IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED)
Felicity 88 error code
Parallel system error: another inverter in the parallel system is in an error state.
Likely causes
- One inverter in the parallel group has its own fault
- Parallel communication wiring disturbed
- An inverter was powered down or restarted alone
- Mismatched parallel configuration
Checks to run, in order
- 1Read the display on every inverter in the parallel group
- 2Identify and clear the fault on the unit showing its own code
- 3Check the parallel communication cables
- 4Restart the whole group together, not one unit at a time
Fixes
- Clear the originating fault on the affected inverter
- Reseat the parallel cables
- Restart the whole parallel group together and confirm the code clears
When to escalate
If every unit reports healthy but code 88 persists, escalate for parallel-system diagnostics.
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 88 mean?
Parallel system error: another inverter in the parallel system is in an error state.
How do I fix Felicity 88?
Clear the originating fault on the affected inverter Reseat the parallel cables Restart the whole parallel group together and confirm the code clears
When should I escalate Felicity 88?
If every unit reports healthy but code 88 persists, escalate for parallel-system diagnostics.
Can I reset Felicity 88 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 88 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 88?
Felicity 88 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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