Enphase Microinverter Error Codes

Resolution text is manufacturer/service context, not permission for an owner to perform electrical work. Stop at visible observations unless the exact product instructions identify an owner control. Isolation, configuration, testing, opening equipment and wiring are for an appropriately licensed worker and, where required, an SAA-accredited person. Where a card says Product fit is unknown, treat it as brand-level guidance and confirm the exact model, role, regional variant, firmware and current manual before acting.

• AC Voltage Out Of Range

  Grid voltage too high or too low

  The microinverter is measuring AC (grid) voltage outside the limits set by its grid profile, so it disconnects and stops exporting until the grid settles back within range. In Australia high readings are extremely common on long suburban streets at midday when lots of solar is exporting and pushing local voltage up.

  Product fit · Unknown

  Show field stepsHide field steps for AC Voltage Out Of Range: Grid voltage too high or too low

  Product fit · Unknown

  Safe checks now

  No action is needed — the manual states this condition corrects itself once utility voltage returns within limits for several minutes, with the wait restarting if voltage strays again. Record how often it appears and contact the installer if it persists or recurs daily.

  Installer remedy

  For persistent events the manual's escalation is to the installer or Enphase's troubleshooting guide. Beyond that, verify the measured supply against the configured grid profile and raise sustained out-of-range voltage with the network operator. The region-set reconnection delay is documented behaviour, not a fault.

  Remedy sourceEnvoy gateway manual

  Manufacturer / escalation handoff
• AC Frequency Out Of Range

  Grid frequency too high or too low

  The microinverter is measuring a grid frequency outside its safe operating band (nominal 50 Hz in Australia) and goes offline as required by grid-protection rules. It must stay off until the grid has been continuously within limits for a set period; if frequency strays again during that window, the timer restarts.

  Product fit · Unknown

  Show field stepsHide field steps for AC Frequency Out Of Range: Grid frequency too high or too low

  Product fit · Unknown

  Safe checks now

  No action is needed — the manual describes these events as usually transient and self-correcting by the electricity network, with the microinverter staying offline until frequency has been in range continuously for a region-set period. Contact the installer if it persists.

  Installer remedy

  For persistent events the manual's escalation is to the installer or Enphase's troubleshooting guide. Beyond that, verify the supply frequency and the configured profile, and raise a sustained network frequency issue through the network process. The restarting reconnection timer is documented behaviour.

  Remedy sourceEnvoy gateway manual

  Manufacturer / escalation handoff
• Grid Gone

  No grid / AC supply detected

  The microinverter has disconnected from the grid/mains because it cannot detect a valid supply, so it shuts down. Enphase units are anti-islanding by design and will not produce power without a stable grid present. This appears during a blackout, or when an AC isolator, breaker or RCD on the solar circuit has been switched off.

  Product fit · Unknown

  Show field stepsHide field steps for Grid Gone: No grid / AC supply detected

  Product fit · Unknown

  Safe checks now

  In most cases no action is required — the manual attributes this to a power outage, with production resuming when supply returns. Check only whether the PV circuit breakers are visibly ON without operating them; contact the installer if events persist.

  Installer remedy

  Verify the AC supply and breaker state. The manual notes persistent events can be a false positive where a microinverter incorrectly reports grid instability, which a microinverter software upgrade may resolve — follow that path before replacing hardware.

  Remedy sourceEnvoy gateway manual

  Manufacturer / escalation handoff
• DC Voltage Too Low

  Not enough DC input from the panel

  The microinverter reports that DC input voltage from its solar module is too low. The manual calls this usually normal during hours of low light and at dawn and dusk; if it does not clear during full daylight, the modules may be heavily shaded or covered by snow.

  Product fit · Unknown

  Show field stepsHide field steps for DC Voltage Too Low: Not enough DC input from the panel

  Product fit · Unknown

  Safe checks now

  The manual calls this usually normal during low light and at dawn and dusk. If it does not clear during full daylight, the modules may be heavily shaded or snow-covered — note the pattern and contact the installer; do not go onto the roof.

  Installer remedy

  For an event that occurs and clears daily in full daylight, the manual's check is module-to-microinverter compatibility. Verify the module's voltage output suits the microinverter before investigating further.

  Remedy sourceEnvoy gateway manual

  Manufacturer / escalation handoff
• DC Power Too Low

  Panel producing too little power

  Closely related to DC Voltage Too Low. The microinverter is measuring DC power below its operating threshold. Most often this is just low light (dawn, dusk, shade, cloud). If it occurs in full sun, it can point to a shaded, soiled or underperforming panel, or a degraded DC connection.

  Product fit · Unknown

  Show field stepsHide field steps for DC Power Too Low: Panel producing too little power

  Product fit · Unknown

  Safe checks now

  No action is needed — the manual attributes this to sunrise, sunset, snow cover or very bad weather, with production resuming once sunlight increases. Contact the installer if it persists in good daylight.

  Installer remedy

  If the event persists during full daylight, inspect the affected module for shading or soiling and confirm the microinverter's reporting. Escalate through Enphase support if generation does not resume in normal conditions.

  Remedy sourceEnvoy gateway manual

  Manufacturer / escalation handoff
• DC Voltage Too High

  Too much DC input from the panel

  The microinverter reports that DC input voltage from the PV module is too high. The manual's recommended action is a module-to-microinverter compatibility check — the module may generate a higher voltage than is recommended for the microinverter.

  Product fit · Unknown

  Show field stepsHide field steps for DC Voltage Too High: Too much DC input from the panel

  Product fit · Unknown

  Safe checks now

  Record which panel reports the event and leave the array and wiring alone. The manual's recommended action is an installer check, so contact yours; do not operate DC equipment or go onto the roof.

  Installer remedy

  The manual's action for this event is checking that the PV module and microinverter are compatible — the module may generate a higher voltage than is recommended for the microinverter. If they are compatible and the condition persists, escalate through Enphase support.

  Remedy sourceEnvoy gateway manual

  Manufacturer / escalation handoff
• GFI Tripped

  Ground-fault current detected

  Legacy hardware only: the cited manual states this condition occurs only with the M190, D380, M210, M200, M175 microinverters and one model of the M215 (M215-60-2LL-S22) — all pre-IQ. On current IQ8 hardware the same insulation-resistance protection is reported under a different name, DC Resistance Low – Power Off. The microinverter's built-in ground-fault (GFI) sensor has detected leakage current to earth during normal operation and has opened the circuit to protect against a fault. It can be triggered by moisture/weather, but a persistent trip points to damaged module insulation (such as cracked module glass), a damaged connector or cable, or water ingress.

  Product fit · Unknown

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  Product fit · Unknown

  Safe checks now

  This condition is documented for pre-IQ hardware only, shown by a solid red status LED. Record which unit reports it and stay off the roof; a repeating trip is an earth-fault symptom for a licensed electrician, not something to reset and forget.

  Installer remedy

  The Envoy-S manual's procedure is sending the clear-gfi message through the Envoy after the cause is addressed — a persistent or recurring trip means inspecting module insulation, cabling and connectors first, and contacting Enphase support if it will not clear. On IQ8 hardware the equivalent condition is DC Resistance Low – Power Off.

  Remedy sourceEnvoy-S manual

  Manufacturer / escalation handoff
• DC Resistance Low - Power Off

  Insulation resistance to earth too low

  An insulation-resistance (IR) sensor in the microinverter measures the resistance to earth from the positive and negative DC inputs. If it drops below the acceptable threshold (around 7 kΩ on IQ units), the unit stops producing and latches off. On IQ8 units this shows as a solid red status LED (after DC power has been cycled), and the gateway keeps reporting the fault until it is cleared. Common causes are moisture ingress, damaged cabling/connectors, or degraded module insulation.

  Product fit · Family-level · IQ8 Series

  Show field stepsHide field steps for DC Resistance Low - Power Off: Insulation resistance to earth too low

  Product fit

  • IQ8 Series · Role not confirmed

    Family-level · Manual IOM-00068-3.0-EN · AU/region not confirmed · Firmware not documented

  Safe checks now

  Record the event, affected panel and weather conditions. Do not go onto the roof, reset the device or touch array wiring; contact the installer because the IQ8 remains power-off for this condition.

  Installer remedy

  Use the IQ8 manual's DC-resistance troubleshooting path to inspect the affected module and DC connection under safe isolation. Rectify the insulation condition before clearing the event or returning the unit to service.

  Remedy sourceIQ8 manual

  Manufacturer / escalation handoff
• Over Temperature / Critical Temperature

  Microinverter running too hot

  An internal temperature measurement inside the microinverter is above its normal range. To protect itself it automatically reduces (derates) its power output, and in extreme cases shuts down, until it cools; full power resumes once the temperature falls to an acceptable level. Note this is an internal reading, not ambient air temperature (IQ8 units run at full power up to about 50 °C ambient and derate above that). It can be driven by very high roof temperatures or restricted airflow behind the panel.

  Product fit · Unknown

  Show field stepsHide field steps for Over Temperature / Critical Temperature: Microinverter running too hot

  Product fit · Unknown

  Safe checks now

  No action is needed — the manual describes both events as self-correcting: the microinverter derates or stops producing until its internal temperature returns to normal limits, then resumes full production. Contact the installer if it persists.

  Installer remedy

  If the condition persists, the manual's path is Enphase customer support. Confirm the install conditions have not changed before escalating; the reading is the unit's internal sensor, not ambient temperature.

  Remedy sourceEnvoy gateway manual

  Manufacturer / escalation handoff
• Microinverter Failed to Report

  Gateway has lost contact with a microinverter

  The IQ Gateway is no longer receiving data from one or more microinverters over the powerline communication (PLC) link, so the panel shows grey (not reporting). It can be caused by powerline-communication interference (e.g. a surge strip, noise source, or the gateway being plugged into a power board rather than a wall outlet), a tripped solar breaker/isolator, an AC wiring issue, or a failed unit. It does not necessarily mean the panel has stopped producing.

  Product fit · Unknown

  Show field stepsHide field steps for Microinverter Failed to Report: Gateway has lost contact with a microinverter

  Product fit · Unknown

  Safe checks now

  Check the affected panel's last-report time in the Enphase app and wait for a short-lived communication interruption to clear. If it remains beyond 24 hours, contact the installer; do not operate solar breakers.

  Installer remedy

  Follow Enphase's microinverter-not-reporting workflow, separating power-line communication interference from AC, wiring or device faults. Document the result before replacement or warranty escalation.

  Remedy sourceCurrent troubleshooting

  Manufacturer / escalation handoff
• Microinverter Not Detected / Not Found

  New microinverter not discovered during commissioning

  During or after installation the IQ Gateway / Enphase Installer App cannot find a microinverter to add it to the system. This is a commissioning-stage condition (the device shows as "not discovered") rather than a logged operational fault, and usually means the unit isn't yet powered, hasn't been given time to be discovered, or its serial wasn't scanned correctly.

• Device Produced No Power

  No energy generated in the last 24 hours

  A microinverter that previously produced has generated no power within the last 24 hours. Causes range across the grid (a profile/voltage/frequency condition keeping it off), the AC side (a tripped breaker or isolator), or a failed unit.

• Gateway / Envoy Not Reporting

  IQ Gateway not sending data to Enphase

  The IQ Gateway (Envoy) itself has stopped uploading data to the Enphase cloud, so the whole system appears offline in the app. This is almost always an internet/connectivity problem (router, Wi-Fi, or the gateway's own connection) rather than a solar production fault. Your panels may still be generating normally.

  Product fit · Unknown

  Show field stepsHide field steps for Gateway / Envoy Not Reporting: IQ Gateway not sending data to Enphase

  Product fit · Unknown

  Safe checks now

  Confirm the home internet is working and follow the Gateway Not Reporting steps presented in the Enphase app. This monitoring fault does not by itself prove that solar production has stopped.

  Installer remedy

  Confirm gateway power and its Wi-Fi or Ethernet path, then use the current Enphase gateway reconnection workflow. Escalate if the gateway remains offline after the documented connectivity checks.

  Remedy sourceCurrent troubleshooting

  Manufacturer / escalation handoff