This is the complete fault table for the Felicity LPBF48350 Battery — all 13 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 July 10, 2026.
CauseBattery overvoltage — total pack voltage exceeded the upper protection threshold; charging continued past the over-voltage protection point.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseBattery undervoltage — total pack voltage fell below the lower protection threshold (over-discharge).
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseCell overvoltage — a single cell reached the protection value during charging, typically from cell imbalance letting one cell drift above its safe ceiling.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseCell undervoltage — a single cell fell below the protection value during discharge, from deep discharge or a weak, aged cell.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseCharge overcurrent — charging current exceeded the protection trigger value; the inverter or charger charge-current setting is too high for this pack.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseDischarge overcurrent — discharging current exceeded the protection trigger value; the connected load or inverter discharge current is too high.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseMOS overtemperature — the inner (MOSFET) temperature is over the limit; the ambient temperature may be too high.
Recommended fix1. The inner temperature is too high. 2. Check whether the ambient temperature is too high.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseMOS undertemperature — the internal (MOSFET) temperature is lower than the limit range; the ambient temperature may be too low.
Recommended fix1. The internal temperature is lower than the limit range. 2. Check whether the ambient temperature is too low.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseCell overtemperature — a battery cell exceeded the upper temperature protection limit, possibly from excessive ambient temperature, high current, or impaired ventilation.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseCell undertemperature — a battery cell fell below the lower temperature protection limit; the ambient temperature is too low.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseAbnormal current sampling — the internal current sensor or sampling circuit reported abnormal values (internal BMS hardware fault).
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
CauseAbnormal output impedance — the output impedance is outside the normal range, possibly a loose connection, oxidised terminal, or unusual load.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
Cause1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and t hen Restart the unit. 3. if the problem remains, please contact your installer.
Recommended fixPer the manual: verify whether a single unit is installed in a parallel system; if the error occurs during parallel installation, check wiring connections, complete parallel installation, then restart the unit; if the problem persists, contact your installer.
Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
Send us the code on your screen and a Felicity technician will reply with the exact steps for your unit. Support is free for life — a first diagnosis never needs a callout.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.