BMS family
BMS_a023_SW_Stack_OV
Unable to charge
What does the BMS_a023_SW_Stack_OV alert mean?
The battery management system (BMS) has detected that the voltage of one or more of the stacks in the high voltage (HV) battery is too high.
What you'll see in your Tesla
- Unable to charge
- Service is required
What triggers it
The BMS detects that the voltage of a stack is above the maximum threshold.
When it clears
The BMS detects that the voltage of all stacks is within the threshold.
Potential impact
Inability to charge
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.