Hyundai
Current Derating / Limited Output
Charger output current is lower than expected; vehicle charges very slowly even though settings appear correct.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Charger configured to low maximum current in installer settings, Thermal derating due to high internal temperature, Faulty current sensor misreporting load, Undersized supply circuit causing voltage drop
How to Fix / Troubleshooting
Safety first: Configuration changes can be done with power ON; internal checks require power OFF.
- Check settings: In the Hyundai app or installer menu, verify the maximum current is set to the circuit’s rated value (e.g., 32 A on a 40 A circuit is not allowed; set to 32 A on a 40 A breaker only if permitted by local code).
- Monitor temperature: If the charger is hot, improve ventilation or reduce ambient temperature.
- Measure voltage: A technician should check for excessive voltage drop under load, indicating undersized wiring.
- If configuration and wiring are correct: The current sensor or metering circuit may be faulty and require board replacement.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Current Sensor / Main Control Board
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements