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

[ColdCase]

Also, is there any charger where one can lower the voltage output ?

If your service provider won't address this, I would look at so called power line regulators or conditioners and feed your EVSE with its output. I think 45 amp rated ones are available for about $500 US but require professional installation.

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[joeev]

I don't have issues with home charging and I just checked voltages from my last charging session and it was between 238.8v to 241.4v the whole time

 

[daveo4EV]

my smart meter (the billing meter for my home) show voltage as part of its information display rotation

if Macan charging does not work above 250 volts this could be the sort of software driven charge causing the issue

voltage is also highly location and time of day dependent

interested….

 

[Dandar245]

I don't have issues with home charging and I just checked voltages from my last charging session and it was between 238.8v to 241.4v the whole time

Thank you for sharing

 

[SeaMonkey80]

My car charges at the dealership, my charger works at the dealership too but when I connect the charger at home, the charger lights 50% instead of 100% (picture attached). The dashboard says that it's not able to charge my car.

If you push and hold the button for 2 seconds, it will switch from 50% to 100%. It comes set at the factory at 50% for whatever reason. Took me several hours of scratching my head and searching in the manual until I finally found it.

 

[ColdCase]

Just a reminder this this 50%/100% setting just sets the EVSE current available parameter that is sent to the car It is up to the car to pull current up to that limit. When a car busts that limit, the EVSE should shut off the charging power (open the power relay contacts).

 

[daveo4EV]

Just a reminder this this 50%/100% setting just sets the EVSE current available parameter that is sent to the car It is up to the car to pull current up to that limit. When a car busts that limit, the EVSE should shut off the charging power (open the power relay contacts).

max power from the mobile Porsche EVSE is 40 amp draw - at what ever voltage being provided by the socket it's plugged into (220/240 volts is nominal) - 40 amps is also the max draw of the North American Macan

normally this all works out to 9.6 kW or 9,600 watts

while technically an EVSE should shutdown when the car requests "more" AMPS that is advertised by the EVSE - in practice this is not the case

EVSE's are not that complicated or very smart - largely they are just 'on/off' swtiches with some GFI style safety checks if voltage gets out of whack…

my son's Tesla MOdel Y draws 42 amps from my Porsche Mobile charger Connect - and it all works fine until it doesnt'…

also a vehicle drawing more than advertised by the EVSE would be a bug in the vehicle's on board charging software - and while that's technically possible it's a pretty egregious voliation of the J-17721/ISO charging protocols so I'm not sure how that bug would make it into the field - but anything is possible…

https://www.macanevowners.com/forum...-common-misconceptions-what-is-an-evse.22275/

Porsche blaming the EVSE for any of these charging problems would be like Dyson blaming the power socket for why their hair dryer doesn't work…

 

[SeaMonkey80]

Just a reminder this this 50%/100% setting just sets the EVSE current available parameter that is sent to the car It is up to the car to pull current up to that limit. When a car busts that limit, the EVSE should shut off the charging power (open the power relay contacts).

All I can tell you with my Macan 4S is that at the 50% setting it was charging at 5.3 kW, and at the 100% setting it was charging at 9.6 kW. I was kind of bummed that it can't charge at 11 kW like my Rivian using my Rivian wall charger (even though the manual says that it can charge at that rate), but I'm guessing it is a North America thing.

 

[toontoon]

My Porsche dealer said that Porsche NA has confirmed the issue, they're collecting serial number of the home charger and the VIN from impacted customers. They're also working on it to fix the issue asap. The same issue is not letting cars charge at an expected rate at the DC charging stations.

 

[Bauer83]

My Porsche dealer said that Porsche NA has confirmed the issue, they're collecting serial number of the home charger and the VIN from impacted customers. They're also working on it to fix the issue asap. The same issue is not letting cars charge at an expected rate at the DC charging stations.

I wish I could get a response from Porsche NA, as some of what we have been testing here could be helpful.

Today after a long road trip w/ 2 fast charging (which is so nice to see 275+ KW by the way):
- @248-249Volts - failed to charge
- @244 Volts - charged at home

I am going to try and make sure I keep records of this as I move forward, but for anyone that has the ability to see how their voltage at their house changes over the day I would recommend trying to see if you have any luck closer to 240V.

 

[ColdCase]

https://www.macanevowners.com/forum...nt-update-partial-solution.24319/#post-372167

 

[nick729]

Not sure voltage is the issue. My other home has voltage drops/surges far beyond what is acceptable. If the voltage drops/surges it just stops charging until the voltage goes back to normal and it starts charging again. But there are no issues getting the car to charge there. Also, it is the charger and not the car that stops the charging, car does not care.

My charger stops charging the car if the voltage drops below 207v or surges past 255v in any of the 3 phases. Acceptable voltage is 230 +-10% from the electricity supplier at least over here. i can even increase the voltage drop/surge tolerance on the charger and it will and does charge the car with even lower/higher voltage.

Same exact charger in my main home where i cannot get the damn car to charge, but i do not have voltage drops/surges here. Also, at home voltage is very stable 230 +-3% max as far as i have seen and the charger itself did not throw an error due to voltage surge/drop ever. The same charger in my other home throws errors every single time the voltage drops/surges.

So i doubt that this is the issue.

Apparently, German Porsche engineers are planning to fly over to my house to investigate the issue in a few weeks time. They are trying to arrange the date.

 

[ColdCase]

while technically an EVSE should shutdown when the car requests "more" AMPS that is advertised by the EVSE - in practice this is not the case

EVSE's are not that complicated or very smart - largely they are just 'on/off' swtiches with some GFI style safety checks if voltage gets out of whack…

According to Grizzl-E classic documentation, the basic dumb EVSE has an overcurrent monitor and throws a fault when current draw is more than set by the DIP switches. I think the feature is required to get certified and EVSEs that have that sticker would have something similar. When it throws a fault it breaks the AC circuit which stops charging.

Dunno, haven't had an opportunity to test it.

"Safety Features: Over Current, Over Voltage, Under Voltage, Missing Diode, Ground Fault, and Over Temperature Protections. Self-Monitoring and Recovery, Power Outage Recovery."

 

[Bauer83]

Morning results:
- 250.5V -> failed to charge
- 244.7V - > charged successfully

I am going to go and pull all the data from the charger, and see if I am able to sort through when charging starts if there is a trend over the past 60 days for voltage at that moment.

For clarity - nothing else changed between these two times. I am not unplugging the vehicle and replugging it in. I am using the app to attempt to start charging with a departure in the future so that it remains in a paused charging state until I see the voltages that I am testing.

 

[Bauer83]

Morning results:
- 250.5V -> failed to charge
- 244.7V - > charged successfully

I am going to go and pull all the data from the charger, and see if I am able to sort through when charging starts if there is a trend over the past 60 days for voltage at that moment.

For clarity - nothing else changed between these two times. I am not unplugging the vehicle and replugging it in. I am using the app to attempt to start charging with a departure in the future so that it remains in a paused charging state until I see the voltages that I am testing.

Reviewing the data was extremely helpful for myself and my situation. Understand it may not be everyone's, but my home issues charging are clearly tied to voltage. What's interesting is I am able to watch where its trying to connect and getting the charging stopped issue, I can see what the exact voltage is the seconds before it occurs.

Then I was able to go back and see where successful and I am drawing full power on the charger, what was the voltage prior to initiating a successful charge.

I wish I was able to pull the voltage information through CSV instead of just the draws, but I sampled around 15 successful and unsuccessful charges and that's what the information shows as I can determine voltages via the app. It's cumbersome so I am going to reach out to Emporia to grab this information and hopefully at some point someone from Porsche will contact myself and I will share the information.

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