[March 2026 Update] - Porsche's ONLY OTA update hobbles North American Taycans to max 9.6 kW charge rate…

[daveo4EV]

i have just discovered that there's no way you can adjust the amperage of charge at public AC charger (I don't understand why), as I have a 22kw charger and living in fear of the OBC die on the road I will be happy to have this "update"

the update onlyu applies to North America…

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[daveo4EV]

Why not just use public DC charging and avoid public AC? Besides, my guess is that public AC isn’t that likely to be running a 100A circuit if it’s in a small office building, etc. but I’d love to hear from people who use them. I tried for the first time last week at a buildings ChargePoint parking spot (didn’t need the charge as badly as I wanted the rock star parking spot) and it told me I had the wrong type of membership

22 kW is a thing in Europe and more likely than North America…

 

[FrancescoT22]

Why not just use public DC charging and avoid public AC? Besides, my guess is that public AC isn’t that likely to be running a 100A circuit if it’s in a small office building, etc. but I’d love to hear from people who use them. I tried for the first time last week at a buildings ChargePoint parking spot (didn’t need the charge as badly as I wanted the rock star parking spot) and it told me I had the wrong type of membership

I usually charge at home at around 3.7kw, while I'm traveling for work DC fast charging, but for example I will be at an hotel in the alps this weekend.
I will probably arrive with 20% battery and they have a charging spot at the hotel parking lot, so it will be usefull to charge overnight, but I'm a little nervous with the taycan.

 

[daveo4EV]

I usually charge at home at around 3.7kw, while I'm traveling for work DC fast charging, but for example I will be at an hotel in the alps this weekend.
I will probably arrive with 20% battery and they have a charging spot at the hotel parking lot, so it will be usefull to charge overnight, but I'm a little nervous with the taycan.

NOTE: it's reasonable speculation to postulate that reducing power flow levels may increase OBC reliability but there is zero evidence backing up this well founded speculation. Also Euro vs. North America are different beasts given 3 phase AC power vs. Split-Phase AC power for the two regions…

only Porsche knows what is cause the component failures and what changes might lead to increased reliability - and so far they are not sharing their analysis.

My personal opinion is that their OBC is simply poorly engineers and trying to solve the problem by changing my behavior or working around what charge rate I get is like pushing a rope uphill…kinda pointless.

Use the car, enjoy the car, and make Porsche fix it when it breaks - working around their short comings only hides the problems from them meaning they will never learn that weaknesses their Product has and never be forced to face their short comings…

my $0.02 YMMV

 

[FrancescoT22]

NOTE: it's reasonable speculation to postulate that reducing power flow levels may increase OBC reliability but there is zero evidence backing up this well founded speculation. Also Euro vs. North America are different beasts given 3 phase AC power vs. Split-Phase AC power for the two regions…

only Porsche knows what is cause the component failures and what changes might lead to increased reliability - and so far they are not sharing their analysis.

My personal opinion is that their OBC is simply poorly engineers and trying to solve the problem by changing my behavior or working around what charge rate I get is like pushing a rope uphill…kinda pointless.

Use the car, enjoy the car, and make Porsche fix it when it breaks - working around their short comings only hides the problems from them meaning they will never learn that weaknesses their Product has and never be forced to face their short comings…

my $0.02 YMMV

you are right but I will like to come back home on Monday...

 

[Sace]

Have you checked what the charger actually delivers? There is always a difference between the actual charge amount the charger delivers and what the car shows. On my charger I can see the precise charge rate (10,7kWh typically) when the car will show 9,8 or something like that. In theory the software update could just have altered the estimated charge rate the car shows. Unless of cause you also see a drop from the charger side.

 

[daveo4EV]

Have you checked what the charger actually delivers? There is always a difference between the actual charge amount the charger delivers and what the car shows. On my charger I can see the precise charge rate (10,7kWh typically) when the car will show 9,8 or something like that. In theory the software update could just have altered the estimated charge rate the car shows. Unless of cause you also see a drop from the charger side.

if you read through the entire thread it _IS_ a drop in what the charger is delivering - the OBC now only draws 40 amps vs. the 48 amps it used to draw…

this is not just change in display data - it _IS_ a reduction in electrical current draw/load.

 

[Sace]

if you read through the entire thread it _IS_ a drop in what the charger is delivering - the OBC now only draws 40 amps vs. the 48 amps it used to draw…

this is not just change in display data - it _IS_ a reduction in electrical current draw/load.

I guess I was not thorough enough reading it

Having observed my car charging today I and mine did eventually end up showing matching values between car and charger later during the charge.

Well, Porsche continues to impress - and not in a positive way.

 

[RED!]

I guess I was not thorough enough reading it

Having observed my car charging today I and mine did eventually end up showing matching values between car and charger later during the charge.

Well, Porsche continues to impress - and not in a positive way.

The kind of impression an bat makes in your skull... unwanted and unhelpful

 

[SergeyIndy]

Is this the 11kW OBC neuter update under the cover of "battery diagnostics" to nip it to 9.6kW.

 

[RED!]

Is this the 11kW OBC neuter update under the cover of "battery diagnostics" to nip it to 9.6kW.

Yeah, i thought i was getting an upgrade and instead my car’s voice went up two octaves.

 

[SergeyIndy]

Yeah, i thought i was getting an upgrade and instead my car’s voice went up two octaves.

But you got better battery diagnostics, how are you enjoying that

 

[Jasper4S]

'Funny' to see that an OTA BMS update in EU/UK broke navigation and later another update in the US broke charging speed. Not sure Porsche is aware, but these are essential things in an EV that broke down. I turned off OTA. Too much risks

 

[chun]

As these cars / batteries are ageing more and more, people should expect more and more "nerfs" - as porsche wants to keep the number of cars in which the manufacturing defects show up, before warranty is out, to a minimum.

On the german forum people are reporting "nerfed"/reduced high speed charging curves post updates / module replacements. Haven't notice it myself, but i haven't been paing attention, and i can't remember last time i saw a peak of 270kw...

 

[whitex]

Is this the 11kW OBC neuter update under the cover of "battery diagnostics" to nip it to 9.6kW.

If you post the picture with the campaign ID, it is easier to identify.

Then again, if after installing a diagnostic software the OBC slows down charging, that sounds like valid basis to request a new OBC, since the diagnostic software identified the one currently in the car as dangerous and capped its capabilities. If the replacement triggers the same limit, then obviously the replacement is faulty too, so new OBC should be installed until Porsche finally finds you an unbroken one, or they finally come clean about the hidden neuter.

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