IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED)
Felicity 40 error code
Battery short-circuit fault detected on the battery port.
Likely causes
- Shorted battery cable or terminal
- Reverse-connected battery polarity
- Internal battery pack short
- Conductive object bridging the battery terminals or busbars
Checks to run, in order
- 1Disconnect the battery and inspect the cables and terminals for damage
- 2Check polarity at the inverter and at each pack
- 3Measure resistance across the battery port with the battery isolated
- 4Check the battery breaker and internal busbars for a short
Fixes
- Repair or replace the shorted battery cable
- Correct the polarity and reconnect
- Clear the fault and restart the inverter
- Take the battery out of service if the pack itself is shorted
When to escalate
If the battery port still reads shorted with the battery cables removed, or a pack is internally shorted, escalate immediately - do not re-energise.
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 40 mean?
Battery short-circuit fault detected on the battery port.
How do I fix Felicity 40?
Repair or replace the shorted battery cable Correct the polarity and reconnect Clear the fault and restart the inverter Take the battery out of service if the pack itself is shorted
When should I escalate Felicity 40?
If the battery port still reads shorted with the battery cables removed, or a pack is internally shorted, escalate immediately - do not re-energise.
Can I reset Felicity 40 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 40 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 40?
Felicity 40 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.
Back to troubleshooting