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mkhuffman

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@Rivian Roamer - I didn't see you promote this yet, so I thought I would do it for you!

I currently subscribe to Teslafi (Electrifi) for data capture, but if this can replace that, that would be great!

One of the things I hope we can track is HVB State of Health.

Rivian R1T R1S Rivian Roamer Plus - I just signed up! 1759777527744-1l
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KRIV_ian

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I'm thinking about signing up but was wondering what the drive sessions and charge sessions look like, i.e. how is the data presented and how well can you interact with it. I didn't see any screenshots so hopefully @Rivian Roamer or someone can upload some.
 
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mkhuffman

mkhuffman

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I'm thinking about signing up but was wondering what the drive sessions and charge sessions look like, i.e. how is the data presented and how well can you interact with it. I didn't see any screenshots so hopefully @Rivian Roamer or someone can upload some.
I will be doing a 140-mile drive tomorrow, and if nobody has posted anything yet, I will. I just signed up and won't be driving the rest of the day.
 

Rivian Roamer

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@Rivian Roamer - I didn't see you promote this yet, so I thought I would do it for you!

I currently subscribe to Teslafi (Electrifi) for data capture, but if this can replace that, that would be great!

One of the things I hope we can track is HVB State of Health.

1759777527744-1l.webp

I'm not a big fan of self-promotion. I'd rather the product speak for itself but thank you, it really means a lot. You should use your referral code, though ;). Go check out your profile for that. I'll be awarding both the referrer and the referee $4.99 for a successful month of Plus service. The automated part of that isn't done but I will retroactively award people the amounts.

Regarding battery health. It's tricky, there is currently no good way to calculate it. Anyone telling you otherwise isn't telling the whole truth. Even if you go to that Vehicle Details link you'll notice my warning. Rivian Roamer communicates battery capacity but it's net not gross. Net of what, no one knows. My R1T TrI Max has seen the capacity go from 134 kWH to 144 kWh, varied with temp. My guess is that Rivian has a reservation system that pulls aside some capacity in colder weather. But that process is opaque. Until I can get enough data to be at least somewhat accurate and precise. I don't feel it's the right thing to do to communicate something I know isn't true to customers. It's something I'm working on, but as of right now I don't have a good answer for.

Regarding Charging/Driving sessions, here you go. Note that the better part of 5 months has been spent really nailing down the data gathering and data model. I'm gathering so much more than I'm showing. I even store data in 5-second intervals for high precision. So that means the presentation side of features aren't where I'd like them to be but, if you sign up you'll start gathering data from today and I can always present that in the future. One such example of this is towing. I've always had the data but only recently added indicators to sessions when towing was detected. I also log the wheel/tire config from Rivian at any given point so I'll be able to automatically generate wheel/tire based reports in the future.

The below screenshots are running on my local environment showing off a feature I'm about to push, estimated costs to charging/driving sessions.

Rivian R1T R1S Rivian Roamer Plus - I just signed up! Screenshot 2025-10-06 at 2.21.32 PM
Rivian R1T R1S Rivian Roamer Plus - I just signed up! Screenshot 2025-10-06 at 2.21.23 PM
Rivian R1T R1S Rivian Roamer Plus - I just signed up! Screenshot 2025-10-06 at 2.21.13 PM
Rivian R1T R1S Rivian Roamer Plus - I just signed up! Screenshot 2025-10-06 at 2.20.51 PM
 
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mkhuffman

mkhuffman

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@Rivian Roamer - thank you for continuing to dig through the data to see what can be tracked. I guess the value reported by Electrifi is probably suspect, and probably explains why Electrifi does not report total HVB capacity or SoH. I would like to track maximum capacity reported from the truck, which potentially will decrease over time as the battery degrades.

Rivian R1T R1S Rivian Roamer Plus - I just signed up! 1759799495978-ou


I ended up doing a short drive tonight and can share what was recorded:

Rivian R1T R1S Rivian Roamer Plus - I just signed up! 1759799659787-6a



As you recommended, I am sharing my referral code: MKHUFFMAN2000.
 

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KRIV_ian

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Thanks to you both for uploading the screenshots. I'm going to sign up tonight and see how it goes for my road trip this week.
 

Rivian Roamer

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Thanks to you both for uploading the screenshots. I'm going to sign up tonight and see how it goes for my road trip this week.
If you have any feedback, feel free to DM me. :)
 

zefram47

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I'm also an ElectraFi user. Wouldn't mind switching to a Rivian-specific product if it's comparable. I really like their features for tracking efficiency by tire set, tracking/aggregating road trips over multiple days, temperature/speed efficiency, etc. It's also great for aggregating daily, monthly, and yearly drive/charging stats for home and travel charging. Personally, I use the monthly home charging aggregate as a proxy for how much I "owe" the household fund for my charging in a given month. The lifetime travel map is cool too. I totally understand you've just started adding features, but I'm not totally sure what level of feature parity it would take to get me to switch yet. In any case, I do love that you've taken on this project and hope to see it grow in both features and user-base, from one developer to another.

Given that ElectraFi is first a Tesla app, there is a lot of nuance with their system that doesn't always work well with Rivians. For instance, it looks like they dropped support for tracking drive modes for efficiency data. I recently bought a car hauler trailer and have been towing more. If there were a way to track drive data in aggregate separately for towing vs unladed driving, that would be a big deal to me. Honestly not sure if that is an item exposed in the Rivian API, @Rivian Roamer.
 

krb1183

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I also signed up. Currently on a road trip so am excited to see what it looks like after I make it home tomorrow eve.
 

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Rivian Roamer

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I also signed up. Currently on a road trip so am excited to see what it looks like after I make it home tomorrow eve.
Let me know what you'd like to see! About to push the change to support setting a kWh price to show estimated costs for both drives and charges.
 

Rivian Roamer

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I'm also an ElectraFi user. Wouldn't mind switching to a Rivian-specific product if it's comparable. I really like their features for tracking efficiency by tire set, tracking/aggregating road trips over multiple days, temperature/speed efficiency, etc. It's also great for aggregating daily, monthly, and yearly drive/charging stats for home and travel charging. Personally, I use the monthly home charging aggregate as a proxy for how much I "owe" the household fund for my charging in a given month. The lifetime travel map is cool too. I totally understand you've just started adding features, but I'm not totally sure what level of feature parity it would take to get me to switch yet. In any case, I do love that you've taken on this project and hope to see it grow in both features and user-base, from one developer to another.

Given that ElectraFi is first a Tesla app, there is a lot of nuance with their system that doesn't always work well with Rivians. For instance, it looks like they dropped support for tracking drive modes for efficiency data. I recently bought a car hauler trailer and have been towing more. If there were a way to track drive data in aggregate separately for towing vs unladed driving, that would be a big deal to me. Honestly not sure if that is an item exposed in the Rivian API, @Rivian Roamer.
Towing is something I already have support for and have been logging since day 1.

 

technerd

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I'll probably check it out at some point here. Been using Electrifi and previously TeslaFi for years now, love the nerdy data, of course I just realized my yearly Electrifi renewed yesterday... bad timing
 

Rivian Roamer

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I'll probably check it out at some point here. Been using Electrifi and previously TeslaFi for years now, love the nerdy data, of course I just realized my yearly Electrifi renewed yesterday... bad timing
I’ll soon have data imports.
 

zefram47

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I’ll soon have data imports.
Now that would be sweet. That other site didn't become available until later in my first year of ownership, but I'd love to maintain a long history of data with whatever platform I keep using.
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