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Reduced Charging Speed on my 2022 R1T - Is this normal or a bug?

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Rachel A. · rep 0 · May 22, 7:23 AM · 1 replies · solved · Question

Vehicle: 2022 Rivian R1T Adventure

Hey everyone, I've been noticing a significant drop in charging speed on my 2022 Rivian R1T Adventure, especially when using my home Level 2 charger and even some public DC fast chargers. It used to charge much quicker.

For example, at home, I'm only getting about 6-7 kW when it should be closer to 11 kW. At a DC fast charger, it's topping out around 80 kW, which feels low for a vehicle capable of much more. I've tried different cables and even different chargers, but the issue persists.

Has anyone else experienced this with their R1T? Could it be a software update issue, or something more serious with the vehicle's charging system? I'm a bit concerned about long-term battery health if this continues. Any advice or shared experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:23 AM

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ClearTheCode admin answer:

Reduced charging speed on your 2022 Rivian R1T can be frustrating and has several potential causes. It's important to diagnose the issue systematically.

  1. Check Software Updates: Ensure your R1T's software is fully up to date. Rivian frequently releases updates that can affect charging performance, sometimes introducing or resolving bugs. A recent update might have changed charging algorithms or introduced a temporary glitch.
  2. Environmental Factors:
    • Temperature: Extremely cold or hot ambient temperatures can significantly impact charging speed. The battery management system will reduce power to protect the battery. Preconditioning the battery before charging (often done automatically when navigating to a charger) can help, but if the system isn't preconditioning effectively, it could be a factor.
    • State of Charge (SoC): Charging speed naturally tapers off as the battery approaches a higher State of Charge (e.g., above 80%). If you're consistently charging from a high SoC, the reduced speed might be normal.
  3. Charging Equipment:
    • Home Charger (Level 2): Verify your home charger (EVSE) is functioning correctly. Check its indicator lights for any fault codes. Ensure your home electrical circuit can consistently deliver the advertised amperage. A faulty breaker or wiring issue could limit power.
    • Public DC Fast Chargers: Different fast chargers have varying maximum outputs. Also, if the charger is shared with other vehicles, its output might be dynamically reduced. Try different public chargers to see if the issue is consistent across multiple stations.
  4. Vehicle Diagnostics:
    • Onboard Charger (OBC): For Level 2 charging, the vehicle's onboard charger converts AC to DC. A fault in the OBC could limit charging speed.
    • Battery Management System (BMS): The BMS controls battery health and charging. A sensor issue or fault within the BMS could incorrectly report battery conditions, leading to reduced charging.
    • Thermal Management System: If the battery or other components are overheating (or the system thinks they are), charging speed will be reduced.
  5. When to See a Shop:
    • If the issue persists across multiple charging locations and types (Level 2 and DC fast charging), and after verifying your software is up to date and environmental factors are not the primary cause, it's time to contact Rivian Service.
    • Describe your observations in detail, including specific kW readings, SoC percentages, and ambient temperatures when the issue occurs. They can run remote diagnostics and check for any internal fault codes (e.g., related to the OBC, BMS, or thermal system) that wouldn't be visible to the user. There might be a Technical Service Bulletin (TSB) for this specific symptom.
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