What I learned from my 12V battery swap

[zigzagzap]

Thanks for the writeup though I have a question regarding the error codes.

Does a hard reset not clear these out?
According to these guys (https://www.ohmmu.com/product-page/12v-lithium-battery-2-pack-for-rivian-r1t-r1s) you can swap the batteries and perform a reset and it takes care of any error codes.
So why is your situation different or are they incorrect?

I do like Ohmmu 12V LiFePO4 batteries. I plan to upgrade my batteries soon after my S arrives. Yours in an interesting questions about the hard reset procedure. As the video points out the secondary battery on the passenger side is done first to mitigate some of the errors. Seems very straight forward and the reduction of weight (about 15 lbs) is also a plus.

I would personally love to get rid of the third row seats again for weight reduction since I will probably not every use them. Has anyone removed the third row seats?

(edited for grammar)

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[Kuro-Rivian]

I do like the Ohmmu and I plan to upgrade my batteries soon after my S arrives. Yours in an interesting questions about the hard reset procedure. As the video points out the secondary battery on the passenger side is done first to mitigate some of the errors. Seems very straight forward and the reduction of weight (about 15 lbs) is also a plus.

I would personally love to get rid of the third row seats again for weight reduction since I will probably not every use them. Has anyone removed the third row seats?

I'm far from an expert, I know enough to be dangerous (this is SO true!) but I'd be cautious about doing that. We don't know if the Rivian BMS for the 12v has the capability to charge a lithium battery correctly.

 

[Kuro-Rivian]

Are they conventional automotive trim panel clips or something special that would need to be sourced from Rivian? I am really interested to see more of what is under the skin but am reluctant to break a bunch of clips and connectors that are not designed for graceful removal.

They are pretty standard. There is a black one and a white one. Here is an actual pic of the black one and something similar out of a dodge that I found with a quick search that probably does the trick. You won't break all of them, probably need a handful to replace.
https://www.clipsandfasteners.com/Door-Panel-Retainer-Clips-Chrysler-p/pas2063-50.htm

 

[Kuro-Rivian]

I do like Ohmmu 12V LiFePO4 batteries. I plan to upgrade my batteries soon after my S arrives. Yours in an interesting questions about the hard reset procedure. As the video points out the secondary battery on the passenger side is done first to mitigate some of the errors. Seems very straight forward and the reduction of weight (about 15 lbs) is also a plus.

I would personally love to get rid of the third row seats again for weight reduction since I will probably not every use them. Has anyone removed the third row seats?

(edited for grammar)

For example, I have both LiFePo4 batteries and standard AGM batteries in my RV & car trailer. I know in that instance I have to use an integrated Battery Isolator/BMS so it maintains both batteries at the correct charge. But again, you may be way better versed in it than me.

 

[Yossarian]

. . .
I would personally love to get rid of the third row seats again for weight reduction since I will probably not every use them. Has anyone removed the third row seats?

(edited for grammar)

I know this is a thread about the 12v batteries, but I too do not need the third row and would like to know if they can easily be removed.

 

[Kuro-Rivian]

I know this is a thread about the 12v batteries, but I too do not need the third row and would like to know if they can easily be removed.

I don't know. It seems like a Catch 22 Yossarian!

 

[DuoRivians]

There was a post by someone the other day, who claimed the new Rivians now only have one 12v battery. Not sure if that’s true or not.

Person claimed this is what a Rivian technician said after a recent visit to Normal factory

 

[Kuro-Rivian]

There was a post by someone the other day, who claimed the new Rivians now only have one 12v battery. Not sure if that’s true or not.

Person claimed this is what a Rivian technician said after a recent visit to Normal factory

Dang, I don't know what wrong with me this morning! I am sick as a dog but I had meant to mention this as well. Mobile tech did say that.

 

[zefram47]

There was a post by someone the other day, who claimed the new Rivians now only have one 12v battery. Not sure if that’s true or not.

Person claimed this is what a Rivian technician said after a recent visit to Normal factory

Dang, I don't know what wrong with me this morning! I am sick as a dog but I had meant to mention this as well. Mobile tech did say that.

Did they indicate when that might have happened? I take delivery on Tuesday and it was supposedly built mid-February.

 

[Kuro-Rivian]

Did they indicate when that might have happened? I take delivery on Tuesday and it was supposedly built mid-February.

No sorry. It could be next week or next year. No indication of when.

 

[Dark-Fx]

There was a post by someone the other day, who claimed the new Rivians now only have one 12v battery. Not sure if that’s true or not.

Person claimed this is what a Rivian technician said after a recent visit to Normal factory

Another Sandy Munro casualty?

 

[PappaBolt]

Another Sandy Munro casualty?

This seems to make sense for cost saving. Or maybe I don’t understand the use case for needing two batteries.

 

[Tatnai]

Did they indicate when that might have happened? I take delivery on Tuesday and it was supposedly built mid-February.

I take delivery tomorrow and now I feel like after years of knowing everything, my R1S may or may not have 12v in the fronk/under the dash, it has a different sound system, now maybe only one 12v battery, different shock air compressors, what else?? Going to be an adventure.

 

[zefram47]

Another Sandy Munro casualty?

Honestly, with some of the weird 12V issues that have happened I'd imagine more than cost savings it just makes sense to unify the 12V subsystems rather than leaving half the truck operating on one battery and the other half on another. Some have said that the jump leads at the rear only work on one battery and not the other for starters. That said, I'd hope they increased the capacity of the single battery to match the twin setup.

 

[DuoRivians]

If Rivian gets one 12v battery to work fine, I think that’s better. The two batteries do not serve as redundancy, and both have to work for the vehicle to work.

If the probability of one battery failure is p, then probability of working is (1-p).

(1-p) is always greater than (1-p)^2, which is the probability that both batteries work in a two battery situation.

So, one battery approach would seem better than two

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