[North American] - Home / Residential charging update (using Tesla Universal Wall Charger)

[dgkhn]

other's chiming in on this "descrepancy" will help get Porsche's attention - like any major corporation the more feedback the better - and we need volume to get this any attention - if you agree this is a problem - you're welcome to use my letter as a template to forward to your local dealer/service-manager - if you do not agree this is an issue, you don't need to send the letter

Good suggestion, which I took. I just sent the below to Porsche Customer Service (I also included my vin in the email sent).

Both the Porsche news website, and the Macan EV configurator indicate that Macans have 11 kW onboard chargers (the configurator stated that my car has an 11 kW charger). The charging behavior of my Macan 4 implies otherwise (the car never indicates greater than 9.3 kW when connected to my ChargePoint chargers at different sites, which are both configured to provide 10.5 kW (240v x 44 amps). The EVSE’s themselves also indicate a max of about 9.5 kW during charging sessions). Several forum reports I’ve seen agree with this observation (i.e. imply that the onboard charger is 9.6 kW +/-).
Could you please review and confirm the actual onboard charger capacity, and provide an explanation of why the capacity is different from promised if that is the case? In my situation, I specifically set up hardwired EVSE’s in anticipation of being able to charge my Macan at over 40 amps, and would not have done so if I had known that my Macan would not exceed 40 amps.
If the onboard charger is in fact 11 kW, how do we take advantage of that capacity?

 

[daveo4EV]

this is a bit funny - but it's not…

literally for years the Taycan site in North American listed Taycan as a 9.6 kW onboard charger - but it actually shipped with an 11 kW charger - and Porsche never updated the website…

so now in 2024 the Macan lists the onboard charger as 11 kW, but actually can only charge at 9.6 kW…

Porsche's EV charging game is weak and they are just confused - I'll be interested to hear anything if they choose to address this issue…

the thread I started with Taycan in July of 2020…over 4 years ago - Porsche was confused by what they were actually shipping…

https://www.taycanforum.com/forum/t...-charger-48-amps-not-max-9-6-kw-40-amps.1793/

 

[dgkhn]

this is a bit funny - but it's not…

literally for years the Taycan site in North American listed Taycan as a 9.6 kW onboard charger - but it actually shipped with an 11 kW charger - and Porsche never updated the website…

so now in 2024 the Macan lists the onboard charger as 11 kW, but actually can only charge at 9.6 kW…

Porsche's EV charging game is weak and they are just confused - I'll be interested to hear anything if they choose to address this issue…

the thread I started with Taycan in July of 2020…over 4 years ago - Porsche was confused by what they were actually shipping…

https://www.taycanforum.com/forum/t...-charger-48-amps-not-max-9-6-kw-40-amps.1793/

Wow. Very interesting thread, even though 4 years have passed (and I have never owned a Taycan or anything made by Tesla). I see there are other related threads on the Taycan forum also.

It appears Porsche is still confused! That's really not so funny, is it.

 

[DuckMan]

9.3 kW here on a 48 amp setting Charge Point. Does all the scheduling correctly, but would like to see the car charge at the rate advertised.

 

[whitex]

pic below is my Macan charging from my PMCC unit provided w/2021 Cayenne TurboS eHybrid - note the amps is more than capacity - hmmmm…

PMCC is showing advertised capacity, it looks like the car is simply not respecting it, or the PMCC measurement has issues. Did the Macan show 40.7A as well? Did you try it with Tesla wall connector (see what Amps reported by the UI)? Maybe they forgot to account for the overhead used by the car and charger, and only throttle based on the output to the battery? Possibly that is why they lowered the 11KW to 9.6KW (next step down in firmware probably), because the car was overshooting too much?

Perhaps Porsche put the engineers who designed their EVSEs to now design the onboard EV chargers?

 

[daveo4EV]

PMCC is showing advertised capacity, it looks like the car is simply not respecting it, or the PMCC measurement has issues. Did the Macan show 40.7A as well? Did you try it with Tesla wall connector (see what Amps reported by the UI)? Maybe they forgot to account for the overhead used by the car and charger, and only throttle based on the output to the battery? Possibly that is why they lowered the 11KW to 9.6KW (next step down in firmware probably), because the car was overshooting too much?

Perhaps Porsche put the engineers who designed their EVSEs to now design the onboard EV chargers?

that was the Macan charging from the Cayenne's PMCC…I broke it out for testing to "see" what was going on.

 

[whitex]

that was the Macan charging from the Cayenne's PMCC…I broke it out for testing to "see" what was going on.

Yea, but was the Macan in fact drawing 40.7A when only 40A was advertised? PMCC can talk to the car via PLC/ISO 15118 (not sure if Macan can do with with PMCC), so different protocol than SAE J1772, maybe they forgot to test it? Drawing 40.7A sustained on a 50A circuit would probably be an electrical code violation.

 

[daveo4EV]

Yea, but was the Macan in fact drawing 40.7A when only 40A was advertised? PMCC can talk to the car via PLC/ISO 15118 (not sure if Macan can do with with PMCC), so different protocol than SAE J1772, maybe they forgot to test it? Drawing 40.7A sustained on a 50A circuit would probably be an electrical code violation.

can not tell because voltage is not reported - PMCC showed 40.7 amps - no voltage information - and the Macan shows 9.3/9.4/9.5 fluctuating - with out the actual voltage at the moment we can't tell if the Macan is pulling 40.7

I just know my Taycan never pulled more than 39.7/39.8

 

[whitex]

can not tell because voltage is not reported - PMCC showed 40.7 amps - no voltage information - and the Macan shows 9.3/9.4/9.5 fluctuating - with out the actual voltage at the moment we can't tell if the Macan is pulling 40.7

I just know my Taycan never pulled more than 39.7/39.8

Does the Tesla HPWC show you the current used? IIRC you can set it to 40A via the app. (my HPWC's are Gen2, so no app, but 80A).

Alternatively, do you have an EE friends with a meter who know how to measure current?

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