IVGM5-8K LP2G1 hybrid inverters (warning code list, flashing fault LED)
Felicity 48 error code
Backup overload alarm: the load on the backup output is above the inverter's continuous rating and should be reduced.
Likely causes
- Backup load above the inverter's continuous rating
- High inrush from motors or compressors
- Faulty appliance drawing excess current
- Loads spread unevenly across a parallel system
Checks to run, in order
- 1Measure the backup load with a clamp meter and compare with the inverter rating
- 2Switch off loads one at a time to find the culprit
- 3Check for a faulty appliance or a short on one circuit
- 4Review start-up surge of motor loads
Fixes
- Shed load or move non-essential circuits off the backup output
- Stagger motor starts and fit soft starters where possible
- Repair or replace the faulty appliance
When to escalate
If the measured load is within rating and the alarm repeats, escalate for inverter output-stage 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 48 mean?
Backup overload alarm: the load on the backup output is above the inverter's continuous rating and should be reduced.
How do I fix Felicity 48?
Shed load or move non-essential circuits off the backup output Stagger motor starts and fit soft starters where possible Repair or replace the faulty appliance
When should I escalate Felicity 48?
If the measured load is within rating and the alarm repeats, escalate for inverter output-stage inspection.
Can I reset Felicity 48 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 48 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 48?
Felicity 48 is documented for IVGM5-8K LP2G1 hybrid inverters (warning code list, flashing 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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