Felicity Solar FLA12100 12.8V 1.28kWh LiFePO4 Battery
- Nominal Energy
- 1.28 kWh
- Nominal Capacity
- 100 Ah
- Nominal Voltage
- 12.8 V
- Cycle Life
- >6000
Price incl. VATAED 704
Felicity FLA12100 Error Codes: Full List & Fixes
This is the complete fault table for the Felicity FLA12100 Battery — all 14 codes from the official manual on one page. On this Felicity device, a fault code means the unit has entered protection and stopped normal operation; a warning leaves it running. The exact indication (LED pattern or display code) is listed per code below.
Last checked against the official manuals on 10 July 2026.
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How to read the severity labels
- Fault(14)— operation stops until cleared
Fault codes (14)operation stops until cleared
Battery overvoltage fault. LED pattern: LED1 FLASH, LED2 OFF, LED3 OFF, LED4 OFF (with FAULT mode: GREEN OFF, RED ON).
CauseThe total battery pack voltage rose above its rated protection value during charging, so the BMS stopped charging. The protection releases once the pack voltage returns to the rated range.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Battery undervoltage fault. LED pattern: LED1 OFF, LED2 ON, LED3 OFF, LED4 OFF.
CauseThe total pack voltage fell below its rated protection value during discharging (over-discharge), so the BMS stopped supplying power. The protection releases once the voltage returns to the rated range.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Cell overvoltage fault. LED pattern: LED1 ON, LED2 ON, LED3 OFF, LED4 OFF.
CauseAn individual cell reached its over-voltage protection value during charging, typically from cell imbalance letting one cell run ahead of the pack, so the BMS stopped charging.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Cell undervoltage fault. LED pattern: LED1 OFF, LED2 OFF, LED3 ON, LED4 OFF.
CauseAn individual cell fell below its under-voltage protection value during discharging, usually deep discharge or a weak, imbalanced cell, so the BMS stopped supplying power.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Charge overcurrent fault. LED pattern: LED1 ON, LED2 OFF, LED3 ON, LED4 OFF.
CauseThe charging current reached the BMS trigger value and stayed there for 15 seconds, activating charge overcurrent protection: the charger or inverter is pushing more current than the pack accepts. The battery disables both charging input and discharging output while in fault mode.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Discharge overcurrent fault. LED pattern: LED1 OFF, LED2 ON, LED3 ON, LED4 OFF.
CauseThe discharging current reached the BMS trigger value and stayed there for 15 seconds, activating discharge overcurrent protection: the load or inverter is drawing more current than the pack's discharge limit. The battery disables both charging input and discharging output while in fault mode.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
MOSFET over-temperature fault. LED pattern: LED1 ON, LED2 ON, LED3 ON, LED4 OFF.
Cause1. The inner temperature is over the limitation. 2. The ambient temperature may be too high.
Recommended fixCheck whether the ambient temperature is too high.
Source:fla12100pg2-user-guide-english.pdf· page 1
MOSFET under-temperature fault. LED pattern: LED1 OFF, LED2 OFF, LED3 OFF, LED4 ON.
Cause1. The internal temperature is lower than the limit range. 2. The ambient temperature may be too low.
Recommended fixCheck whether the ambient temperature is too low.
Source:fla12100pg2-user-guide-english.pdf· page 1
Cell over-temperature fault. LED pattern: LED1 ON, LED2 OFF, LED3 OFF, LED4 ON.
CauseInverter internal temperature has exceeded the safe operating threshold. Causes include high ambient temperature, blocked cooling vents, failed cooling fan, or installation in direct sunlight.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Cell under-temperature fault. LED pattern: LED1 OFF, LED2 ON, LED3 OFF, LED4 ON.
CauseInverter ambient temperature is below the minimum operating range. Most common in unheated outdoor installs in winter.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Abnormal current sampling fault. LED pattern: LED1 ON, LED2 ON, LED3 OFF, LED4 ON.
CauseThe BMS current sensor or its sampling circuit returned an abnormal reading. This is an internal hardware fault in the current-measurement path, not an installation issue.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Abnormal output impedance fault. LED pattern: LED1 OFF, LED2 OFF, LED3 ON, LED4 ON.
CauseThe BMS measured abnormal impedance on the battery's output path, commonly a loose or corroded output terminal connection, or a contactor or wiring issue.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Parallel connection failure between battery units. LED pattern: LED1 ON, LED2 OFF, LED3 ON, LED4 ON.
CauseSingle unit may be installed to a parallel system, or wiring connection between parallel units is incorrect/incomplete.
Recommended fix1. Check if a single unit is installed to a parallel system. 2. if this error happens during parallel installation, check wire connections; if connected correctly, finish parallel installation first and then restart the unit. 3. if the problem remains, contact your installer.
Source:fla12100pg2-user-guide-english.pdf· page 1
Output loss fault. LED pattern: LED1 OFF, LED2 ON, LED3 ON, LED4 ON.
CauseThe battery's output path is interrupted: the circuit breaker is open or the fuse has blown.
Recommended fix1. Check whether the circuit breaker is closed. 2. Check whether the fuse is normal. 3. Restart the unit. if the error persists, contact the repair center.
Source:fla12100pg2-user-guide-english.pdf· page 1
Still seeing a code on your FLA12100?
Send us the code on your screen and a Felicity technician will reply with the exact steps for your unit. If the unit needs replacing, order it online.
Keep troubleshooting
- All Felicity error codesSearch every device and code in the database
- Felicity Inverter Error Code List: All IVPS ModelsThe step-by-step troubleshooting guide
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Common questions about FLA12100 error codes
- What is the difference between a fault and a warning on the FLA12100?
- A fault puts the unit into protection and stops normal operation — this page lists 14 of them for the FLA12100. The FLA12100 manual defines no separate warning table — every listed code stops operation. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.
- Does this page apply to other Felicity models?
- No — this table was transcribed specifically from the FLA12100 manual. Other Felicity devices have their own pages; start from the error-code hub to find the one matching the model number on your unit's label.
- Where do these codes come from?
- Every entry was transcribed from fla12100pg2-user-guide-english.pdf — Felicity's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.