Enphase
Enphase EV Home Chargers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E101
Charger will not start charging; app shows E101 and vehicle does not transition from 'plugged in' to 'charging'.
Pilot Signal Communication Fault
E102
Charger displays E102 and refuses to start; vehicle may briefly show 'charging' then immediately stop.
Proximity Detection / Latch Switch Fault
E103
Charger shows E103 and will not energize; app may indicate 'Ground fault detected'.
Ground Fault Circuit Interruption (GFCI) Trip
E104
Charger displays E104 and refuses to charge; app may show 'Line voltage out of range'.
AC Input Voltage Out of Range
E105
Charger shows E105 and does not start; app may indicate 'Contactor fault' or 'Relay weld detection'.
Main Contactor / Relay Weld Detection Fault
E106
Charger displays E106; app may show 'Overtemperature – charging disabled'.
Internal Overtemperature Protection Trip
E107
Charger shows E107 and will not charge; app may indicate 'Ground impedance too high' or 'No protective earth'.
Protective Earth / Ground Impedance Fault
E108
Charger displays E108; app may show 'Stuck relay' or 'Unexpected voltage at output'.
Output Relay / Contactor Feedback Mismatch
E109
Charger shows E109; app may indicate 'Pilot short to ground' or 'Pilot short to line'.
Pilot Line Short Circuit
E110
Charger displays E110; app may show 'CP duty cycle error' or 'Invalid current request'.
Pilot Duty Cycle / Current Limit Encoding Error
E201
Charger shows E201; app indicates 'Wi-Fi connection failed' or 'Network error – offline'. Charging may still work locally.
Wi-Fi Communication Failure
E202
Charger displays E202; app shows 'Cloud communication error' or 'Cannot reach Enphase servers'.
Cloud Backend Communication Fault
E203
Charger shows E203; app may indicate 'OCPP server error' or 'Backend authentication failed' (for networked/managed installations).
OCPP / Backend Authentication Fault
E204
Charger displays E204; app may show 'Load management error' or 'CT sensor fault' when used with Enphase load control or solar integration.
Current Transformer (CT) / Load Management Sensor Fault
E205
Charger shows E205; app may indicate 'Firmware update failed' or 'Firmware corruption detected'.
Firmware Update / Corrupted Firmware
E301
Charger displays E301; app may show 'Overcurrent detected – charging stopped'.
Output Overcurrent Protection Trip
E302
Charger shows E302; app may indicate 'DC leakage detected'.
DC Residual Current Detection Fault
E303
Charger displays E303; app may show 'Phase imbalance' or 'Line current mismatch' (for three-phase capable models).
Phase Current Imbalance Fault
E304
Charger shows E304; app may indicate 'Internal communication error' between control and power modules.
Internal CAN / Serial Bus Communication Fault
E305
Charger displays E305; app may show 'RTC error' or 'Clock synchronization failed'.
Real-Time Clock / Timekeeping Fault
E401
Charger shows E401; app may indicate 'Authentication failed – RFID card not recognized' (for RFID-enabled models).
User Authentication / RFID Fault
E402
Charger displays E402; app may show 'Overvoltage surge detected – surge protection active'.
Surge Protection / MOV Clamp Event
Symptom
Charger causes GFCI or RCD breaker to trip, but the charger itself shows no error.
Upstream Ground Fault Protection Trip
Symptom
Charger completely dead – no LEDs, no display, and not visible in the Enphase app.
No Power / Dead Unit
Symptom
Charger display or status LEDs are dim, flickering, or unreadable, but charging still works.
User Interface / LED Driver Degradation
Symptom
Charger enclosure vibrates noticeably or rattles when vehicle is charging at high current.
Mechanical Vibration / Loose Mounting
Symptom
Charger frequently disconnects from Wi-Fi or drops offline in the app, but local charging continues.
Intermittent Network Connectivity
Symptom
Charger intermittently locks up – LEDs frozen, no response to button presses, must be power-cycled to recover.
Control Board Firmware Lockup
Symptom
Charger makes loud clicking, buzzing, or humming noises during operation.
Noisy Contactor or Power Electronics
Symptom
Charger or cable becomes excessively hot to the touch during normal charging, even though charging completes.
Overheating Connector or Cable
Symptom
Charger powers on but vehicle will not charge; no error code shown on charger or app, vehicle just reports 'charging stopped' or 'not charging'.
General EVSE–Vehicle Handshake Failure
Symptom
Charger starts charging but stops after a few minutes without any error code; user must unplug and replug to resume.
Intermittent Thermal or Current Limiting Shutdown
Symptom
Charger trips the house breaker immediately or shortly after starting a charge.
Circuit Breaker Nuisance Trip or Short Circuit
Symptom
Enphase app shows incorrect energy usage or charging session data compared to vehicle or utility meter.
Metering / Energy Measurement Inaccuracy
Symptom
Scheduled charging does not start at the programmed time, even though the charger and app are online.
Scheduling / Timer Function Fault
Symptom
Unusual burning, plastic, or electrical smell near the charger during or after charging.
Overheating Component / Insulation Breakdown
Symptom
Water or condensation visible on or inside the charger enclosure; intermittent charging issues in wet weather.
Moisture Ingress / Compromised Enclosure Seal
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E101 |
Charger will not start charging; app shows E101 and vehicle does not transition from 'plugged in' to 'charging'.
|
Pilot Signal Communication Fault | View Details |
| E102 |
Charger displays E102 and refuses to start; vehicle may briefly show 'charging' then immediately stop.
|
Proximity Detection / Latch Switch Fault | View Details |
| E103 |
Charger shows E103 and will not energize; app may indicate 'Ground fault detected'.
|
Ground Fault Circuit Interruption (GFCI) Trip | View Details |
| E104 |
Charger displays E104 and refuses to charge; app may show 'Line voltage out of range'.
|
AC Input Voltage Out of Range | View Details |
| E105 |
Charger shows E105 and does not start; app may indicate 'Contactor fault' or 'Relay weld detection'.
|
Main Contactor / Relay Weld Detection Fault | View Details |
| E106 |
Charger displays E106; app may show 'Overtemperature – charging disabled'.
|
Internal Overtemperature Protection Trip | View Details |
| E107 |
Charger shows E107 and will not charge; app may indicate 'Ground impedance too high' or 'No protective earth'.
|
Protective Earth / Ground Impedance Fault | View Details |
| E108 |
Charger displays E108; app may show 'Stuck relay' or 'Unexpected voltage at output'.
|
Output Relay / Contactor Feedback Mismatch | View Details |
| E109 |
Charger shows E109; app may indicate 'Pilot short to ground' or 'Pilot short to line'.
|
Pilot Line Short Circuit | View Details |
| E110 |
Charger displays E110; app may show 'CP duty cycle error' or 'Invalid current request'.
|
Pilot Duty Cycle / Current Limit Encoding Error | View Details |
| E201 |
Charger shows E201; app indicates 'Wi-Fi connection failed' or 'Network error – offline'. Charging may still work locally.
|
Wi-Fi Communication Failure | View Details |
| E202 |
Charger displays E202; app shows 'Cloud communication error' or 'Cannot reach Enphase servers'.
|
Cloud Backend Communication Fault | View Details |
| E203 |
Charger shows E203; app may indicate 'OCPP server error' or 'Backend authentication failed' (for networked/managed installations).
|
OCPP / Backend Authentication Fault | View Details |
| E204 |
Charger displays E204; app may show 'Load management error' or 'CT sensor fault' when used with Enphase load control or solar integration.
|
Current Transformer (CT) / Load Management Sensor Fault | View Details |
| E205 |
Charger shows E205; app may indicate 'Firmware update failed' or 'Firmware corruption detected'.
|
Firmware Update / Corrupted Firmware | View Details |
| E301 |
Charger displays E301; app may show 'Overcurrent detected – charging stopped'.
|
Output Overcurrent Protection Trip | View Details |
| E302 |
Charger shows E302; app may indicate 'DC leakage detected'.
|
DC Residual Current Detection Fault | View Details |
| E303 |
Charger displays E303; app may show 'Phase imbalance' or 'Line current mismatch' (for three-phase capable models).
|
Phase Current Imbalance Fault | View Details |
| E304 |
Charger shows E304; app may indicate 'Internal communication error' between control and power modules.
|
Internal CAN / Serial Bus Communication Fault | View Details |
| E305 |
Charger displays E305; app may show 'RTC error' or 'Clock synchronization failed'.
|
Real-Time Clock / Timekeeping Fault | View Details |
| E401 |
Charger shows E401; app may indicate 'Authentication failed – RFID card not recognized' (for RFID-enabled models).
|
User Authentication / RFID Fault | View Details |
| E402 |
Charger displays E402; app may show 'Overvoltage surge detected – surge protection active'.
|
Surge Protection / MOV Clamp Event | View Details |
| – |
Charger causes GFCI or RCD breaker to trip, but the charger itself shows no error.
|
Upstream Ground Fault Protection Trip | View Details |
| – |
Charger completely dead – no LEDs, no display, and not visible in the Enphase app.
|
No Power / Dead Unit | View Details |
| – |
Charger display or status LEDs are dim, flickering, or unreadable, but charging still works.
|
User Interface / LED Driver Degradation | View Details |
| – |
Charger enclosure vibrates noticeably or rattles when vehicle is charging at high current.
|
Mechanical Vibration / Loose Mounting | View Details |
| – |
Charger frequently disconnects from Wi-Fi or drops offline in the app, but local charging continues.
|
Intermittent Network Connectivity | View Details |
| – |
Charger intermittently locks up – LEDs frozen, no response to button presses, must be power-cycled to recover.
|
Control Board Firmware Lockup | View Details |
| – |
Charger makes loud clicking, buzzing, or humming noises during operation.
|
Noisy Contactor or Power Electronics | View Details |
| – |
Charger or cable becomes excessively hot to the touch during normal charging, even though charging completes.
|
Overheating Connector or Cable | View Details |
| – |
Charger powers on but vehicle will not charge; no error code shown on charger or app, vehicle just reports 'charging stopped' or 'not charging'.
|
General EVSE–Vehicle Handshake Failure | View Details |
| – |
Charger starts charging but stops after a few minutes without any error code; user must unplug and replug to resume.
|
Intermittent Thermal or Current Limiting Shutdown | View Details |
| – |
Charger trips the house breaker immediately or shortly after starting a charge.
|
Circuit Breaker Nuisance Trip or Short Circuit | View Details |
| – |
Enphase app shows incorrect energy usage or charging session data compared to vehicle or utility meter.
|
Metering / Energy Measurement Inaccuracy | View Details |
| – |
Scheduled charging does not start at the programmed time, even though the charger and app are online.
|
Scheduling / Timer Function Fault | View Details |
| – |
Unusual burning, plastic, or electrical smell near the charger during or after charging.
|
Overheating Component / Insulation Breakdown | View Details |
| – |
Water or condensation visible on or inside the charger enclosure; intermittent charging issues in wet weather.
|
Moisture Ingress / Compromised Enclosure Seal | View Details |
No matching codes found
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