IVGM5-8K LP2G1 hybrid inverters (warning code list, flashing fault LED)
Felicity 19 error code
Battery open-circuit alarm: the inverter no longer detects a battery on its terminals.
Likely causes
- Battery breaker open or fuse blown
- Battery cable disconnected or broken
- Battery BMS in protection and output off
- Loose battery terminal
Checks to run, in order
- 1Check the battery breaker and fuse
- 2Measure DC voltage at the battery terminals and at the inverter battery terminals
- 3Inspect the battery cables and terminals
- 4Check whether the battery BMS is awake and out of protection
Fixes
- Close the breaker or replace the blown fuse
- Reconnect or replace the battery cable
- Wake the battery and restart the inverter
When to escalate
If the battery voltage is present at the inverter terminals and code 19 persists, escalate for inverter battery-input service.
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 19 mean?
Battery open-circuit alarm: the inverter no longer detects a battery on its terminals.
How do I fix Felicity 19?
Close the breaker or replace the blown fuse Reconnect or replace the battery cable Wake the battery and restart the inverter
When should I escalate Felicity 19?
If the battery voltage is present at the inverter terminals and code 19 persists, escalate for inverter battery-input service.
Can I reset Felicity 19 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 19 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 19?
Felicity 19 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 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.
- 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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