Solar · Error codes · Solis
FailSolis · S6-GR1P-S single-phase string inverter
Fail on a Solis S6-GR1P-S single-phase string inverter: Meter communication fail
Short answer
On a Solis inverter, Fail means: Meter communication fail. The inverter keeps running with some functions stopped.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Meter communication fail.
Part involved: export meter/EPM.
Likely causes:
- Meter communication lost - export power manager fails safe (output limited).
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Warning |
The inverter keeps running with some functions stopped.
Resetting itself: yes.
Manual reset: Clears when meter comms restored.
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).
What the engineer will check
- Check meter communication and restart.
Who to ask for: Qualified electrician / MCS PV installer.
Certification: Battery and hybrid-inverter DC work: installer trained/approved by the manufacturer; electrical work under BS 7671 by a competent person.
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