1001 on a Sigenergy SigenStor: The software version does not match. Official suggestion (summarised): Upgrade again; if unsuccessful submit fault feedback in app
Short answer
On a Sigenergy inverter, 1001 means: The software version does not match. Official suggestion (summarised): Upgrade again; if unsuccessful submit fault feedback in app. The inverter keeps running with some functions stopped.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: The software version does not match. Official suggestion (summarised): Upgrade again; if unsuccessful submit fault feedback in app.
Likely causes:
- Internal software versions do not match (e.g. unsuccessful upgrade).
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Warning |
The inverter keeps running with some functions stopped.
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.
What the engineer will check
- Re-run firmware upgrade remotely.
- Sub-IDs: ID1-ID3 inverter software / software-hardware / protocol version mismatch.
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