1018 on a Sigenergy SigenStor: Communication fault. Official suggestion (summarised): ID1 top up 4G/reseat dongle; ID2 restart; ID3/ID4 check comms ports
Short answer
On a Sigenergy inverter, 1018 means: Communication fault. Official suggestion (summarised): ID1 top up 4G/reseat dongle; ID2 restart; ID3/ID4 check comms ports. The inverter keeps running with some functions stopped.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Communication fault. Official suggestion (summarised): ID1 top up 4G/reseat dongle; ID2 restart; ID3/ID4 check comms ports.
Likely causes:
- 4G data exhausted/SIM absent; CAN connector contact; meter or gateway comms connector.
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Warning |
The inverter keeps running with some functions stopped.
Resetting itself: yes.
Manual reset: n/a.
What you can check
- Read the alarm code, name and ID in the mySigen app.
- Report it via mySigen app Support > Troubleshooting (Sigenergy's stated route) or contact your installer.
- For 4G: check the Sigen CommMod data plan in the app.
- Restart via the mySigen app (owner account can issue standby/shutdown then startup).
What the engineer will check
- Reseat 4G dongle; check CAN/meter/gateway comms wiring.
- Sub-IDs: ID1 4G communication; ID2 CAN communication; ID3 meter communication; ID4 Gateway communication.
Who to ask for: battery storage / PV inverter.
Certification: Sigenergy-trained installer; MCS PV/battery installer for certified installs; electrical work to BS 7671.
What you might notice
Sources
- Sigenergy Alarm List (Version 05) ↗ · 05 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026