Charge Current Changed On It’s Own

[SunCharged]

Anyone else have their “charge current” selection change on its own when charging at home with the HPWC?

I’ve only had this happen twice in over a year, but both times have been recent. The car is scheduled to start charging at midnight and I wake up and the charge current has changed to 13a. Once I go into the charging screen I can manually change it back to 48a and all is good.

 

[Rocky_H]

Is the charge port light orange when it has done that? I think the 13A symptom may go with if people haven't gotten the plug solidly all the way into the charge port, and the car was not able to properly latch onto it, so it pulls back the amps a lot to be very cautious about a not fully inserted plug.

 

[jmaddr]

I had the max amperage change on me both times I visited a supercharger. Both times it dropped to around 8A or thereabouts. Same thing as you, just went in and changed it back.

 

[SunCharged]

Is the charge port light orange when it has done that? I think the 13A symptom may go with if people haven't gotten the plug solidly all the way into the charge port, and the car was not able to properly latch onto it, so it pulls back the amps a lot to be very cautious about a not fully inserted plug.

I didn’t even look at the charge port. Just went in the car, made the change and all was good. I’ll definitely look at that next time though. Thanks for the heads up.

 

[Rocky_H]

I had the max amperage change on me both times I visited a supercharger. Both times it dropped to around 8A or thereabouts. Same thing as you, just went in and changed it back.

The user does not get an option to change the amps when using a Supercharger, so I don't know what you're talking about. Something isn't right there.

 

[animorph]

Feel the charge handle, wires, and HPWC. The car will drop the current if it detects a significant voltage drop. It could be a loose connection.

 

[jmaddr]

The user does not get an option to change the amps when using a Supercharger, so I don't know what you're talking about. Something isn't right there.

Sorry. I meant my next charge at home after supercharging. I was able to change the amps on my first charge at home right after supercharging. I don't charge every day and have only supercharged three times in three months. For at least the last two, on my next charge at home on my HPWC I noticed the reduced charge rate and had to simply up it back on the in-car screen. The second time I did it I used the Stats app since I was checking it from my bedroom.

 

[Magnets!]

I notice on my charge screen it always shows 5a, until I plug in and then it goes back to the default I previously set of 30a.

 

[Bandit]

I've had the same drop to 13A as well, twice. Both times were about a month or two ago. There was another thread around then. Today I noticed mine set itself to 36. I'm always able to re-up it and I'm pretty sure everything is plugged in tight.

 

[SunCharged]

I've had the same drop to 13A as well, twice. Both times were about a month or two ago. There was another thread around then. Today I noticed mine set itself to 36. I'm always able to re-up it and I'm pretty sure everything is plugged in tight.

I just had it happen again two nights ago. Everything was plugged in tight and charging resumed at full speed once I changed the setting back to 48a.

 

[Saghost]

The car will drop the current when it sees what it believes are excessive voltage drops in an attempt to prevent a meltdown/fire.

If that has happened in the same place multiple times, I'd go check the wiring carefully.

Watch the car load the line and see how big the voltage drop actually is, too.