thanks

 

[Bognar67]

Does anyone has an idea what Energy turnover number corresponds to?
Seeing 97000 kWh above for 35k km got me wondering. If this is total energy consumed, that seems extremely high (270 kWh per 100km)
My car shows slightly more than 4000 kWh of energy turnover with a total mileage of 15k km. The difference is huge. Thanks

Correct. Effektíve speed limit in HU 147km/h and frequent drives in Germany on the no speed limit autobahn. I use the car as a Porsche.

Anyway it is not 270kWh/100km but 27kWh/100km that average total consumption (incl. pre cool and pre heat I use frequently) is correct in my case.
The 270 is really creasy, so maybe this datapoint is not useful.
Don't you have 40k there out of 4k?

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