IE16 on a SolaX Power SolaX X1-Hybrid G4: EPS Overload Fault - EPS (off-grid) overload
Short answer
On a SolaX Power inverter, IE16 means: EPS Overload Fault - EPS (off-grid) overload. The inverter keeps running with some functions stopped.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: EPS Overload Fault - EPS (off-grid) overload.
Part involved: Backup/EPS output overload.
Likely causes:
- Too much load on backup.
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
The inverter keeps running with some functions stopped.
Resetting itself: brand-dependent.
Manual reset: reduce load then restart.
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- During a power cut, switch off large loads (kettle, oven, heaters) on backup circuits.
- The SolaX manual lists 'press the ESC key to restart the inverter' for this code (switch off heavy loads first for overload codes).
- 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 backup circuit design vs inverter EPS rating.
- Check for inrush/non-linear loads.
Who to ask for: Battery installer.
Certification: Electrician competent in electrical energy storage (BS 7671 Chapter 57; IET Code of Practice for Electrical Energy Storage Systems), ideally the MCS battery installer (MIS 3012); brand-approved installer to keep 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.123 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026