State on a Solis S6-GR1P-S single-phase string inverter: G100 State 2 excursion - export current exceeded the G100 backflow limit
Short answer
On a Solis inverter, State means: G100 State 2 excursion - export current exceeded the G100 backflow limit. The inverter keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: G100 State 2 excursion - export current exceeded the G100 backflow limit.
Part involved: G100 export limitation (UK).
Likely causes:
- Current flow exceeded 'G100V2 Backflow Current' in G100 scenarios (export limit breached).
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The inverter keeps running with some functions stopped.
Resetting itself: no.
Manual reset: G100 requires manual reset: Settings > EPM Setting > Built-in EPM Setting > G100V2 Alarm Clear.
What you can check
- Read the full code and message on the inverter screen or in the SolisCloud app and note the date/time for your installer.
- Check the inverter's AC isolator next to the inverter and the solar/battery breaker in the consumer unit are ON (do not reset a breaker that trips again - call your installer).
- This is a UK export-limit (ENA G100) alarm that must be manually reset - ask your installer, who should also check why the export limit was exceeded.
What the engineer will check
- Reset via EPM menu after finding cause (CT position/ direction, meter, limit setting).
Who to ask for: Qualified electrician / MCS PV installer.
Certification: Export limitation scheme per ENA EREC G100; installer responsible for configuration.
What you might notice
Sources
- User Manual for S6 Series Grid Inverter S6-GR1P(2.5-6)K-S ↗ · Version 1.1 · page 44 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026