Screen on a Solis S6 mini single-phase string inverter S6-GR1PK-M: Inverter internally damaged (screen off while DC present)
Short answer
On a Solis inverter, Screen means: Inverter internally damaged (screen off while DC present). 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: Inverter internally damaged (screen off while DC present).
Part involved: inverter internals.
Likely causes:
- Internal damage.
Is it safe?
Switch the inverter off at its isolator and call an engineer.
| Does the inverter stop? | Yes |
|---|---|
| Severity | Safety lockout |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: Engineer only.
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).
- Do NOT operate the DC switches: Solis warns this can damage the inverter under load. Call your installer.
What the engineer will check
- Wait until irradiance drops and string current <0.5 A (clip-on ammeter), then turn off DC switches.
Who to ask for: MCS-certified solar PV installer (DC/string work) or the original installer.
Certification: Work on DC strings and inverter enclosures: competent PV installer (MCS-certified installer for warranty/SEG continuity); electrical work notifiable under Part P (England & Wales) or equivalent.
What you might notice
Sources
- Solis S6 Mini Single Phase Inverter S6-GR1P(0.7-3.6)K-M(16A) Installation and Operation Manual ↗ · Ver 1.0 · page 50 (mini manual) · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026