IVGM5-8K LP2G1 hybrid inverters (warning code list, flashing fault LED)
Felicity 20 error code
Battery SOC low alarm: the battery's state of charge has fallen to the low-SOC warning threshold.
Likely causes
- Extended discharge with no PV or grid charging
- Grid or PV charge source unavailable
- Charge settings or time-of-use schedule preventing recharge
- BMS SOC drift or a weak pack
Checks to run, in order
- 1Read the battery SOC on the inverter or BMS display
- 2Confirm the PV and grid charge sources are available
- 3Check the charge enable settings and time-of-use schedule
- 4Compare the BMS SOC with the measured pack voltage
Fixes
- Recharge the battery from PV or grid
- Restore the missing charge source
- Correct the charge schedule so the pack recharges daily
When to escalate
If the pack will not accept charge or the SOC keeps collapsing 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 20 mean?
Battery SOC low alarm: the battery's state of charge has fallen to the low-SOC warning threshold.
How do I fix Felicity 20?
Recharge the battery from PV or grid Restore the missing charge source Correct the charge schedule so the pack recharges daily
When should I escalate Felicity 20?
If the pack will not accept charge or the SOC keeps collapsing after a full charge, escalate for battery testing.
Can I reset Felicity 20 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 20 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 20?
Felicity 20 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 21BMS communication alarm: abnormal communication between battery and inverter in non-SOC mode.
- Felicity 22Battery 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.
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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