Solar · Error codes · SolaX Power
IE109SolaX Power · SolaX X1-Hybrid G4
IE109 on a SolaX Power SolaX X1-Hybrid G4: Meter Fault
Short answer
On a SolaX Power inverter, IE109 means: Meter Fault. 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: Meter Fault.
Part involved: Energy meter / CT clamp communication.
Likely causes:
- Meter incompatible, comms cable, protocol/address/baud mismatch.
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Warning |
| Engineer needed? | Yes |
The inverter keeps running with some functions stopped.
Resetting itself: yes - clears when communication is restored.
Manual reset: no.
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- Check the meter's display is lit (look only).
- Note any recent electrical work near the meter/consumer unit.
- Where the SolaX manual says 'press the ESC key to restart the inverter', a homeowner can do that on the display. Steps that say 'disconnect PV+/PV-/battery' are for the installer only.
What the engineer will check
- Check meter RS485/Modbus wiring polarity and termination.
- Check CT orientation (arrow towards grid/house per manual) and seating.
- Check meter address/baud settings.
- Check export-limit setting (G99) - some inverters stop if export control is on and meter lost.
Who to ask for: PV/battery installer.
Certification: Installer or electrician for meter/CT/comms cabling; homeowner can handle Wi-Fi/router issues.
What you might notice
Sources
- X1-Hybrid-G4 3.0/3.7/5.0/6.0/7.5 kW User Manual Version 3.0 (Version 03, 2024-08-08), doc 320101081103 ↗ · 3.0 · page PDF p.126 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026