Slow Charging/Warm Plug on Rivian Home Charger

[Semibruce]

I'm curious if others have this issue and/or if it's related to any regent updates. I regularly get my home charging speed derated due to a warm plug. Charging starts around 11 kW (~48A) and derates to 6-7 kW and 30A. It looks like this happens when the plug reaches 100 degrees.

Yesterday, I charged at a hotel with a Tesla L2 charger. It seemed to maintain about 9 kW for several hours. It also possible there was more air flow to cool the plug.

I'm coming up on 2 years of home charging and only first noticed the issue over the summer when the ambient temperature of the garage was 90+ degrees. I didn't think much of it at the time. Now it much cooler.

Sponsored

 

[JeepEVer]

My NEMA 14-50 outlet had some visible wear from heat after years charging my Tesla. The Tesla app alerted me to this overheating issue. Maybe your connection is aging prematurely and needs to be replaced.

 

[Semibruce]

My NEMA 14-50 outlet had some visible wear from heat after years charging my Tesla. The Tesla app alerted me to this overheating issue. Maybe your connection is aging prematurely and needs to be replaced.

Interesting, thanks. I'll look into it.

 

[PaythePiper]

Funny you bring this up. A problem I’ve had for a while now just happened. I haven’t been able to set to 48a this summer or my charging stops. At almost 39 min every single time. Tesla on the same charger? No problems at 48 amps. My guess is Rivian changed the thresholds for L2 charging with adapters ( I use a Tesla universal charger). Temps dropped a lot the last couple days here so I said screw it, let me try 48a again. Nope. Stopped right about 30 minutes. Felt my charger, not warm at all. Touched the conduit where my wiring is, nope cool to the touch

 

[MMC3]

I have the same issue with my Rivian home charger. My R1S Gen1 drops the charge rate after about 30-40 min. My Tesla model Y with an adapter can charge for extended period with no reduction to charge speed. Don't know why this is happening. The R1S has been checked out to be ok by Rivian. I think Rivian has poor thermal management.

 

[Semibruce]

In my case, it looks like it hit close 115 degrees when the charging slowed. It dropped just under 100 after a while.

 

[PaythePiper]

I have the same issue with my Rivian home charger. My R1S Gen1 drops the charge rate after about 30-40 min. My Tesla model Y with an adapter can charge for extended period with no reduction to charge speed. Don't know why this is happening. The R1S has been checked out to be ok by Rivian. I think Rivian has poor thermal management.

Lmao. I’ve been talking smack of Rivian’s shit thermals for over a year. Rivian fanboys just spit in my face. You and I know the truth

 

[MMC3]

 

[MMC3]

The same home charger doesn't even get warm when charging the Model Y for long periods.

 

[tplociniak]

This is for sure an issue with the Rivian. My truck is a little over 3 years now, first year and a half, no issues with charging speed for 2 summers charing outside. Then this last year within 45 minutes or so of charging I get that alert. Have charged 2 other EV's on my charger and no issues for either of them. Have the Rivian charger installed since day 1. I will even get this alert in moderate temperatures as well.

 

[JeepEVer]

Funny you bring this up. A problem I’ve had for a while now just happened. I haven’t been able to set to 48a this summer or my charging stops. At almost 39 min every single time. Tesla on the same charger? No problems at 48 amps. My guess is Rivian changed the thresholds for L2 charging with adapters ( I use a Tesla universal charger). Temps dropped a lot the last couple days here so I said screw it, let me try 48a again. Nope. Stopped right about 30 minutes. Felt my charger, not warm at all. Touched the conduit where my wiring is, nope cool to the touch

My hardware was not warm to the touch either. But there was visible color change at the plug holes.

Note i only have Tesla products until R2.

 

[khenry]

Reach out to Rivian. I had the same issue several months ago and Rivian sent a new home charger under warranty.

 

[ebellinder2]

I'm curious if others have this issue and/or if it's related to any regent updates. I regularly get my home charging speed derated due to a warm plug. Charging starts around 11 kW (~48A) and derates to 6-7 kW and 30A. It looks like this happens when the plug reaches 100 degrees.

Yesterday, I charged at a hotel with a Tesla L2 charger. It seemed to maintain about 9 kW for several hours. It also possible there was more air flow to cool the plug.

I'm coming up on 2 years of home charging and only first noticed the issue over the summer when the ambient temperature of the garage was 90+ degrees. I didn't think much of it at the time. Now it much cooler.

I notice my R1t charges at 10.7 kw in the garage level 2 Tesla wall connector. The J1772 plug is warm but not hot. Now if I attempt to charge outside my garage in the sun the system derates to a lower amperage charge just due to the radiant heat on the cord and plug from the sun. Appears just very sensitive and has done this for as long as I have had my 2022 truck.

 

[proto]

I had this precise issue for over a year before I finally got around to calling Rivian a couple of months ago. They had me send them a photo of the charger with the cover off and of my breaker box. A day later they informed me they were sending me a new charger, under warranty. The new one works perfectly.

 

[Semibruce]

I had this precise issue for over a year before I finally got around to calling Rivian a couple of months ago. They had me send them a photo of the charger with the cover off and of my breaker box. A day later they informed me they were sending me a new charger, under warranty. The new one works perfectly.

I called them earlier and going through that now. Funny enough, I had logged over 800 charging sessions with this charger on ElectriFi l. (I charge daily, and many were scheduled climate control.) I filtered on sessions where more than 5 kWh was added and it's clear something changed earlier this year. Interestingly, there were several times in the summer months when the charger was working properly (I think) that it derated due to heat.

Anyway, it's probably overkill but I'm armed with data to make my case if needed.

Sponsored