Tesla
Reduced Charging Current Configuration or Supply Limitation
Vehicle charges very slowly compared to expected rate, without any explicit error code
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Possible Causes
Wall Connector configured for lower breaker size, Vehicle set to limit current, Undersized or long wiring causing voltage drop, Shared load management limiting current
How to Fix / Troubleshooting
Safety: Slow charging is usually not a safety issue but may indicate configuration problems.
- Check vehicle settings: In the car's charging menu, verify that the current limit is set to the desired value and not reduced for that location.
- Review Wall Connector configuration: Use the commissioning interface to confirm the correct breaker size and maximum current are set.
- Measure voltage under load: An electrician can check for excessive voltage drop during charging, which may require larger conductors or shorter runs.
- Check for load management: If part of a load sharing group or building management system, verify that no unnecessary limits are applied.
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Repair Difficulty
Easy
2/5
Required Part
Tesla Wall Connector configuration and branch circuit conductors
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