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Rivian Home Charger running at 10.5 kW instead of 11.5 kW

MidnightRivian

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I just noticed the last couple days my Rivian home charger is charging 1 kW slower @ 10.5 kW instead of 11.5 kW.

The car shows 10.5 kW now and charger settings still shows 11.4 kW


It’s always charged at 11.5 kW and no changes have been made to the original install.

I verified the dip switches are set to 48 A default setting and sent pictures of the breaker, charger install, and the inside, including the dip switches to the Home charging team so they can investigate further.

Hopefully they just need to push an update and let it charge back at the normal speed.

The temperature in the garage is 82° and not hot enough for it to throttle down to 8 kW because of a warm plug.

I’ve cycled the amp limit settings from high to low with no difference.

Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6127
Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6124




EDIT:

Responses from Rivian

When reviewing your recent session history, it appears that your charger is more often getting closer to 11.5 kW and is dropping to slower rate on few occasions to the ~10 kW mentioned. I do see that the average under load is about ~242 volts and ~47A throughout the duration of the charge time. The charger will have some dips on occasion through the session, but the average speeds seem to be reflecting as normal.

Off hand there aren't irregularities that I see are cause for concern based on review of the charge history and images provided of your installation. However, as a precaution I will send this data to our teams to see if this is something that is more Wall Charger or vehicle focused.


2nd response from Rivian after my inquiry was sent to another team.


Hope you're well. We recently updated the way AC charging speeds are displayed in the vehicle and mobile app which is why you may see a different kilowatt (kW) charging speed than you have in the past.

The charging speed delivered by your charger and the speed at which your vehicle accepts energy has not changed. We're continuing to evaluate the way we're displaying AC charging speeds, and plan to roll out additional improvements in the future.


1 hour charging test and 3 hour charging test

Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW img_6131-


Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW 1699714852297
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Riviot

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I've noticed the same since the last update, but mine turns on late at night with lower TOU rates, so I forget to mess with it. But try manually adjusting down to 40 and back up to 48, that might fix it.
 

pc500

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The spikes look like thermal throttling, but is this residential on single phase 240v power and not a 208v condo? The latter will see 10kw since a recent more accurate metering upgrade.
 
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MidnightRivian

MidnightRivian

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I've noticed the same since the last update, but mine turns on late at night with lower TOU rates, so I forget to mess with it. But try manually adjusting down to 40 and back up to 48, that might fix it.
Tried adjusting amperage and it made no difference in kW.

what did help slightly was to wait few hours and charge again. Speeds went up to 10.7 kW - 10.8 kW.


The spikes look like thermal throttling, but is this residential on single phase 240v power and not a 208v condo? The latter will see 10kw since a recent more accurate metering upgrade.
Just your standard 200 AMP Single Family Home residential. Here is the screenshot showing 245 volt and 48 amp / 11.6 kW direct from the charger. The car is only registering 10.7 kW now.

battery temps show 98 degrees.

once in a while it shows 11.6 kW and throttles back down to the 10.7 kW

Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6133
Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6136
Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6135

Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6137
 

pc500

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Tried adjusting amperage and it made no difference in kW.

what did help slightly was to wait few hours and charge again. Speeds went up to 10.7 kW - 10.8 kW.




Just your standard 200 AMP Single Family Home residential. Here is the screenshot showing 245 volt and 48 amp / 11.6 kW direct from the charger. The car is only registering 10.7 kW now.

battery temps show 98 degrees.

once in a while it shows 11.6 kW and throttles back down to the 10.7 kW

IMG_6133.jpeg
IMG_6136.png
IMG_6135.jpeg

IMG_6137.png
The only thermal throttling I'm aware of is when the connector itself gets hot to the touch. But usually this is only in the summer or in the Sun. Any chance you have a buddy with a charger or something to test and see if it's your charger or your truck?
 

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same thing starting happening to me after the 2023.34 update. its never gone up past 10.5 since that update. before that it was always at 11.3/11.4. i have the Emporia charger at home on a 60amp breaker and the charger is showing 11.3 kw
 
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R1Tom

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Mine is doing exactly same thing since the last update.
 
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MidnightRivian

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This morning I was as able to hit 10.9 kW instead of 10.5 kW or 10.8 kW. Charger still shows 11.6 kW and 48 Amps. Car is showing around 1 kW less.

Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6141
Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6142
 

NC-Rivian

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Yep, 10,5 for me too. The only thing that has changed is the .38 update.
 

virgnia_rivian

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We are experiencing the same issue, but ours is topping out at 9.8. This has only been happening since the last update. The charge session also shows up differently in the graph in the app with just a few bars, versus a prolonged charge time. (This could be from the app update)
 

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Mine is stuck at 10 actually.
 

NoGoingBack

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Stuck between 10 to 10.5 myself since .38. Last charge was 10.3. Used to get at least 11.1.
Noticed the same change with the charge rate indicator since .34. It only shows a few bars instead of multiple bars across the entire charge time.
 

emoore

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Same. Mine used to be 11 kw now it’s showing 10 kw but still says 25 mph so I’m not sure if it’s just a display issue or if it’s actually charging slower.
 

SANZC02

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Curious are people seeing slower charging or just lower number displayed.

It is hard to tell because the history shows plugged in time not charging time but when I look at the ones where I unplugged to stop charging I’m seeing about the same rate of charging based on kW delivered even though my number when charging displays lower in the app.
 
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MidnightRivian

MidnightRivian

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Curious are people seeing slower charging or just lower number displayed.

It is hard to tell because the history shows plugged in time not charging time but when I look at the ones where I unplugged to stop charging I’m seeing about the same rate of charging based on kW delivered even though my number when charging displays lower in the app.
My app shows 11.1 kWh delivered after one hour.

Rivian R1T R1S Rivian Home Charger running at 10.5 kW instead of 11.5 kW IMG_6131
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