IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED)
Felicity 79 error code
Generator port wrongly connected: the GEN port is set to smart-load mode but a generator or grid source is connected to it.
Likely causes
- GEN port configured as a smart load while a generator or grid is wired to it
- Installer left the GEN input connected after changing the mode
- Wrong port used for the generator
- Wiring changed without updating the inverter mode
Checks to run, in order
- 1Check whether the GEN port is configured as smart load
- 2Trace the wiring on the GEN terminals to its source
- 3Confirm the generator is on the intended input
- 4Review the installation drawing against the settings
Fixes
- Move the generator to the correct input, or change the GEN port mode to match the wiring
- Restart and confirm the code clears
- Recheck the smart-load schedule if that mode is required
When to escalate
If the wiring and mode now match but code 79 persists, escalate for GEN-port detection 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 79 mean?
Generator port wrongly connected: the GEN port is set to smart-load mode but a generator or grid source is connected to it.
How do I fix Felicity 79?
Move the generator to the correct input, or change the GEN port mode to match the wiring Restart and confirm the code clears Recheck the smart-load schedule if that mode is required
When should I escalate Felicity 79?
If the wiring and mode now match but code 79 persists, escalate for GEN-port detection service.
Can I reset Felicity 79 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 79 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 79?
Felicity 79 is documented for IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED). 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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