⚡️ Home Charging Issues after Software Update? (Tracking Thread)

[toontoon]

I just called Porsche NA again, it appears they do have a fix now. It didn't seem like it was something relayed to the dealerships as they had to contact my service center with the details for the fix. I would try calling soon and setting up that appointment. Fingers crossed

Let us know if you have any updates please.

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[jergans]

Have the same new issue after charging without problem on my 12 year old Tesla 220v charger in my garage over the past 9 months. Did get the update several months ago and this only happened over the past two days (leaving the car off overnight didn’t help). Today I tried to charge using the Porsche charger that came with the car on a 115 volt outlet. Still wouldn’t work and gave the same errors. 350kW Electrify America DC charger works fine.

I literally have the identical experience to you.

 

[daveo4EV]

NOTE: many many SmartMeters will show "voltage" as part of their normal cycle of information displayed on the meter

this piece of data is critical as part of diagnostic information for this issue - based on postings it seems that Porsche has narrowed the parameters for "acceptable" voltage to 250 volts or less in order to initiate an L2 AC charging session…

while this is a good plan in theory grid voltage in North America varies from 200-255 volts as part of "normal" fluctuations and can be different seasonally, daily, hourly, and based on current overall grid loads…

your electrical companies smart meter that is where the power comes into your home will/should show current voltage - and if you can't charge and your meter is showing voltage the time of day, and voltage at the time the charging session failed would be useful diagnostic data…

see picture below for my smartMeter showing 245.5 volts at 13:50 on Feb. 14th…most smart meters in North America will display information - my voltage varies from 223 to 252 volts at various times of the year and through out the day…

here is voltage being fed to my house as logged by my UPS for my internet equipment rack…this is normal and nothing to freak out about…graph below is 24 hours worth of data every 5 minutes or so…range is 124.2 volts to 122.6 volts over the course of 24 hours…summer looks very different.

 

[Bauer83]

No, I get the lvl 1 working first, disconnect and then hook up the lvl 2 on the same port. I don’t quite understand it myself… but it almost seems like the first initialization stays good for a while??

Thanks for this. Needed to use this approach this weekend to get it to charge at home, and worked both times. The his is without any voltage regulator. Both times it did fail first on my level 2 charger, but disconnecting the level 1 and plugging in my L2 immediately after did the trick.

 

[annwills]

NOTE: many many SmartMeters will show "voltage" as part of their normal cycle of information displayed on the meter

this piece of data is critical as part of diagnostic information for this issue - based on postings it seems that Porsche has narrowed the parameters for "acceptable" voltage to 250 volts or less in order to initiate an L2 AC charging session…

while this is a good plan in theory grid voltage in North America varies from 200-255 volts as part of "normal" fluctuations and can be different seasonally, daily, hourly, and based on current overall grid loads…

your electrical companies smart meter that is where the power comes into your home will/should show current voltage - and if you can't charge and your meter is showing voltage the time of day, and voltage at the time the charging session failed would be useful diagnostic data…

see picture below for my smartMeter showing 245.5 volts at 13:50 on Feb. 14th…most smart meters in North America will display information - my voltage varies from 223 to 252 volts at various times of the year and through out the day…

here is voltage being fed to my house as logged by my UPS for my internet equipment rack…this is normal and nothing to freak out about…graph below is 24 hours worth of data every 5 minutes or so…range is 124.2 volts to 122.6 volts over the course of 24 hours…summer looks very different.

Thanks for this. Needed to use this approach this weekend to get it to charge at home, and worked both times. The his is without any voltage regulator. Both times it did fail first on my level 2 charger, but disconnecting the level 1 and plugging in my L2 immediately after did the trick.

It does appear that the problem is due to an overly strict allowable variation in voltage. However, I cannot charge with my voltage consistently in the 243 to 245 range, which coincidentally is at or just outside the European standard limit of 230 volts, -10% + 6%. I don't expect that Porsche applied the European standard to North America, but the numbers are interesting. Looking forward to my visit to the dealer on Thursday.

 

[Dandar245]

Thanks for this. Needed to use this approach this weekend to get it to charge at home, and worked both times. The his is without any voltage regulator. Both times it did fail first on my level 2 charger, but disconnecting the level 1 and plugging in my L2 immediately after did the trick.

Super, glad it worked for you. It’s a bit ridiculous we are reduced to this nonsense, but at least there is a consistent way to charge until the fix

 

[SandyHaus]

Porsche West Denver not returning my calls. Awaiting arrival of voltage regulator since simply using my Porsche 110v adapter without it gave same error.

Sandy

 

[daveo4EV]

NOTE: many many SmartMeters will show "voltage" as part of their normal cycle of information displayed on the meter

this piece of data is critical as part of diagnostic information for this issue - based on postings it seems that Porsche has narrowed the parameters for "acceptable" voltage to 250 volts or less in order to initiate an L2 AC charging session…

while this is a good plan in theory grid voltage in North America varies from 200-255 volts as part of "normal" fluctuations and can be different seasonally, daily, hourly, and based on current overall grid loads…

your electrical companies smart meter that is where the power comes into your home will/should show current voltage - and if you can't charge and your meter is showing voltage the time of day, and voltage at the time the charging session failed would be useful diagnostic data…

see picture below for my smartMeter showing 245.5 volts at 13:50 on Feb. 14th…most smart meters in North America will display information - my voltage varies from 223 to 252 volts at various times of the year and through out the day…

here is voltage being fed to my house as logged by my UPS for my internet equipment rack…this is normal and nothing to freak out about…graph below is 24 hours worth of data every 5 minutes or so…range is 124.2 volts to 122.6 volts over the course of 24 hours…summer looks very different.

NOTE: my 2024 Macan Turbo EV charges just fine at my voltage in my home - I've lived in this home for 10+ years at this point and have owned EV's that entire time - I have NEVER had any trouble with L2/AC charging with any EV (Porsche or otherwise)…

my 2024 Macan Turbo EV has _NOT_ had the new software update installed - so a pre-Update 2024 Macan Turbo EV has no problems charging at 245.5 volts - and my Loaner Macan 4 EV also charged fine when it was hanging out at my home - I don't recall it's software update status…

I'm holding off on updating my 2024 Macan Turbo EV until this particular issue is resolved - I'm in no hurry…

 

[ScottM]

I think I found something interesting regarding this charging issue. I bought a voltage meter and noticed a regular 120 outlet at my home was reading high 126-127. The level 2 charger would be double that. I also bought a surge protector that monitors the voltage from an outlet real time. The reading varies but when I saw it was reading low like 122-123, my level 2 charger finally worked. I’m starting to think the update might have changed something with a voltage check during the handshake. The voltage meters was pretty cheap, would appreciate if any others having this issue could let me know your readings to test this theory

@Dandar245 – Your voltage theory is spot on, and I have the diagnostic data to back it up.

I’m in Chicago and have been dealing with this for 37 days. To isolate the issue, I had a master electrician verify a steady 246v at my home. More importantly, my dealer actually sent a technician to my residence to perform a diagnostic test at the source. Using Porsche’s own equipment, they confirmed the vehicle sees 245v at the inlet and rejects it immediately.

To completely disprove the 'grid' excuse that Porsche NA is using, during that same technician visit, we performed a control test: we plugged a Porsche Cayenne Hybrid into the exact same charger/outlet and it charged perfectly.

This confirms that the late-2025 software update (WSJ0) narrowed the handshake tolerance so much that standard North American residential voltage—which often sits right in that 245V-250V range—is being flagged as an error. The infrastructure is fine; the car’s current software logic is the defect.

 

[ScottM]

• Year and Model: 2025 Macan 4S
• Your Location: Chicago, IL
• Charger at Home: Porsche MobileCharger, Emporia Level 2 Wall Charger. Both worked fine for 10 months until this software update.
• Charging Port: Tried BOTH, Neither work.
• Timeline: after update was done in late Jan, it charged at home one or two times then never again. Same error as everyone else has reported here.
• Troubleshooting Steps Taken: Tried different chargers, locations (even public Level 2 doesn’t work). Only public Level 3 (both EA and Tesla Chargers work). Tried to charge in indoor heated garage at a friends apartment building and it doesn’t work.
• Current Status: Very frustrated that Porsche doesn’t event acknowledge the issue. Dealer Service Advisors answers are infuriating. First he said only Chicago is experiencing the problem. Then I sent him this forum thread then they said oh ! we didn’t know this. Called Porsche NA; clueless and no call back. How can they ignore such a widespread problem.
  
  Does anyone know if this kind of malfunction is covered under the lemon law ? What are an owners legal options.

@knight641 – Fellow Chicago owner here. I’m at 37 days out of service on my 2025 Turbo.

To answer your question: Yes, in Illinois, you are generally in Lemon Law territory once the vehicle is out of service for 30 business days Don’t let the dealer or Porsche NA (PCNA) tell you this is just a 'Chicago grid' issue.

My dealer actually sent a technician out to my house to investigate. Using Porsche’s own diagnostic equipment, they confirmed the car sees 245v at the inlet and rejects it immediately. To prove it was the car and not my home, we performed a control test during that same visit: we plugged a Porsche Cayenne Hybrid into the exact same charger/outlet and it charged perfectly.

This proves the residential infrastructure is compliant and the failure is isolated to the Macan’s current software logic following the recent update. Porsche NA is still claiming 'external influences' to me, but their own technician's on-site verification disproves that. I’ve moved to formal legal notice. Stay firm on your timeline.

 

[ScottM]

You're right, that's how it should work.

At the dealership: It's 100% (not 50%). White line turns green when the connection is set up b/w the charger and the car.

At my home: I think it's yellow but may be the pic doesn't show it. It is essentially to explain that the charger isn't able to make the connection with the car. There is an error code associated with this, which Porsche NA team found useful. When you tap on to 50%, it can change to 100% (there is a sensor on the charger itself). I tried both, nothing worked.

@toontoon – Don’t let the 50%/100% toggle or the light colors distract you. I’ve been through the exact same loop here in Chicago (now 37 days OOS).

My dealer actually sent a technician to my house with Porsche diagnostic gear to settle this. We confirmed the car sees a compliant 245v at the inlet but the software rejects the handshake immediately. During that same visit, we plugged a Cayenne Hybrid into the exact same charger and outlet—it charged perfectly at 100%.

This proves it’s not your charger or your home’s 'useful' error codes; it’s the 28.13 software logic failing to accept North American residential voltage. Porsche NA is using these technical 'investigations' to stall. I’ve already received their 'final position' denial and have moved to formal legal notice. If you've hit 30 business days OOS, you should consider the same.

 

[daveo4EV]

@knight641 – Fellow Chicago owner here. I’m at 37 days out of service on my 2025 Turbo.

To answer your question: Yes, in Illinois, you are generally in Lemon Law territory once the vehicle is out of service for 30 business days Don’t let the dealer or Porsche NA (PCNA) tell you this is just a 'Chicago grid' issue.

My dealer actually sent a technician out to my house to investigate. Using Porsche’s own diagnostic equipment, they confirmed the car sees 245v at the inlet and rejects it immediately. To prove it was the car and not my home, we performed a control test during that same visit: we plugged a Porsche Cayenne Hybrid into the exact same charger/outlet and it charged perfectly.

This proves the residential infrastructure is compliant and the failure is isolated to the Macan’s current software logic following the recent update. Porsche NA is still claiming 'external influences' to me, but their own technician's on-site verification disproves that. I’ve moved to formal legal notice. Stay firm on your timeline.

grid issues!!! OMG they are grasping at straws - other EV's and Porsche's _OWN_ EV's continue to charge at your grid-power-supply…they really really are just so clueless…

good luck!! I hope they resolve this it's not a grid issue!

PTSD: reminds me of the Porsche EVSE power supply cable overheating issue - where Porsche issues a technical bulletin that blamed "low quality NEMA sockets are overheating" - because ya'know the NEMA socket generates it's own heat - OMG!!

your information and engineering based approach has been soooo useful - keep up the good work!

 

[toontoon]

@toontoon – I’ve already received their 'final position' denial and have moved to formal legal notice.

When did this happen? When I visited the dealership last, they said that Porsche has accepted the issue and are working on this as a high priority.

FYI, thinking through the legal approach too.

 

[daveo4EV]

at a minimum Porsche has handed you a get out of jail free card for lemon law - you can always take it and swap to a later Macan EV or different Porsche

the buyback pricing Porsche is forced to accept will never be better for selling your current vehicle…

I'm not saying you should do this, but I have no problem taking Porsche's money and using them like an ATM machine when they screw up - and they are screwing up right now…

they are stubborn/proud german company and they need to be forced to acknowledge errors that are long since obvious…

this is fascinating to watch play out and I'm holding off on updating my Macan EV until we have confirmed and released software that resolves this issue.

 

[ColdCase]

Is Porsche legally required to operate on out of spec grids? If not, then what is the basis for any legal or lemon law action (the car is not broken)? Asking for a more disciplined/precise German friend ...

One may have to direct legal action at the service provider, I wouldn't expect any 240 V device to work well for long when fed with like 300 V. I've observed plenty of smoking power supplies over the years, and a few litigations. Sometimes it is a good idea to build in over voltage protection.

Good engineering practice or customer service is another issue.

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