Fast charging slows down earlier than it used to

I went back under the 2024 Rivian R1S and it only happens after a heat soak, not on a cold start. Checking again after work.

I'd treat 12V warnings as a no-ignore. On the 2024 Rivian R1S, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “fast charging slows down earlier than it,” that was the fork that mattered for me. If it doesn't change the out-the-door or the repair estimate, it's noise. This is the filter I use when the thread starts repeating itself. I already checked the easy fluid levels.

I'd treat 12V warnings as a no-ignore. On the 2024 Rivian R1S, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. That's where I'd start. On “fast charging slows down earlier than it,” that was the fork that mattered for me. Write the result down so the next test isn't a repeat of the last one. This is the filter I use when the thread starts repeating itself. If it repeats twice more I'll book time.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. I'd do that before spending real money. Time, temperature, and whether it's in gear are the notes that actually help a shop. I'm keeping receipts and dates in one folder.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. Then you'll know the next fork. Time, temperature, and whether it's in gear are the notes that actually help a shop. Only after sitting overnight so far.

Don't clear the alert just to make the screen pretty. Leave the alerts on the 2024 Rivian R1S so service can see what you saw. That's where I'd start. Do that first. That's my plan before I call anyone.

Checked the easy stuff on the 2024 Rivian R1S and found one clue worth chasing before I book a shop. I refuse to clear codes until someone else sees them.

It did fast charging slows down earlier than it twice this week, both times after sitting. No change in mileage feel. I keep a notes app thread for this now.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. Then you'll know the next fork. I'd want a dollar figure or a measured spec, not 'should be fine.' I already checked the easy fluid levels.

Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2024 Rivian R1S charge sessions. Then you'll know the next fork. A shop burned me once by skipping that step. A day of patience here is cheaper than a wrong part. Video is ugly but it shows the hesitation.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. I'd do that before spending real money. This is from a 2024 Rivian R1S in New York with 14,500 miles. Time, temperature, and whether it's in gear are the notes that actually help a shop. Worth doing even if the car feels fine right now. I'll update if anything new shows up.