The Complete Guide To Sigenergy SigenStor Error Codes

The energy controller cannot see mains power on its grid side. Usually the power is out or the solar supply main switch or breaker in the switchboard is off; a system with backup keeps running the house from the battery. It reconnects by itself once the grid is back. If it stays while the neighbours have power, the switchboard and AC connections need checking.

The mains voltage at the energy controller rose above the limit it is allowed to export at (the app shows Level I, II or III for how far over), so it disconnected. It reconnects by itself once the grid settles. If it happens most sunny afternoons the street voltage is high and Sigenergy's advice is to measure it and contact the network. The gateway logs the same per phase as 3009.

The mains voltage at the energy controller dropped below the limit, often a brownout, a heavy load starting nearby or a loose AC connection, and it disconnected. It reconnects by itself once the voltage recovers. On a three-phase system a missing phase shows as 3008 Grid phase loss and needs the grid-side wiring checked.

The grid frequency went above (1013) or below (1014) the energy controller's limits for a moment, or changed too fast (1027 Grid frequency unstable), and it disconnected. It reconnects by itself once the grid is steady. If it happens often, Sigenergy's advice is to measure the frequency and contact the network.

On a three-phase system the three phases differ too much in voltage or timing, so the energy controller disconnected. It reconnects by itself once the grid settles. If it keeps happening, Sigenergy's advice is to measure each phase and contact the network, since the cause is on the supply side.

On a three-phase system the phases are connected in the wrong order at the energy controller (1024), at the gateway's grid input (3006), load side (3007) or generator input (3012). The system will not run until two phases are swapped, which is an installer job. It only appears at commissioning or after switchboard work.

The open-circuit voltage of a solar string is above the energy controller's maximum input, which Sigenergy puts down to too many panels in series. It shows on cold, clear mornings. The controller protects itself and waits for the voltage to drop; the lasting fix is fewer panels in that string, which is an installer job. The app's ID number says which string. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

A solar string is connected with positive and negative the wrong way round. The energy controller will not use that string until the wiring is corrected. It normally shows at commissioning or after work on the roof, and the fix is on the DC side, which is an installer job done with the DC isolator open once the string current is low.

One string is pulling current instead of producing it, which happens when it is weaker than the strings it shares an input with: fewer panels, heavy shading, dirt, or a different orientation. Sigenergy's fix is to match the panel count, clear the shading or clean the panels, which may need the installer to rework the string.

While running the house without the grid, the backup output went out of range: too much load (ID1), a short on the backup wiring (ID2), or voltage or frequency off because of a very large load, a generator, or the gateway's inverter-side switch being off (IDs 3 to 6). Switch off heavy appliances and it recovers; a short or a repeat needs an electrician. The gateway logs load-side faults as 3011. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The energy controller found too little insulation between the solar wiring and earth: Sigenergy's causes are a PV string shorted to earth or installed somewhere permanently damp, so water in a connector, a chafed cable or a damaged panel. An alarm only on rainy mornings is usually moisture; one that stays is a safety issue and needs an electrician. The EV charger raises the same fault as 5102.

The system cannot see a good earth (protective earth) connection. Sigenergy's cause is simply that the PE cable is not connected or not earthed; the gateway's version (3005) adds a high voltage between neutral and earth or live and neutral swapped. The system will not run safely without an earth, so it is an electrician's check.

The energy controller's arc detector heard the electrical signature of a DC arc on a solar string, which is a fire risk. It shuts the solar input down. Sigenergy's causes are a damaged DC cable or a poor connection at a string connector; after repair the fault is cleared in the mySigen app. Treat it as urgent and do not keep clearing it.

The energy controller measured current leaking to earth above its protection threshold, usually damaged cable insulation, water in a connector or high humidity on the solar side. Sigenergy says a one-off clears itself, but because this is an electrical safety trip a repeat needs an electrician. The gateway's version (3004) points at a load with damaged insulation while running on backup.

The circuit that listens for DC arcs failed its own self-test, as opposed to finding an arc. The energy controller will not run its solar input without a working arc detector. Sigenergy's step is to clear the self-test fault in the app and restart; if it comes back, the detection board needs a service call.

The energy controller sees one of the grid phases shorted to earth on the AC wiring. It will not connect until the wiring is checked, which is an electrician's job and should not be reset by the owner.

The energy controller (1003) or the gateway (3002) got too hot, usually a hot afternoon in direct sun or poor airflow where it is mounted, and it cut back or paused. Sigenergy says it restarts by itself once the inside cools. If it happens often or in mild weather, the location, ventilation or a fan needs checking. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The built-in EV charger stopped for a protection reason: grid voltage out of range, overload, a short, leakage current or a ground or wiring fault (5001, the ID says which), the charger or plug too hot (5003), a cable it does not recognise (5004) or a handshake problem with the car (5105). First steps: stop, unplug, let it cool, try again; leakage, ground and wiring faults need an electrician. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

A module inside the energy controller has failed its check: the power module, control module, auxiliary power supply, PID module, monitoring module, heating film or the external fan (IDs 1 to 7). Sigenergy allows one full power-down and restart; if the alarm comes back a part inside needs replacing, which Sigenergy handles through its service partner.

The energy controller measured a small DC component in its AC output, which the grid rules do not allow, and disconnected. Sigenergy says a one-off comes from a sudden change in conditions and clears by itself. If it happens often or stays, the output stage needs a service check. DC on the AC side is a protection fault, so we treat it as a call.

One of the energy controller's internal limits tripped: an MPPT or output overcurrent, the DC bus over its voltage or out of balance, or the internal control protection (the app's ID says which). The battery (2008) and EV charger (5106) have the same family. Sigenergy says a one-off clears by itself; if it happens often or stays, the unit needs a service check.

The energy controller found a problem with its AC wiring: the connections at the AC port are wrong or loose (newer firmware may name a disconnected neutral), or the gateway's internal switch is off. It normally appears at commissioning or after switchboard work. Sigenergy's steps are standby, isolate the grid switch, wait for power-off and check the wiring, which is an installer job.

The energy controller tried to ramp up and connect but did not complete its soft start. Sigenergy says a one-off comes from a sudden change in conditions and the unit tries again by itself; if it happens often or it never connects, it needs a service check.

The Sigen Energy Gateway (the box that switches the house between grid and backup) has reported a fault in its own hardware: its auxiliary power, internal communication, control circuit, or the grid, generator or neutral-earth contactor stuck open or closed (IDs 1 to 9). The house may lose its backup switching. Sigenergy allows one full power-down and restart; a repeat needs a service call.

The built-in EV charger has reported a fault in its own hardware: its leakage detection circuit, relay, control circuit, auxiliary power, the plug's electronic lock or its indicator board (5002), or on the DC charger its fan, power or insulation-detection circuit (5104). Sigenergy allows one restart of the charger; if the alarm comes back it is a service call. The solar and battery keep working.

The Sigen Energy Gateway measured the grid (3009) or a connected generator (3010) outside its voltage or frequency limits on one or more phases. Sigenergy says to wait for the grid to return to normal and the alarm clears itself; if the grid is fine and it stays, the grid or generator wiring at the gateway needs checking.

A battery module measured too little insulation between itself and its housing, which Sigenergy puts down to the module being shorted to the case: water, damage or an internal fault. Sigenergy allows one full power-down and restart from the app; if the alarm returns the module needs a service call. Do not keep restarting it.

A battery module, or the power stage that charges it, got too hot and the system paused charging or discharging. It resumes once it cools. A hot afternoon in direct sun or poor airflow is the usual cause; if it happens often or in mild weather, the location or the module needs checking. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

A battery module has reported a fault in its own hardware: its control circuit, the battery module itself, its auxiliary power supply, the link between modules, or a stuck switch button (IDs 1 to 5). Sigenergy allows one full power-down and restart from the app; if the alarm comes back the module needs replacing through Sigenergy's service partner.

A battery module is too cold to charge or discharge safely, so it pauses. The SigenStor battery has its own heater: Sigenergy says to wait for the system to warm itself to its working range, after which it recovers by itself. A garage or shaded wall in a frosty area is the usual cause; if it stays after the day warms, the heater or a sensor needs checking.

A battery module, or cells inside it, has been charged above its safe voltage, so the system has stopped charging it. Sigenergy's instruction is to go to the Support troubleshooting page or contact the local service; it is not something to clear yourself, since it points to a balancing or charge-control fault. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

A battery module, or cells inside it, has dropped below its safe voltage, so the system has stopped discharging it. Sigenergy says this follows a long time in storage or switched off, for example after a long blackout or a system left off for weeks. Sigenergy's instruction is to go to the Support troubleshooting page or contact the local service so the battery can be recovered safely.

The software inside the parts of the SigenStor does not match: the energy controller (1001), a battery module (2001), the gateway (3001) or the EV charger (5101) is on a different version from the rest, usually after an interrupted update or a new module. The system may run in a limited way. The fix is another update, which the installer or Sigenergy pushes remotely through mySigen.

Part of the system has stopped talking to the rest: the 4G dongle (ID1, no data or SIM), the internal CAN link (ID2), the energy meter (ID3) or the gateway (ID4); the gateway logs its own view as 4001. Solar and battery usually keep working, but the app may show no data or the battery may not know what the house is using. Sigenergy's steps: check the 4G data and dongle, restart, check the cables. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

Someone pressed the emergency stop (rapid shutdown) button, so the system has shut itself down on purpose; the gateway reports the same as 3013. Nothing is faulty. Once you are sure there is no safety problem on site, release the button (on earlier firmware) or follow the app's prompt and the system restarts.

The gateway's bypass switch, which lets an electrician feed the house straight from the grid during service, is in the wrong state: it will not close (3014) or has been left on (3015), so the system is not controlling the house supply. The house still has grid power. Sigenergy's steps are to check the gateway is working and, if it is, switch the bypass off again; an installer does this.