"Charge Speed Reduced" but is it really?

reallove

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#1
Hello!
Charging at home for the first time today! My landlord is an electrician and he installed a 50 A circuit along with a 14-50 NEMA connector.
When I charge, I see this warning on the screen. I did unplug and tried again a couple of times, but I see the same. Unsure if it's something on Tesla side or with the circuit. Anyone experienced this before?
Thanks!
img_6630-jpg.8779
 

Brokedoc

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#2
Hello!
Charging at home for the first time today! My landlord is an electrician and he installed a 50 A circuit along with a 14-50 NEMA connector.
When I charge, I see this warning on the screen. I did unplug and tried again a couple of times, but I see the same. Unsure if it's something on Tesla side or with the circuit. Anyone experienced this before?
Thanks! View attachment 8779
I don't want to doubt your landlord's install but what gauge wire did he use and how long is the run? If the wire is correct for the run and you keep getting the error, definitely have Tesla check out the car.
 

Brokedoc

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#5
Well, its still giving you 32/32 Amps, so no harm done!
I saw that also but I wonder if the 2nd gen UMC circuitry is detecting an issue. It could be a fire risk. I know the 1st gen UMC has circuits that detect extension cord use and won't charge.
 

garsh

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#6
I saw that also but I wonder if the 2nd gen UMC circuitry is detecting an issue. It could be a fire risk. I know the 1st gen UMC has circuits that detect extension cord use and won't charge.
IIRC, the connectors detect a larger-than-expected voltage drop as they pull more current. This is a sign that the run is too long, and/or the wiring isn't a large enough gauge.

But the screenshot you included shows 236 volts at 32 amps, so that seems perfectly fine. It's a mystery. Have Tesla take a look at your car if it keeps doing this.
 

reallove

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#7
I have a positive update! The warning disappeared later in the day and it didn't show up since. Phew!
Thank you all for responding on this! I love this community!
 

Toadmanor

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#8
question: Can one expect 28 mile per hour range increase with a 50A 14-50 NEMA circuit?

(I am trying to decide between installing one or buying a $500 Tesla Wall Charger.)
 

MelindaV

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#12

quadmasta

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#13
It depends on the state of charge of the car and the heat in the battery cooling system. 28-30 miles per hour should be expected.
 

garsh

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#15
Sorry I guess i was not clear. No comparison requested. Just wanted to know if one can expect an increase of 28 miles per hour range when using a NEMA 14-50 on a 50A circuit with a model 3.
Yes.
Here's the chart that Tesla made with average charging rates for various outlets.

 
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#16
Hello!
Charging at home for the first time today! My landlord is an electrician and he installed a 50 A circuit along with a 14-50 NEMA connector.
When I charge, I see this warning on the screen. I did unplug and tried again a couple of times, but I see the same. Unsure if it's something on Tesla side or with the circuit. Anyone experienced this before?
Thanks! View attachment 8779
I had a similar thing happen.. Saying the wall plug was too hot. Electrician came back and discovered the the guy that installed the outlet did not tighten the screws on the wire enough (It was him)! Had to get a new outlet and have been charging great ever since.. I am using 40 amp circuit and charging at 32Amp and 30 miles/hour..