GEN 1 R1T Home Charging Frustrations

[lmerani]

I am struggling to understand why my 2023 R1T Dual Max Performance doesn't charge above 10kW on the Tesla universal wall charger or the Autel Maxicharge 50A EV charger. I also have an EVIQO EV charger that the truck is able to pull 10.8kW consistently during every charge, but for some reason, it will not pull more than 9.8kW from the Tesla or Autel chargers even though they are both configured for the max charge rate and are on a 60A breaker.

I have the EVIQO charger at one of my residences, but went with the Tesla charger at another residence. When I realized the truck was not charging at the max rate for 50A EV charger, I researched and found similar experiences from other Rivian owners.I decided to try the Autel 50A charger instead, and again, installed it the same 60A breaker that the Tesla universal wall charger was wired to before. I saw a lot of good reviews on the Autel, but so far in my experience, it's not charging any faster than the Tesla charger.
The EVIQO charger is by far the most economical charger here, yet the truck is able to pull almost 11 kW from it without issue, consistently.
I went with the Tesla mainly for the built in universal connector and then with the Autel for the RFID card feature. Unfortunately, it looks like the premium EV chargers provide a lesser charging experience than the budget charger.
There are many EV owners reporting awesome success with the Tesla and Autel chargers, both with Tesla's and Rivians, but I don't know why my experience is different. And yes, the charge amp setting in my R1T is set to 48A.
I am aware of the home charging bug, but unless I misunderstand it, it seems to be affecting Gen 2, not Gen 1 R1's.

I am about to return both the Tesla and Autel charges and get another EVIQO charger, but I prefer the Telsa and Autel for the aforementioned reasons.

Am I doing something wrong or am I missing something obvious here?

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[VSG]

What's your voltage? Did you install these yourself? Are you using an adapter?

 

[mkhuffman]

It would be helpful to know how you installed the various EVSEs. Also, what is the charger pulling from the breaker box? Can you measure that?

I am sure you know there are losses in the charging process. I am charging at 48 Amps right now, and this is what the Rivian app reports :

This is what is is getting supplied to the EVSE:

 

[godfodder0901]

It would be helpful to know how you installed the various EVSEs. Also, what is the charger pulling from the breaker box? Can you measure that?

I am sure you know there are losses in the charging process. I am charging at 48 Amps right now, and this is what the Rivian app reports :

This is what is is getting supplied to the EVSE:

I pull 11.2-11.3 consistently at 48A.

 

[lmerani]

What's your voltage? Did you install these yourself? Are you using an adapter?

I had the Tesla charger professionally installed. The install included the 60A breaker, conduit, wiring, disconnect box outside and the EV charger.
I did the Autel swap myself.

Here are the voltages while the charger is charging.
Line 1 - 120.6V
Line 2 - 119.5V
207.1V across both lines.

 

[lmerani]

What's your voltage? Did you install these yourself? Are you using an adapter?

The Autel comes with the J1772 plug, so no adapter is required.
For the Tesla charger, I just used the built in J1772 adapter.

 

[bfilippo]

Hmm, that is strange, but it does seem that YMMV. I have the 3rd gen Tesla wall charger from our former MYLR (non-universal), and utilize the j1772 adapter from A2Z on our Gen 1 and then no adapter on my Gen2 with NACS. I pretty consistently get 10.7kw on both vehicles at 48amps on 60amp breaker.

 

[RickRivian]

Not an electrician, but 207v x 48amps = 9.9kW. 240v x 48 = 11.5kW. That is at the house, before ~7% loss.

Is this at a commercial building?

 

[lmerani]

It would be helpful to know how you installed the various EVSEs. Also, what is the charger pulling from the breaker box? Can you measure that?

I am sure you know there are losses in the charging process. I am charging at 48 Amps right now, and this is what the Rivian app reports :

This is what is is getting supplied to the EVSE:

I fully expect some losses

Not an electrician, but 207v x 48amps = 9.9kW. 240v x 48 = 11.5kW. That is at the house, before ~7% loss.

Is this at a commercial building?

It's a shop on our property and it was wired for 3 phase. This makes sense. Not a charger or Rivian issue then. Since it has 3 phase, I should have just installed a DC charger instead.

 

[hudesigns]

I had the Tesla charger professionally installed. The install included the 60A breaker, conduit, wiring, disconnect box outside and the EV charger.
I did the Autel swap myself.

Here are the voltages while the charger is charging.
Line 1 - 120.6V
Line 2 - 119.5V
207.1V across both lines.

207V seems low. I might not be correct but when I charge using Grizzle mini 40A charger the average voltage is 236V and get bit above 9kw. Your 207V x 48A= 9.9kw with some loss it should be around 9.6kw. Maybe you take a voltage test when EVIQO is charging to see what voltage is pulls.

 

[mkhuffman]

I fully expect some losses

It's a shop on our property and it was wired for 3 phase. This makes sense. Not a charger or Rivian issue then. Since it has 3 phase, I should have just installed a DC charger instead.

Install a DC charger that can also tap into the battery so you can do VTBuilding (not VTH, since it is not your home). I would love to do that but $10-20k just doesn't seem worth it right now. It might even be more since I only have 200 Amp service.

 

[RickRivian]

I fully expect some losses

It's a shop on our property and it was wired for 3 phase. This makes sense. Not a charger or Rivian issue then. Since it has 3 phase, I should have just installed a DC charger instead.

3 phase is the answer. Simple math.

 

[Erik+]

You should be getting above 237V or so and it looks like you are only pulling 207V. I would work from the panel back out to the charger and see what readings you are getting. Chances may be that the voltage drop is occurring well upstream of your chargers.

 

[lmerani]

I am going to ask the electrician to look at it again just to be certain, but based on the comments here and the math, it appears to be the nature of 3 phase power. I am fine with the lower power numbers this as long as it's not a charger or vehicle issue.

 

[VandalSibs]

I am going to ask the electrician to look at it again just to be certain, but based on the comments here and the math, it appears to be the nature of 3 phase power. I am fine with the lower power numbers this as long as it's not a charger or vehicle issue.

No need to call the electrician - it's very much because of three-phase power. You see the same kind of voltages with Level 2 chargers at parking garages and other commercial buildings because of that.

The DC option would be interesting, but has been mentioned it's really expensive for what you are getting (only about 25kW from what I'm seeing in a quick "I'm just getting clocked in at work" search).

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