BMS family
BMS_a024_SW_Islanded_Brick
Unable to charge
What does the BMS_a024_SW_Islanded_Brick alert mean?
The battery management system (BMS) has detected that a brick's voltage slope is significantly less than average.
What you'll see in your Tesla
- Unable to charge
- Service is required
What triggers it
The BMS detects that brick voltage is staying constant even while pack current is rising or dropping.
When it clears
The BMS detects that the condition clears.
Potential impact
Inability to charge, power is reduced, and regenerative breaking is reduced
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.