IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 57 for generator over-voltage alarm
Felicity 57 error code
Grid overload fault (solid LED): the grid input is overloaded; in the warning list the same number is the generator over-voltage alarm (flashing LED).
Likely causes
- Grid input current above the inverter's limit
- Export or grid-power limit set too low for the site
- Generator voltage above the inverter's window (warning variant)
- Grid wiring or measurement fault
Checks to run, in order
- 1Note whether the fault LED is solid (fault) or flashing (warning)
- 2If flashing, measure the generator voltage and check its AVR
- 3If solid, measure the grid current and compare with the configured limit
- 4Check the grid input terminals and breaker
Fixes
- For the warning, correct the generator voltage or reduce its load
- For the fault, raise the grid limit only within the approved settings or reduce the site load
- Restart and confirm the code clears
When to escalate
If code 57 persists with the grid current inside the approved limit, escalate for grid-input service.
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 57 mean?
Grid overload fault (solid LED): the grid input is overloaded; in the warning list the same number is the generator over-voltage alarm (flashing LED).
How do I fix Felicity 57?
For the warning, correct the generator voltage or reduce its load For the fault, raise the grid limit only within the approved settings or reduce the site load Restart and confirm the code clears
When should I escalate Felicity 57?
If code 57 persists with the grid current inside the approved limit, escalate for grid-input service.
Can I reset Felicity 57 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 57 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 57?
Felicity 57 is documented for IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 57 for generator over-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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