Calibrating the Battery Management System (CAC REBALANCE)

Your Tesla's Battery Management System (BMS) calculates your range, battery level and capacity.

Over time, these calculations may become inaccurate because:

1. The calibration accuracy has drifted over time.
2. The battery has become imbalanced due to the shifting of individual battery cell voltages.

You can recalibrate the BMS accuracy and rebalance the battery cells by doing the following:

1. Let the battery fall below 10%.
2. Leave it there for at least an hour.
3. Charge the battery to 100% and keep charging until the vehicle is no longer adding any energy from the charger. This may take an hour or longer after reaching 100%.

After this process is finished, the BMS measurements will be more accurate. As a result, the measured capacity and range may change.