BYD
Nuisance Tripping / High Inrush or Leakage
Charger trips the household RCD or breaker as soon as a charging session starts, but no error code is displayed on the charger.
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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.
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Possible Causes
Type A RCD used instead of Type A EV or Type B as required, High inrush current from BYD power module, Cumulative leakage from multiple circuits, Faulty internal filter capacitors
How to Fix / Troubleshooting
Safety first: Frequent tripping indicates a protection device is responding; do not bypass it.
- Check RCD type: Have an electrician verify that the RCD protecting the BYD charger matches BYD’s specification (often Type A EV or Type B).
- Dedicated circuit: Ensure the charger is on its own dedicated circuit, not shared with other large loads.
- Stagger loads: Avoid starting other heavy appliances at the same time as EV charging.
- Insulation and leakage tests: An electrician should perform tests on the charger and circuit to measure leakage current.
- Replace incompatible RCD or faulty charger components: Upgrade the RCD if needed, or service the charger if internal leakage is excessive.
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Repair Difficulty
Hard
4/5
Required Part
Upstream RCD (Type A EV / Type B)
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