Tesla BMS_a079 Unable to Charge Above 50% State of Charge

The vehicle has detected an internal high voltage battery condition that specifically limits the battery's ability to charge beyond 50% state of charge. When this condition is present, the vehicle will not initiate charging if the current state of charge is already at or above 50%, serving as a more restrictive state of the general performance limitations associated with BMS_a074.

Sources

• Tesla_Vehicles_Troubleshooting_Alerts — p. 5, 6, 7, 39, 40