Reduced Amperage Setting for Charger

[BruceR61]

I've had my MS 75 since March 18. I have a NEMA 14-50 with the charger that came with the car. It has always used 40A. I noticed yesterday it took a longer time to charge overnight. This morning I noticed that the setting or my charger at been reduced from 40A To 30A. Curious if the last software update did that without my noticing? If your car has been charging slow you might want to check this out.

 

[TexasEV]

No, it means the car detected an anomaly with your power. If it happens routinely you need to get it checked out. Search "40A charging reduced to 30A" for dozens of posts on this topic.

 

[BruceR61]

No, it means the car detected an anomaly with your power. If it happens routinely you need to get it checked out. Search "40A charging reduced to 30A" for dozens of posts on this topic.

Thanks. I will check out the other topics (and potentially clean the charge port and connector).

 

[Pbaker]

Check the connections on the outlet, make sure they are tight!

WITH THE POWER TURNED OFF!!

 

[brkaus]

Check for heat while charging. Outlet, breaker, cord.

You can set it back to 40+ manually and see if it drops again. Possibly low voltage in the neighborhood.

 

[BruceR61]

Seems ok now. I will clean the connection but it worked at 40A last night.

 

[Skipdd]

I've had my MS 75 since March 18. I have a NEMA 14-50 with the charger that came with the car. It has always used 40A. I noticed yesterday it took a longer time to charge overnight. This morning I noticed that the setting or my charger at been reduced from 40A To 30A. Curious if the last software update did that without my noticing? If your car has been charging slow you might want to check this out.

This happens to me periodically, in fact it happened today. As others have noted, I just adjust the amperage back to 40 and its ok. I'm pretty sure it's power spikes. When I got up today, I noticed the power had gone off at 6:08a (clocks on ovens were flashing). Because this continues to happen, I am going to talk to my electrician about putting something on the circuit to potentially stop this. I can think of a couple of options but we'll see what they say.