Sigenergy SigenStor Fault 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.

• 1002

  Low insulation resistance (ISO fault)

  The inverter has measured low insulation resistance on the PV (DC) side, meaning the system is detecting a possible leakage path to earth. Common triggers are moisture ingress in a connector or cable, a damaged DC cable, or a string partially shorting to the protective earth (PE). It often appears in the early morning when humidity is highest and may self-clear as things dry out.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1002: Low insulation resistance (ISO fault)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

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  Safe checks now

  Record the alarm, sub-ID, time and weather conditions. Keep clear of PV wiring and do not operate isolators; contact your installer if the low-insulation alarm persists or repeats.

  Installer remedy

  Under the approved safe-isolation procedure, check the identified DC cable for short circuit, damage and positive- or negative-to-earth faults. Verify the ISO threshold against local requirements and submit app feedback if the alarm remains.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1003

  Inverter over-temperature

  The inverter has exceeded its safe internal operating temperature and has throttled or shut down to protect itself. Usual causes are high ambient temperature, the unit sitting in direct sun, or restricted airflow/poor ventilation around the tower.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1003: Inverter over-temperature

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

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  Safe checks now

  From a safe position, check that external ventilation is not visibly obstructed and note whether the unit is in direct sun. Allow it to cool; do not open the enclosure and contact your installer if it persists.

  Installer remedy

  Check ventilation and direct-sun exposure against the installation requirements. The unit should restart after temperature returns to normal; submit app feedback if the alarm remains under compliant conditions.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1006

  String input overvoltage (PV)

  The DC voltage from a PV string (the sub-ID identifies which string: e.g. ID1 = String 1) is above the inverter's maximum allowed input voltage. This almost always means too many panels were wired in series for that string, and the problem shows up worst on cold, bright mornings when panel voltage peaks.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1006: String input overvoltage (PV)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  Leave the SigenStor and PV wiring alone, record the alarm and string sub-ID, and contact your installer promptly. Do not reset the system or operate isolators to test whether it clears.

  Installer remedy

  Under the approved safe-isolation procedure, measure the identified string voltage and compare it with the exact product limit and string design. Reduce the series module count if required before reconnection and submit app feedback if the alarm remains.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1009

  AFCI fault (DC arc detected)

  The arc-fault circuit interrupter has detected what looks like an electrical arc on a PV string (the sub-ID flags which string). This is a genuine fire-safety feature. Arcs are usually caused by a damaged DC cable, a loose or corroded connector, or a poor contact at a string terminal.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1009: AFCI fault (DC arc detected)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

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  Safe checks now

  Treat the arc alarm as urgent: record the string sub-ID, keep clear of the equipment and contact your installer. Do not clear the alarm, operate isolators or touch PV connectors or wiring.

  Installer remedy

  Disconnect the PV DC supply under the approved safe-isolation procedure, then inspect the identified string's cables, connectors and terminations for damage, looseness or burning. Rectify the cause before clearing the alarm in the app; submit support feedback if it remains.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1010

  Grid power outage / grid power failure lock

  The inverter has detected that the grid has gone away, either an actual blackout or the AC isolator/main switch being turned off (ID1). A persistent or repeated loss can put the system into a grid-failure lock state (ID2). With backup configured, the system transfers to battery/backup; otherwise it stops exporting and waits.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1010: Grid power outage / grid power failure lock

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

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  Safe checks now

  Check whether the property and neighbourhood have grid supply, then record the alarm and sub-ID. The system should reconnect automatically; contact your installer if normal supply is present but the alarm remains locked.

  Installer remedy

  Verify reliable grid supply, AC switch and circuit-breaker state, and whether off-grid operation is correctly enabled. Clear the ID2 lock in the app only after the site condition is confirmed safe; submit feedback if it remains.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1011

  Grid overvoltage (Level I / II / III)

  The grid voltage at your connection point has risen above the allowed protection threshold, so the inverter disconnects to protect itself and comply with grid rules. Level I is mildest, Level III most severe. This is one of the most common alarms in Australia, especially around midday in areas with lots of rooftop solar pushing voltage up.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1011: Grid overvoltage (Level I / II / III)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  Record the alarm, sub-ID and time, then wait for automatic recovery when the grid returns to range. Contact your installer if the alarm persists or repeats; do not change protection settings.

  Installer remedy

  Measure the actual grid voltage and compare it with the approved protection settings. Preserve the commissioned profile, contact the grid operator if supply is abnormal and change protection only with operator consent; submit app feedback if the alarm persists.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1012

  Grid undervoltage (Level I / II / III)

  The grid voltage has dropped below the protection threshold, so the inverter disconnects until it recovers. It usually reflects a weak or sagging grid supply rather than an inverter fault, and is more common on long rural feeders or during high-demand periods.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1012: Grid undervoltage (Level I / II / III)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  Record the alarm, sub-ID and time, then wait for automatic recovery when the grid returns to range. Contact your installer if the alarm persists or repeats; do not change protection settings.

  Installer remedy

  Measure the actual grid voltage and compare it with the approved protection settings. Preserve the commissioned profile, contact the grid operator if supply is abnormal and change protection only with operator consent; submit app feedback if the alarm persists.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1013

  Grid overfrequency (Level I / II / III)

  The grid frequency has risen above the allowed threshold and the inverter has disconnected per grid protection rules. This is a grid-side condition, not an internal fault, and usually clears within seconds.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1013: Grid overfrequency (Level I / II / III)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  Record the alarm, sub-ID and time, then wait for automatic recovery when the grid returns to range. Contact your installer if the alarm persists or repeats; do not change protection settings.

  Installer remedy

  Measure the actual grid frequency and compare it with the approved protection settings. Preserve the commissioned profile, contact the grid operator if supply is abnormal and submit app feedback if the alarm persists.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1014

  Grid underfrequency (Level I / II / III)

  The grid frequency has fallen below the allowed threshold and the inverter has disconnected to comply with grid protection requirements. Like overfrequency, it is a grid-side event that normally clears within seconds.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1014: Grid underfrequency (Level I / II / III)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  Record the alarm, sub-ID and time, then wait for automatic recovery when the grid returns to range. Contact your installer if the alarm persists or repeats; do not change protection settings.

  Installer remedy

  Measure the actual grid frequency and compare it with the approved protection settings. Preserve the commissioned profile, contact the grid operator if supply is abnormal and submit app feedback if the alarm persists.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1017

  Leak current out of limit

  The inverter has measured residual/leakage current above its safety threshold. It is often transient, caused by damp conditions or a momentary disturbance, and the system typically recovers once the environment settles.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1017: Leak current out of limit

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

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  Safe checks now

  Record the alarm, sub-ID, time and conditions, then allow the system's automatic recovery. Do not reset or open the unit; contact your installer if the alarm is frequent or prolonged.

  Installer remedy

  Preserve the alarm history and conditions and allow the documented automatic recovery. For a frequent or prolonged leakage-current alarm, submit support feedback and follow only the resulting manufacturer-directed diagnostic path.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1018

  Communication fault (4G / CAN / meter / gateway)

  A communication link inside the system has dropped: for example the 4G/monitoring module (ID1), the battery CAN bus (ID2), the energy meter (ID3), or the gateway (ID4). The sub-ID identifies which link. Monitoring or energy-management features may stop working while it is active even if power flow continues.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1018: Communication fault (4G / CAN / meter / gateway)

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  Record the alarm and sub-ID shown in mySigen, because it identifies the affected 4G, CAN, meter or gateway link. Do not open the enclosure; use app support if the alarm persists.

  Installer remedy

  Match the sub-ID to the affected link: check 4G service and dongle status, use the documented controlled restart for CAN, or inspect the specified meter or gateway communication port. Submit app feedback if communication does not recover.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1022

  EPO / emergency stop activated

  The emergency power-off (EPO) input has been triggered, typically because someone pressed the emergency-stop button (or, on some installs, a shutdown command in the mySigen app). The system stays shut down for safety until the EPO is released.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1022: EPO / emergency stop activated

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  If emergency stop was activated for a hazard, leave the system stopped and keep people clear. After a competent person confirms the site is safe, follow the exact installed emergency-stop control instructions or contact your installer.

  Installer remedy

  Establish why EPO was activated and confirm the site is safe before restoration. Reset only through the documented installed emergency-stop or app control, then submit app feedback if the alarm does not clear.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff
• 1023

  Neutral disconnected / abnormal AC wiring

  The inverter has detected a problem with the AC wiring, most commonly a neutral conductor that is disconnected or has worked loose inside the inverter (ID1), or otherwise abnormal AC wiring (ID2). A poor neutral connection can be a safety hazard.

  Product fit · Family-level · SigenStor

  Show field stepsHide field steps for 1023: Neutral disconnected / abnormal AC wiring

  Product fit

  • SigenStor · Integrated energy-storage system

    Family-level · Manual Version 05 · AU/region not confirmed · Firmware not documented

    Keep family

  Safe checks now

  Do not reset the system, operate electrical switches or touch AC wiring. Record the alarm and sub-ID and arrange attendance by your installer or a licensed electrician.

  Installer remedy

  Place the system in standby or shutdown through the documented app procedure, isolate the grid supply and inspect the neutral connection under safe isolation. Rectify the loose or disconnected neutral, then restore and start the system through the manufacturer sequence.

  Remedy sourceAlarm List v05

  Manufacturer / escalation handoff