Tested: 2%-93% Charging Curve After 2025.18.30 Update (on Standard LFP)

[LukeNowland]

TLDR: Rivian said to expect 10%-80% in 27 minutes, and that’s about exactly what I saw.

Decided to test Rivians claims on the increased charging performance the other night. I was not technically able to precondition the pack, but I arrived at around 90 and outside temp was 70 so I don’t think it made a real difference.

Here is the curve data written out and deciphered.

Time/Rate/SoC

0:00 -000kw - 2%

2:00 - 213kw - 4%

5:00 - 215kw - 13%

7:00 - 216kw - 19%

8:00 - 217kw - 24%

10:00 - 221kw - 30%

11:00 - 203kw - 35%

13:00 - 213kw - 41%

15:00 - 176kw - 47%

16:00 - 161kw - 52%

18:00 - 142kw - 57%

19:00 - 129kw - 61%

21:00 - 107kw - 65%

22:00 - 99kw - 69%

24:00 - 94kw - 72%

26:00 - 88kw - 75%

27:00 - 80kw - 77%

29:00 - 76kw - 79%

30:00 - 72kw - 82%

32:00 - 71kw - 84%

34:00 - 63kw - 86%

35:00 - 61kw - 88%

37:00 - 60kw - 90%

38:00 - 57kw - 91%

40:00 - 57kw - 93%

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[LukeNowland]

Side note: Rivian, why couldn’t you just make a normal x-axis. Is it really a programming miracle to ask for 1 minute increments?

 

[Mellowyellow]

Dude no wonder you couldn’t pre condition the pack. You rolled in on 2%?!? You have huge cojones

 

[C12farmer]

Thanks for posting this. I do think preconditioning forces the car to even out the pack temperature more than you can see.

Would be interested to see a charging curve from ABRP data. That gives a data point every 5-6 seconds.

10-60% still seems like the charging sweet spot, if you can make it to chargers within that use range.

 

[Riviot]

How many Margarita Lifts can you do in a charging session? My PR is 3.

 

[savethemanual]

I'm sure you're not getting behind the wheel after that 3 Margarita lift session.....

 

[Rade]

I am pleased with the upgrade! I have been using the DCFC, and plug in somewhere in the 30-40% range. Prior, it was a 45-50 minute session. Hit it the other morning and went from 38% to 85% in 35 minutes! Not even enough time to finish my Dunkin!

 

[RoRoTheRivian]

To clarify, this is the LFP battery? I didn't know they could reach 221 kw. I've yet to see that and remember reading it was maxed out lower than the non-LFP. Did you used to get 221 before? Or is it part of the update?

 

[LukeNowland]

To clarify, this is the LFP battery? I didn't know they could reach 221 kw. I've yet to see that and remember reading it was maxed out lower than the non-LFP. Did you used to get 221 before? Or is it part of the update?

I noticed this too, however after some research, I think this is normal and its just extra kilowatts going into battery temp management and computers, not directly into the battery. Someone is more than welcome to correct me if I'm wrong.

 

[Riviot]

I'm sure you're not getting behind the wheel after that 3 Margarita lift session.....

Definitely not. My wife drives after dark, which is usually when I start drinking, so I don't know if the starbursts are from my eyeballs or the tequila.

 

[Oldsmobile_Mike]

Just curious since I didn't see it mentioned - was this at a Rivian charger, Tesla charger, or somewhere else?

 

[LukeNowland]

Just curious since I didn't see it mentioned - was this at a Rivian charger, Tesla charger, or somewhere else?

Electrify America

 

[Budman]

See my testing of a Gen 2 Max Pack with latest update here;

https://www.rivianforums.com/forum/...ing-with-2025-18-01-update.46384/#post-808683

Electrify America station.

 

[C12farmer]

I noticed this too, however after some research, I think this is normal and its just extra kilowatts going into battery temp management and computers, not directly into the battery. Someone is more than welcome to correct me if I'm wrong.

212kW is about the max that can go into the pack. I think 221kW is the output from the charger. There are losses and other consumption by the car.

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