NO-Grid on a Solis inverter: No grid
Short answer
On a Solis inverter, NO-Grid means: No grid. The inverter stops until the fault clears or is reset. The wording differs by model range — each is shown below.
Reviewed 24 September 2026 · 2 sources
What it means
On the S6-EH1P L-PLUS 48 V hybrids
The manual says: No grid.
Part involved: grid connection.
Likely causes:
- Grid lost or AC breaker/isolator off; AC cable fault.
On the S6-GR1P-S single-phase string inverter
The manual says: No grid voltage.
Part involved: grid connection.
Likely causes:
- Grid not connected / abnormal.
Is it safe?
On the S6-EH1P L-PLUS 48 V hybrids
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
The inverter stops until the fault clears or is reset.
Resetting itself: yes.
Manual reset: Clears when grid restored.
On the S6-GR1P-S single-phase string inverter
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
The inverter stops until the fault clears or is reset.
Resetting itself: yes.
Manual reset: Resumes when grid normal.
What you can check
On the S6-EH1P L-PLUS 48 V hybrids
- 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).
- Check for a power cut.
- If the inverter breaker has tripped, reset once; if it trips again call your installer.
On the S6-GR1P-S single-phase string inverter
- 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).
- Check for a power cut.
- If the solar breaker has tripped, reset once; if it trips again call your installer.
What the engineer will check
On the S6-EH1P L-PLUS 48 V hybrids
- Confirm grid; check AC cable connection; restart.
Who to ask for: Qualified electrician / MCS PV installer.
Certification: None for homeowner checks; any grid-protection setting change needs installer and DNO consent (G98/G99).
On the S6-GR1P-S single-phase string inverter
- Verify grid connection; check mains.
Who to ask for: Qualified electrician / MCS PV installer.
Certification: None for homeowner checks; any grid-protection setting change needs installer and DNO consent (G98/G99).
What you might notice
Sources
- User Manual for S6 Series Hybrid Inverter S6-EH1P(3-8)K-L-PLUS ↗ · Version 1.0 · page 52 · Reviewed 24 September 2026
- User Manual for S6 Series Grid Inverter S6-GR1P(2.5-6)K-S ↗ · Version 1.1 · page 41 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026