Bosch
GFCI Coordination / Leakage Current Nuisance Trip
Bosch EV charger frequently causes nuisance trips of an upstream GFCI breaker or receptacle, even though no visible faults are present.
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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
Charger’s internal leakage close to GFCI threshold, Shared circuits with other loads, Incompatible upstream GFCI device, Long cable runs increasing leakage
How to Fix / Troubleshooting
Safety first: Do not defeat or bypass ground-fault protection without consulting an electrician.
- Dedicated circuit: Ensure the Bosch charger is on a dedicated circuit as required by Bosch and electrical code.
- Use correct breaker type: Many EVSEs require a standard breaker because they have built-in ground-fault protection. Check Bosch documentation and have an electrician install the recommended breaker type.
- Inspect wiring: Verify there are no shared neutrals or multi-wire branch circuits feeding the charger.
- Professional evaluation: If nuisance trips persist with correct breaker type and wiring, a technician should measure leakage current and inspect the internal ground-fault circuitry.
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Repair Difficulty
Medium
3/5
Required Part
Ground Fault Detection Module / Upstream Breaker
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