IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED)
Felicity 25 error code
Battery over-voltage fault: the battery voltage exceeded the inverter's specification.
Likely causes
- Charge voltage set above the battery's specification
- Battery bank voltage or chemistry does not match the inverter configuration
- Loose or incorrect battery cables causing a sensing error
- A cell running ahead of the pack because of imbalance
Checks to run, in order
- 1Measure the battery voltage at the inverter terminals and compare with the battery specification
- 2Check the selected battery type and charge voltage in the inverter settings
- 3Check that the number and model of batteries match the design
- 4Inspect battery cables for tightness and correct polarity
Fixes
- Stop charging and let the pack settle, then correct the charge voltage to the battery datasheet
- Select the correct battery profile or BMS protocol
- Tighten or replace the battery cables, then restart 2-3 times
- If the voltage stays high with charging off, arrange battery service
When to escalate
If the pack voltage remains above specification with the charger stopped, or a cell is visibly out of balance, escalate to the distributor.
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 25 mean?
Battery over-voltage fault: the battery voltage exceeded the inverter's specification.
How do I fix Felicity 25?
Stop charging and let the pack settle, then correct the charge voltage to the battery datasheet Select the correct battery profile or BMS protocol Tighten or replace the battery cables, then restart 2-3 times If the voltage stays high with charging off, arrange battery service
When should I escalate Felicity 25?
If the pack voltage remains above specification with the charger stopped, or a cell is visibly out of balance, escalate to the distributor.
Can I reset Felicity 25 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 25 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 25?
Felicity 25 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.
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