1004 on a Sigenergy SigenStor: Equipment fault. Official suggestion (summarised): Standby/shutdown, open DC and AC switches, wait until fully powered down, restore and boot; if not cleared submit fault feedback
Short answer
On a Sigenergy inverter, 1004 means: Equipment fault. Official suggestion (summarised): Standby/shutdown, open DC and AC switches, wait until fully powered down, restore and boot; if not cleared submit fault feedback. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Equipment fault. Official suggestion (summarised): Standby/shutdown, open DC and AC switches, wait until fully powered down, restore and boot; if not cleared submit fault feedback.
Likely causes:
- Internal circuit fault.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: see notes.
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.
- Restart via the mySigen app (owner account can issue standby/shutdown then startup).
What the engineer will check
- Power-cycle including DC/AC switches.
- Component replacement.
- Sub-IDs: ID1 power module; ID2 control module; ID3 auxiliary power supply; ID4 built-in PID module; ID5 monitoring module; ID6 heating film; ID7 external fan; ID8 abnormal night-time PID; ID9 energy storage cluster fault.
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