E302
Enphase
DC Residual Current Detection Fault
Charger shows E302; app may indicate 'DC leakage detected'.
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
Vehicle injecting DC leakage current, Faulty DC leakage sensor in charger, Moisture or contamination affecting sensor readings, Incorrect grounding or bonding in installation
How to Fix / Troubleshooting
Safety: DC leakage can compromise GFCI operation. Do not ignore this error.
- Try another vehicle: If possible, test charging a different EV. If E302 only occurs with one vehicle, contact the vehicle manufacturer.
- Inspect for moisture: Check around the charger and cable for water ingress. Dry the area thoroughly and wait before retrying.
- Power cycle: Turn OFF the breaker for 5 minutes, then ON, to reset the DC leakage sensor.
- Installation review (electrician): Have an electrician verify proper neutral-ground bonding and that the charger is wired per Enphase instructions.
- If persistent with multiple vehicles and correct wiring: The DC leakage sensor or associated circuitry on the control board is likely defective and must be replaced by a technician.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Enphase EV Charger DC Residual Current Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements