IVGM5-8K LP2G1 hybrid inverters (warning code list, flashing fault LED)
Felicity 22 error code
Battery under-voltage alarm or battery SOC low alarm: battery voltage is too low, or the BMS reports SOC too low, and the battery should be charged.
Likely causes
- Battery discharged after a long outage
- PV or grid charging unavailable
- Low-voltage cutoff set too low
- BMS SOC drift or a weak pack
Checks to run, in order
- 1Read the battery voltage and SOC on the display or app
- 2Confirm the PV and grid charge sources are available
- 3Compare the cutoff setting with the battery datasheet
- 4Check whether the pack recovers when charging
Fixes
- Recharge the battery from PV or grid
- Disconnect non-essential loads until it recovers
- Correct the low-voltage cutoff if it is below the battery datasheet
When to escalate
If the battery will not accept charge, or the alarm returns immediately after a full charge, escalate for battery testing.
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 22 mean?
Battery under-voltage alarm or battery SOC low alarm: battery voltage is too low, or the BMS reports SOC too low, and the battery should be charged.
How do I fix Felicity 22?
Recharge the battery from PV or grid Disconnect non-essential loads until it recovers Correct the low-voltage cutoff if it is below the battery datasheet
When should I escalate Felicity 22?
If the battery will not accept charge, or the alarm returns immediately after a full charge, escalate for battery testing.
Can I reset Felicity 22 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 22 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 22?
Felicity 22 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.
Back to troubleshooting