New house and new taycan - slow charging

[ripcordaff]

I just picked up a taycan GTS that came with the standard Porsche mobile charger plus. It charged great on the trip from the dealership back to home (7 hours), but when I got home I am getting only 4.3 kWh on a dedicated 60 amp circuit w NEMA 14-50. Before I call an electrician out - any ideas as to why?

My car has the 19.2 kWh option, but I know I can’t take advantage of that without a 100 amp circuit. I would, expect, though, around 11 kWh on a 60 amp circuit.

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[daveo4EV]

your Porsche EV charger (called an EVSE) it set to 20 amp rather than 40 amps

the Porsche provided EVSE (EV charger) included with the vehicle has a long and storied substandard history in North America - it's not a quality product - many on this forum have choosen to purchase a high quality alternative from any number of EV charging vendors - read the thread below and associated links - it is highly unlikely there are any possible questions you have that are not already covered in gory detail in the threads lists in the ultimate guide....

read this to come up to speed…

https://www.taycanforum.com/forum/t...uide-to-the-porsche-evse-pmc-pmcc-pwcc.13886/

this link is also useful…

https://www.taycanforum.com/forum/t...-related-porsche-ntsb-article-analysis.13902/

good luck and welcome to the forums.

 

[Marmolata]

it is running at 50%, press the top icon (looks like plug) down and hold for few seconds until icon below it turns yellow, then press again until your charger switches to 100%. this will get you 8.6 kwh which is max with this charger.

 

[whitex]

a dedicated 60 amp circuit w NEMA 14-50.

This should have failed electrical inspection. NEMA 14-50 should be connected to 50A circuit or lower. You can have 60A rated wires no problem, but the breaker should be 50A, not 60A (since NEMA 14-50 socket is rated at 50A max current).

Also, since you are using a NEMA 14-50 connected EVSE, it will charge at 40A maximum (80% of NEMA14-50's max current), which is 9.6KW, which after loses will show as 8.6 KW in the car. What you see right now is half of that, because Porsche ships their chargers neutered to default to 20A, because their NEMA 14-50 plugs get hot and can melt some non-industrial sockets. As others have mentioned, you can temporarily override it back to 40A, but watch the plug temperatures and watch out for any signs of melting (visual or smells). Follow the links in @daveo4EV 's post above for a lot more information. TLDR, get a different EVSE - if your circuit is in fact 60A, get an EVSE hardwired which is 48A capable (11.5KW).

 

[daveo4EV]

I would, expect, though, around 11 kWh on a 60 amp circuit.

NEMA 14-50/6-50 plugs are 50 amp plugs - not 60 amps - therefore _ANY_ NEMA 14-50/6-50 based EVSE (PMC+/PMCC, Tesla, ChargePoint, etc) will only do a maximum of 40 amps (80% of 50) as per electrical specification and building codes.

NEMA 14-50/6-50 based North American EV chargers (EVSE's) are all 9.6 kW maximum charge rate (40 amps which is 80% of the 50 amp breaker).

There is _NO_ communcation between the vehicle, the plug, and the breaker - the maximum AMPs allowed is IMPLIED/ASSUMED by the plug specification in this case "NEMA 14-50" - NEMA 14-50/6-50 - the "50" in that notation _IS_ the REQUIRED associated breaker size - the plug does not "know" it has a 60 amp breaker upstream, and the breaker does not "know" there is a 50 amp plug down stream - you're not supposed to mix/match like that - it's not how it works - it's against building code because it's not safe. These systems are not "smart"...and never have been. it's why there are licensed and bonded electricians and permits and building permits - this stuff is not fool proof and supposed to be done by people that understand the "rules" - NEMA 14-50/6-50 plugs have 50 amp breakers, not 60 amp breakers - that's the rule - and it's enforced by trained people doing the work - it's also why when people that don't follow the rules (or know the rules) do this sort of thing it's not safe - the system is flawed but it required trained people otherwise it goes haywire...

_ALL_ NEMA 14-50/6-50 based EVSE max out at 40 amps or 9.6 kW (cause them's the rules) - the ONLY legal/building code approved way to get a 60 amp charge rate (48 amps once you account for the 80% rule) is to hardwire the EVSE - there is no NEMA plug for 60 amps - there is no plug based EVSE that is 60 amps in north america.

NEMA 14-50/6-50 = 9.6 kW maximum charge rate - period full stop.
if you want more than 9.6 kW you MUST install a hardwired EVSE with appropriate wire gauge and associated breaker.

 

[whitex]

there is no NEMA plug for 60 amps - there is no plug based EVSE that is 60 amps in north america.

Actually there is a NEMA 14-60. It is not common, especially in residential installations, but it does exist and could be installed. Of course I've never seen an EVSE with NEMA 14-60, but you could take a 48A capable EVSE like the Tesla Wall Connector Gen 3 and equip it with a NEMA 14-60 plug. You can even get one from Hubbell.

 

[daveo4EV]

Actually there is a NEMA 14-60. It is not common, especially in residential installations, but it does exist and could be installed. Of course I've never seen an EVSE with NEMA 14-60, but you could take a 48A capable EVSE like the Tesla Wall Connector Gen 3 and equip it with a NEMA 14-60 plug. You can even get one from Hubbell.

I saw this a couple of years ago - but the electrical sites I found it on listed it for 3-phase usage - now I know I can run residential 240V across this and probably find a power supply cable with a plug and bare leads that I could wire to a hardwired 60/48 amp EVSE - but that's a bit too much DIY for my taste.

 

[JAGMAN]

Ensure the charger is set to 100% as mentioned above. Do this first, mine has been working fine at 100% for a year.

 

[ripcordaff]

Thanks all. I set the charger to 100% and am now seeing 8.7 kWh. I also ordered the Tesla J1772 for future use.

 

[Chas1]

it is running at 50%, press the top icon (looks like plug) down and hold for few seconds until icon below it turns yellow, then press again until your charger switches to 100%. this will get you 8.6 kwh which is max with this charger.

And for home charging, for me at least, that is more than enough.

 

[Leawood CT]

I just picked up a taycan GTS that came with the standard Porsche mobile charger plus. It charged great on the trip from the dealership back to home (7 hours), but when I got home I am getting only 4.3 kWh on a dedicated 60 amp circuit w NEMA 14-50. Before I call an electrician out - any ideas as to why?

My car has the 19.2 kWh option, but I know I can’t take advantage of that without a 100 amp circuit. I would, expect, though, around 11 kWh on a 60 amp circuit.

Like the guys said, change charger to 100%. I have a Ford Pro Connect charger and I get 10.3 kWh on a 50 amp circuit. Also, from one KC guy to another, congrats on the GTS. Were you at the 75 year get together at Aristocrat yesterday? If so, I saw your car and it looked great. It is tough to beat those GTS specific wheels. I was there with the grey Cross Turismo. To bad the weather was not better. Anyways, again congrats and welcome to the very small KC Cross and Sport Turismo club (I think we are the only members).

 

[daveo4EV]

Like the guys said, change charger to 100%. I have a Ford Pro Connect charger and I get 10.3 kWh on a 50 amp circuit. Also, from one KC guy to another, congrats on the GTS. Were you at the 75 year get together at Aristocrat yesterday? If so, I saw your car and it looked great. It is tough to beat those GTS specific wheels. I was there with the grey Cross Turismo. To bad the weather was not better. Anyways, again congrats and welcome to the very small KC Cross and Sport Turismo club (I think we are the only members).

I'd like to hear more about how you're getting 10.5 kw from a 50 amp circuit - that violates building code safety standards and thermal standards for a residential 240V circuit.

I'm not saying your incorrect - I'm suggesting somewhere in that installation there is a configuration error - 9.6 kW is the maximum amount of power available for a residential 50 amp 240V circuit.

and is that 10.5 kW as reported by the vehicle? Taycan or Ford?

personally I wouldn't do that unless I knew for a fact that the wire gauge between the circuit breaker and the Ford pro-EVSE was AWG 4 or 2…if it's AWG 6 or 8 that circuit is oversubscribed and the wire isn't thermally rated to carry that amount of current for hours on end with out eventual insulation failure and potential short circuit due to insulation failure being a potential future outcome…

 

[Leawood CT]

I'd like to hear more about how you're getting 10.5 kw from a 50 amp circuit - that violates building code safety standards and thermal standards for a residential 240V circuit.

I'm not saying your incorrect - I'm suggesting somewhere in that installation there is a configuration error - 9.6 kW is the maximum amount of power available for a residential 50 amp 240V circuit.

and is that 10.5 kW as reported by the vehicle? Taycan or Ford?

personally I wouldn't do that unless I knew for a fact that the wire gauge between the circuit breaker and the Ford pro-EVSE was AWG 4 or 2…if it's AWG 6 or 8 that circuit is oversubscribed and the wire isn't thermally rated to carry that amount of current for hours on end with out eventual insulation failure and potential short circuit due to insulation failure being a potential future outcome…

Dave, That is interesting information. I will start checking out what gauge the wire is immediately. I had all of the wire and new breaker installed by a master electrician a couple weeks ago, so I assumed all within normal code. The Ford Pro charger is actually running at 48 amp as that is what it is specifically set to. The reading I saw was reported on the Taycan. Screenshot below at rate of 10.2 currently.

 

[daveo4EV]

Dave, That is interesting information. I will start checking out what gauge the wire is immediately. I had all of the wire and new breaker installed by a master electrician a couple weeks ago, so I assumed all within normal code. The Ford Pro charger is actually running at 48 amp as that is what it is specifically set to. The reading I saw was reported on the Taycan. Screenshot below at rate of 10.2 currently.

that means more than 10.5 kW is being pulled/delivered-raw from the EVSE - 48 amps at 240 volts is 11,520 watts or 11.52 kW - that sort of electrical current load on 50 amp wire will thermally heat up the wire and thermally stress the insulation causing thermal expansion and contraction which over time can cause the insulation to fail…

check the circuit breaker size (I'm betting it's a 60 and not 50) and make sure the wire is rated for 60 amp loads based on local building codes for your region.

the problem with set ups like this is they work great right up until the moment they don't and then they fail…and it happens over time with no warning and normally at inopportune moments (Murphy's law).

the Ford Pro charger is _GREAT_ I love it - just makes sure the entire setup is "matched" - correct breaker size, correct wire gauge, and correct setting on the EVSE for the circuit.

Side Note: running a 48 amp EVSE on a 60 amp breaker with 60 amp rated gauge wire but "plugging it in" to a Hubble NEMA 14-50/6-50 is more of a grey area in my opinion - the Hubble commerical socket is "over spec" for 50 amp loads and is not going to fail with 48 amp current loads under any circumstance that is forseeable - the wire "in the wall" is the major concern for a potential short circuit.

 

[Leawood CT]

Dave, That is interesting information. I will start checking out what gauge the wire is immediately. I had all of the wire and new breaker installed by a master electrician a couple weeks ago, so I assumed all within normal code. The Ford Pro charger is actually running at 48 amp as that is what it is specifically set to. The reading I saw was reported on the Taycan. Screenshot below at rate of 10.2 currently.

Ok, so the wire is 6-3 W/G 600V wiring. It is quite thick. Pic below.

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