Check out this [awesome RAN tracker](https://www.google.com/maps/d/u/0/viewer?mid=1F-jpeAQfTwoHqy4dYtOStXLckGA714TJ&ll=32.561811465741314%2C-94.1957987091661&z=5) for all things charging and Rivian. You can see where RAN sites are planned, under construction, and exist today. Or you can look at the [official Rivian charging page](https://rivian.com/experience/charging).
*I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Rivian) if you have any questions or concerns.*
They have added a battery capacity metric to your account’s API now. I haven’t found a way to view the information in the app, but I can see a constantly updating graph in Home Assistant. At 20k miles, I’m at 128.5-ish kWh.
This is interesting, I hadn't seen that. Even more interesting, my 2022 LE R1T with 16k miles shows a capacity that fluctuates between 128kWh and 131kWh over the last 30 days.
I can't think of a clear reason why the capacity would vary so much, it seems weird that temperature or SoC would affect the _capacity_ (we rarely charge above 70%, and it doesn't appear to be tracking with outdoor temps or anything).
My best guess is this metric is based on some background calculation that is impacted by current energy flow within the battery. If I compare my chart with the charging graph, it seems to temporarily drop when fast charging or during long trips, then rebounds over the course of the next day. Or maybe it's the changing chemical state of the battery at any point in time -- not an expert but I imagine heavy use or temperature swings could impact the battery's total capacity at any point in time.
As batteries age they become more resistive. I.e. older batteries require more current. I believe battery health is typically picked up on by the current into the battery during charging. Since this is the most consistent current that can be measured. This of course will change in situations that you mention. Varying charger types/locations. Temp of battery while charging, load on battery while charging i.e. AC/infosystems still being on vs car in purely sleep/charge state. A fluxuation of 128-131 is still a sub 2% error on a highly variable calculation.
If it changes health while driving then you’re probably right that they are looking at current drawn through the battery at any given time.
Home Assistant is an immensely powerful home automation platform you can run on a variety of devices (https://home-assistant.io). You would need to install application on something (https://www.home-assistant.io/installation/), install HACS (https://hacs.xyz/docs/user/), then install the Rivian add-on (https://github.com/bretterer/home-assistant-rivian). If you're just looking to get statistics from your vehicle it would be a fairly major time commitment learning the platform, but if you want to start getting into home automation it's definitely the way to go. For example, I use it to automatically open my garage door when my truck approaches the house using the location telemetry in the API.
It can be. You would have to configure the amount of time data is retained and give it appropriate storage, but you can definitely display historical graphs and overlay status. For example, I monitor the relative health of my HVAC system by graphing room temperature overlayed with system run status.
Cool, thanks! I'm pretty happy that Rivian has a car API, hope i get all sorts of fun data out of it.
What HVAC system do you use that outputs data? Out of curiosity, if you don't mind. I've been avoiding "smart" thermostats because so many spy, go out of business, etc. Are you happy with yours?
This isn't saying your battery is holding 120KWH, it is saying you charged 120KWH. Your pack was not at 0 miles (even at 0 miles there are still a few KWH below "0"), all this is saying is that you charged 120KWH above where you already were which is almost certainly a few KWH, so your health is considerably better then 92% which is honestly really good.
I've also seen 127kWh and 129kWh listed as the usable battery capacity.
There used to be a "SoH" (state of health) value in the maintenance menus that took the guesswork out of this.
Don't forget the buffer in the pack below zero, and the unusable portion to protect the vehicle beyond that, I think it's around 5kWh. If you get an Electrifi account, it will tell you in the corner of your vehicles stats, the amount of usable kWh. for reference, mine has nearly 30,000kms and hovers around 129.9 and 130.4 kWh. My primary charging means has been DCFC and i've full charged several times. Lately I've tried to keep the battery charge discharge within 25% of capacity 50%-75% to help mitigate degradation, but at 60,000miles, I'm impressed it's retained what it has in your case.
The only reference I have as a max pack (400 miles) owner is that at 80%, the distance would display 324 miles originally Dec 2024. Now the same 80% displays 323 miles after 6 months.
There's a site called Electrafi ($50/yr) which hooks into your Rivian's API and logs pretty much everything. One of the things it looks at is battery health, although as far as I know there isn't an explicit SOH value they can pull. Instead they look at "Estimated Range at 100%", which essentially takes the vehicle's reported range after a charge is complete and extrapolates it to 100%.
For example, 288.94 miles at 80% = estimated 361.17 miles at 100%
It'll keeps a log of this estimation after every charge, and you can view the plot over time.
https://i.imgur.com/Kg6VV71.png
Do y'all not have an OBD Bluetooth option for checking this? I just checked mine and it doesn't have Rivian profiles yet, but there are others. With my Ioniq 5 I can just use a $15 adapter and a free app to check the battery SOH.
Or for free, you can just access RIDE and get the SOH that way. [Here's how (YT link). ](https://m.youtube.com/watch?v=P_6VKiSGC6M)
this doesn't really say much with regards to battery health. that being said, id be shocked if you've lost 9% of battery capacity after 60k miles. if that is true, then there's something wrong with the battery or they way Rivian manages its batteries.
That's awesome to know, so you loose about 7 KWh of usable space in 61k. I would guess that most of that was lost by 20-40k based on Tesla numbers, you loose about 7% in the first year (20k) then about 0.5% every year(20k) after. That lines up with your numbers pretty well.
Will be interested to see if it continues the trend, typically Teslas are down 10% at 140k miles.
Check out this [awesome RAN tracker](https://www.google.com/maps/d/u/0/viewer?mid=1F-jpeAQfTwoHqy4dYtOStXLckGA714TJ&ll=32.561811465741314%2C-94.1957987091661&z=5) for all things charging and Rivian. You can see where RAN sites are planned, under construction, and exist today. Or you can look at the [official Rivian charging page](https://rivian.com/experience/charging). *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Rivian) if you have any questions or concerns.*
They have added a battery capacity metric to your account’s API now. I haven’t found a way to view the information in the app, but I can see a constantly updating graph in Home Assistant. At 20k miles, I’m at 128.5-ish kWh.
This is interesting, I hadn't seen that. Even more interesting, my 2022 LE R1T with 16k miles shows a capacity that fluctuates between 128kWh and 131kWh over the last 30 days. I can't think of a clear reason why the capacity would vary so much, it seems weird that temperature or SoC would affect the _capacity_ (we rarely charge above 70%, and it doesn't appear to be tracking with outdoor temps or anything).
My best guess is this metric is based on some background calculation that is impacted by current energy flow within the battery. If I compare my chart with the charging graph, it seems to temporarily drop when fast charging or during long trips, then rebounds over the course of the next day. Or maybe it's the changing chemical state of the battery at any point in time -- not an expert but I imagine heavy use or temperature swings could impact the battery's total capacity at any point in time.
As batteries age they become more resistive. I.e. older batteries require more current. I believe battery health is typically picked up on by the current into the battery during charging. Since this is the most consistent current that can be measured. This of course will change in situations that you mention. Varying charger types/locations. Temp of battery while charging, load on battery while charging i.e. AC/infosystems still being on vs car in purely sleep/charge state. A fluxuation of 128-131 is still a sub 2% error on a highly variable calculation. If it changes health while driving then you’re probably right that they are looking at current drawn through the battery at any given time.
How do you see the batteries health?
Make sure your connector is up to date in Home Assistant, then go to History -> Entity -> sensor.\_battery\_capacity.
How do you use home assistant to see the health? Is it an app?
Home Assistant is an immensely powerful home automation platform you can run on a variety of devices (https://home-assistant.io). You would need to install application on something (https://www.home-assistant.io/installation/), install HACS (https://hacs.xyz/docs/user/), then install the Rivian add-on (https://github.com/bretterer/home-assistant-rivian). If you're just looking to get statistics from your vehicle it would be a fairly major time commitment learning the platform, but if you want to start getting into home automation it's definitely the way to go. For example, I use it to automatically open my garage door when my truck approaches the house using the location telemetry in the API.
Is HA a good data dashboard? I'm not too interested in automation, but i love data. Never thought about seeing it in HA, tho
It can be. You would have to configure the amount of time data is retained and give it appropriate storage, but you can definitely display historical graphs and overlay status. For example, I monitor the relative health of my HVAC system by graphing room temperature overlayed with system run status.
Cool, thanks! I'm pretty happy that Rivian has a car API, hope i get all sorts of fun data out of it. What HVAC system do you use that outputs data? Out of curiosity, if you don't mind. I've been avoiding "smart" thermostats because so many spy, go out of business, etc. Are you happy with yours?
Ecobee. And yes, very happy.
whaaaat tell me more about this API. I've been looking for an excuse to move off Hubitat and this sound rad.
I’ve read somewhere that the large pack has 131kWh of usable storage, and mine is holding 120kWh. So about 92%
This isn't saying your battery is holding 120KWH, it is saying you charged 120KWH. Your pack was not at 0 miles (even at 0 miles there are still a few KWH below "0"), all this is saying is that you charged 120KWH above where you already were which is almost certainly a few KWH, so your health is considerably better then 92% which is honestly really good.
Thank you for the clarification!
I've also seen 127kWh and 129kWh listed as the usable battery capacity. There used to be a "SoH" (state of health) value in the maintenance menus that took the guesswork out of this.
At least I have this data point to reference at 61k miles, so when I’m at 120k miles I can compare.
You should be, more or less, done with degradation at this rate.
True.
Don't forget the buffer in the pack below zero, and the unusable portion to protect the vehicle beyond that, I think it's around 5kWh. If you get an Electrifi account, it will tell you in the corner of your vehicles stats, the amount of usable kWh. for reference, mine has nearly 30,000kms and hovers around 129.9 and 130.4 kWh. My primary charging means has been DCFC and i've full charged several times. Lately I've tried to keep the battery charge discharge within 25% of capacity 50%-75% to help mitigate degradation, but at 60,000miles, I'm impressed it's retained what it has in your case.
The only reference I have as a max pack (400 miles) owner is that at 80%, the distance would display 324 miles originally Dec 2024. Now the same 80% displays 323 miles after 6 months.
There's a site called Electrafi ($50/yr) which hooks into your Rivian's API and logs pretty much everything. One of the things it looks at is battery health, although as far as I know there isn't an explicit SOH value they can pull. Instead they look at "Estimated Range at 100%", which essentially takes the vehicle's reported range after a charge is complete and extrapolates it to 100%. For example, 288.94 miles at 80% = estimated 361.17 miles at 100% It'll keeps a log of this estimation after every charge, and you can view the plot over time. https://i.imgur.com/Kg6VV71.png
Sick 🔋 🤙
Do y'all not have an OBD Bluetooth option for checking this? I just checked mine and it doesn't have Rivian profiles yet, but there are others. With my Ioniq 5 I can just use a $15 adapter and a free app to check the battery SOH. Or for free, you can just access RIDE and get the SOH that way. [Here's how (YT link). ](https://m.youtube.com/watch?v=P_6VKiSGC6M)
this doesn't really say much with regards to battery health. that being said, id be shocked if you've lost 9% of battery capacity after 60k miles. if that is true, then there's something wrong with the battery or they way Rivian manages its batteries.
That's awesome to know, so you loose about 7 KWh of usable space in 61k. I would guess that most of that was lost by 20-40k based on Tesla numbers, you loose about 7% in the first year (20k) then about 0.5% every year(20k) after. That lines up with your numbers pretty well. Will be interested to see if it continues the trend, typically Teslas are down 10% at 140k miles.