IE02 on a SolaX Power SolaX X1-Hybrid G4: Grid Lost Fault
Short answer
On a SolaX Power inverter, IE02 means: Grid Lost Fault. The inverter stops until the fault clears or is reset.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Grid Lost Fault.
Part involved: Loss-of-mains / anti-islanding.
Likely causes:
- Power cut.
- AC connection/breaker off.
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 - restarts after the reconnection time once mains returns.
Manual reset: no.
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- Check whether there is a power cut (other lights/sockets, DNO 105 service).
- Check the solar/battery AC isolator and the consumer-unit breaker/RCD are ON (do not reset a breaker that trips again immediately).
- 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 AC isolator, breaker and terminations at the inverter.
- Measure L-N voltage at inverter terminals.
- Check neutral connection.
Who to ask for: PV installer / electrician.
Certification: Electrician competent in grid-connected PV (BS 7671 Section 712; IET Code of Practice for Grid-connected Solar PV), ideally the original MCS-certified PV installer; brand-approved/trained installer to keep manufacturer warranty.
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.121 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026