IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 58 for generator under-voltage alarm
Felicity 58 error code
Backup overload fault: the load on the backup output exceeded the inverter's rating; in the warning list the same number means generator under-voltage alarm.
Likely causes
- Backup load above the inverter's continuous rating
- High inrush current from motors or compressors
- Short or faulty appliance on the backup circuit
- For a flashing warning, generator voltage below the inverter's window
Checks to run, in order
- 1Note whether the fault LED is solid (fault) or flashing (warning)
- 2Measure the backup load with a clamp meter and compare with the inverter rating
- 3Switch off loads one by one to identify the culprit
- 4If flashing, measure generator output voltage
Fixes
- Shed load or split the backup circuits
- Stagger motor starting and add soft starters where possible
- Restart after reducing the load
- For the warning, correct the generator voltage or its wiring
When to escalate
If the backup load is within rating and the fault repeats, escalate for inverter inspection.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does Felicity 58 mean?
Backup overload fault: the load on the backup output exceeded the inverter's rating; in the warning list the same number means generator under-voltage alarm.
How do I fix Felicity 58?
Shed load or split the backup circuits Stagger motor starting and add soft starters where possible Restart after reducing the load For the warning, correct the generator voltage or its wiring
When should I escalate Felicity 58?
If the backup load is within rating and the fault repeats, escalate for inverter inspection.
Can I reset Felicity 58 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 58 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 58?
Felicity 58 is documented for IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 58 for generator under-voltage alarm. Confirm the code on your own unit's display or manual before ordering parts.
More Felicity error codes
- Felicity 04Low cell voltage / over-discharge protection.
- Felicity 05PV over-current fault: the PV input current exceeded the inverter's PV input limit.
- Felicity 18PV short-circuit fault on the PV input; in the warning list the same number means battery under-voltage alarm.
- Felicity 19Battery open-circuit alarm: the inverter no longer detects a battery on its terminals.
- Felicity 20Battery SOC low alarm: the battery's state of charge has fallen to the low-SOC warning threshold.
- Felicity 21BMS communication alarm: abnormal communication between battery and inverter in non-SOC mode.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
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