PCS family
PCS_a029_chgPowerRationality
Not Available
What does the PCS_a029_chgPowerRationality alert mean?
Charger is unable to meet BMS's requested power
What you'll see in your Tesla
- Not Available
What triggers it
Charger is unable to meet BMS's requested power within 1kW for more than thirty seconds
When it clears
Charger is able to meet BMS requested power within 1kW for more than one second
Potential impact
Reduced AC charge rate
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.