E110
Enphase
Pilot Duty Cycle / Current Limit Encoding Error
Charger displays E110; app may show 'CP duty cycle error' or 'Invalid current request'.
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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
Faulty PWM generation on control board, Noise or distortion on pilot line, Incorrect configuration of maximum current in Enphase app, Vehicle requesting unsupported current level
How to Fix / Troubleshooting
Safety: This is typically a control/communication issue rather than a shock hazard, but always follow standard precautions.
- Check app settings: Open the Enphase app and verify the maximum charging current is set within the charger and circuit rating. Avoid setting values higher than the breaker rating.
- Power cycle: Turn OFF the breaker for 2 minutes, then ON. This resets the PWM generator on the control board.
- Try another vehicle (if available): If E110 only occurs with one vehicle, the vehicle's onboard charger may be misinterpreting the pilot signal. Check for vehicle firmware updates.
- Inspect cable for interference: Avoid running the EV cable parallel and tightly bundled with high-current conductors or large motors that can induce noise.
- If persistent: The control board's pilot PWM circuit may be defective. A technician can scope the pilot signal and replace the board if needed.
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Repair Difficulty
Hard
4/5
Required Part
Enphase EV Charger Control Board (Pilot PWM Circuit)
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