charging issues with the Porsche charger

[Eric]

As mentioned in many posts the Porsche charger is not very good.In my case after the latest update and even before the latest update i had to downtune the Amperage from 40 Amps to 30 Amps in order to prevent a shutdown when charging.At this setting I was charging at 30 Amps and 5.9 Kwatts using the standard 14-50 plug at roughly 220 volts.I decided to measure the temperature of the charging system and came up with some surprising facts at least to me no 1)the 14-50 plug and the small connecting cable to the charger never got beyond 90 degrees F. 2) the 26 foot standard Porsche cable never got very hot except just before the cable entered the J-1772 plug and the following data describes the temp progression during the charging process after 2hours T 95 F 4h T 110 F 5.5h T 120 F (30 Amps at 5.9 Kwatts) 3)the J-1772 plug at the end was 100 F ( SOC 90 %)and the rest of the system was still lukewarm.What is surprising to me is that only a small part of the cable( 2 inches)just before the attachment to the J plug got very hot.I do not know at what point the system shuts itself down but it cannot be very far away from the 120 degree F mark and also I do not understand why only a small part of the cable shows excessive heating.Does anybody have an understanding of the data i just presented?

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[Archimedes]

Aren’t there already three or four existing threads on this topic?

 

[daveo4EV]

this issue is well covered in existing threads…the PMC+/PMCC run hot vs. competitive alternatives - most people either live with it or get an alternative EVSE - at this time that's the only solution.

• https://www.taycanforum.com/forum/t...pmcc-via-ota-update.12791/page-28#post-195191
• https://www.taycanforum.com/forum/threads/nema-14-50-supply-cable-heat-data.1940/
• https://www.taycanforum.com/forum/threads/need-a-class-action-lawsuit-porsche-mobile-charger.12860/
• https://www.taycanforum.com/forum/t...-amperage-for-normal-usage-of-the-pmcc.12384/

and many many others…

this is a known issue - no fix - PMC+/PMCC suck in North America - get another 40 amp EV charger for $200-$1200 and move on…there are plenty of fully functional non-overheating alternatives…

bringing this to Porsche's attention will simply result in them referencing their existing recommendation/tech bulletin that you should run the unit at 20 amps (50%) to avoid any excess thermal issues.

 

[Eric]

this issue is well covered in existing threads…the PMC+/PMCC run hot vs. competitive alternatives - most people either live with it or get an alternative EVSE - at this time that's the only solution.

• https://www.taycanforum.com/forum/t...pmcc-via-ota-update.12791/page-28#post-195191
• https://www.taycanforum.com/forum/threads/nema-14-50-supply-cable-heat-data.1940/
• https://www.taycanforum.com/forum/threads/need-a-class-action-lawsuit-porsche-mobile-charger.12860/
• https://www.taycanforum.com/forum/t...-amperage-for-normal-usage-of-the-pmcc.12384/

and many many others…

this is a known issue - no fix - PMC+/PMCC suck in North America - get another 40 amp EV charger for $200-$1200 and move on…there are plenty of fully functional non-overheating alternatives…

bringing this to Porsche's attention will simply result in them referencing their existing recommendation/tech bulletin that you should run the unit at 20 amps (50%) to avoid any excess thermal issues.

My point was that in contrast what is previously reported the small cord connecting to the 14-50 nema plug does not get hot at all instead it is getting very hot just below the J plug ie over 120 F.All in all this system PMCC as reported does not function at 40 Amps but for safety reason need to be downtuned to twenty Amps

 

[Eric]

Aren’t there already three or four existing threads on this topic?

Yes there are but it cannot hurt to remind folks that this charger should not be used at 40 Amps but significantly lower ie 20 Amps

 

[daveo4EV]

https://www.taycanforum.com/forum/t...ky-for-the-pmc-pmcc-overheating-issues.13073/

 

[daveo4EV]

My point was that in contrast what is previously reported the small cord connecting to the 14-50 nema plug does not get hot at all instead it is getting very hot just below the J plug ie over 120 F.All in all this system PMCC as reported does not function at 40 Amps but for safety reason need to be downtuned to twenty Amps

120F at the J-1772 is not ideal but it's also not horrible - also this data with out disclosing ambient temp is also less useful - if ambient is 40F then this _IS_ horrible - if ambient is 92F then actually 120F is actually excellent

the bigger issue is the power supply cable which as been shown to melt. and reach temperatures in excess of +100F delta over ambient air temperatures…and internally with thermal imaging in excess of 200F…

the PMC+/pMCC aren't that great in the North American market.

 

[Archimedes]

Yes there are but it cannot hurt to remind folks that this charger should not be used at 40 Amps but significantly lower ie 20 Amps

Good forum etiquette is to post in an existing thread, rather than create duplicate threads on the same topic. Always good to do a search before starting a new thread.

 

[Eric]

120F at the J-1772 is not ideal but it's also not horrible - also this data with out disclosing ambient temp is also less useful - if ambient is 40F then this _IS_ horrible - if ambient is 92F then actually 120F is actually excellent

the bigger issue is the power supply cable which as been shown to melt. and reach temperatures in excess of +100F delta over ambient air temperatures…and internally with thermal imaging in excess of 200F…

the PMC+/pMCC aren't that great in the North American market.

The point really is not what the ambient temperature is at the start but what the maximum temperature is the charging cords can handle before a dangerous short occurs.I cannot find data for what temperatures these cords are rated .I note that the Porsche charger is not UL rated and therefore suspect.The Tesla charger is UL rated

 

[Eric]

Good forum etiquette is to post in an existing thread, rather than create duplicate threads on the same topic. Always good to do a search before starting a new thread.

This not a duplicative thread.This is more date on a serious safety issue so please stop criticizing on about more post on this issue

 

[Eric]

This not a duplicative thread.This is more date on a serious safety issue so please stop criticizing on about more post on this issue

pst should be data sorry

 

[daveo4EV]

The point really is not what the ambient temperature is at the start but what the maximum temperature is the charging cords can handle before a dangerous short occurs.I cannot find data for what temperatures these cords are rated .I note that the Porsche charger is not UL rated and therefore suspect.The Tesla charger is UL rated

honestly you are wrong - delta temp rise _IS_ the core issue - the cords are rated at 105C (it's embossed on the cord) - so 120F is no were "near" a short - thermal limits are all designed in terms of "expected" temperature rise above ambient since you can't not expect something to get "cooler" during use - so a 30F expected rise in temp above ambient would be considered reasonable and safe.

the Porsche EVSE is well certfied and rated - UL is not the only standards organization on the planet.

but in this case the Porsche product is "safe" but it's expected temperature rise for the power supply cable is 90F for 10 AWG wire.

 

[daveo4EV]

and if you would participate/read in the other threads - you can see teh Porsche Charger is also UL rated in North America

https://www.taycanforum.com/forum/t...rsche-mobile-charger.12860/page-9#post-194239

note the UL standard's rating in the upper right of the lable on the back of the unit in the photo or the back of your unit.

so far nothing you've brought up is unique/new verses other existing threads.

 

[Eric]

honestly you are wrong - delta temp rise _IS_ the core issue - the cords are rated at 105C (it's embossed on the cord) - so 120F is no were "near" a short - thermal limits are all designed in terms of "expected" temperature rise above ambient since you can't not expect something to get "cooler" during use - so a 30F expected rise in temp above ambient would be considered reasonable and safe.

the Porsche EVSE is well certfied and rated - UL is not the only standards organization on the planet.

but in this case the Porsche product is "safe" but it's expected temperature rise for the power supply cable is 90F for 10 AWG wire.

Thanks about the max temperature for the charging cord.My info now says operating temperatures from -50 to+ 70 degrees Celcius.

 

[Eric]

and if you would participate/read in the other threads - you can see teh Porsche Charger is also UL rated in North America

https://www.taycanforum.com/forum/t...rsche-mobile-charger.12860/page-9#post-194239

note the UL standard's rating in the upper right of the lable on the back of the unit in the photo or the back of your unit.

so far nothing you've brought up is unique/new verses other existing threads.

I looked at the back of the unit and nowhere can I find the UL symbol usually it is a circle with within the UL letters

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