Solar · Error codes · Solis
GridSolis · S6-GR1P-S single-phase string inverter
Grid on a Solis S6-GR1P-S single-phase string inverter: Over grid voltage
Short answer
On a Solis inverter, Grid means: Over grid voltage. The inverter stops until the fault clears or is reset.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Over grid voltage.
Part involved: grid over-voltage protection.
Likely causes:
- Short-term grid abnormality; persistent high grid voltage.
Is it safe?
| 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 automatically when grid normal - no manual intervention needed.
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).
- If it happens occasionally it is a short grid disturbance and clears itself; if frequent (especially sunny afternoons) ask your installer to check local voltage with the DNO.
What the engineer will check
- Check grid voltage/frequency within range and AC breaker/output cable; with DNO consent change protection points via customer service.
Who to ask for: Installer, with DNO (network operator) if grid supply is at fault.
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 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