Battery low
Also displayed as F04 on some models.
Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.
Severity differs by model — check your model below.
The exact meaning depends on your model:
Also applies to:IVPS2512IVPS2524IVPS3524IVPS5024IVPS5048IVPS7548IVPS-7548IVPS10048+9
Battery low — The battery voltage is too low.
Cause: The battery is discharged below the low-voltage warning level.
The voltage of the battery is too low; the battery should be charged.
Source: IVPS-IVPM User Guide.pdf, p.18 · IVPS3524P1G1-LV IVPS5048P1G1-LV IVPS7548P2G1 IVPS10048P2G1 User Guide - EN.pdf, p.27
Also applies to:IVCM2024 PROIVCM3024 PRO
PV temperature is too high
Cause: The PV charger stage has overheated above its protection limit, typically because the unit's airflow is blocked or the ambient temperature is too high.
Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source: ICM.pdf, p.13
Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01
Short circuit happen at PV port
Cause: A short circuit was detected at the PV input — the array wiring presents a near-zero-resistance path, so the input stage shut down.
Check if wiring is connect well.
Source: T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf, p.37
Also applies to:IVEM6048IVEM8048-IIIVEM12048-IIIVEM 8K-12K Series IIIVEM8048-LVIVEM8048
Inverter soft start fail
Cause: Internal components failed.
Restart the unit, if the error persists, contact the repair center.
Source: felicitysolar IVEM 6048 Solar Inverter User Guide.pdf, p.36 · IVEM8K-12K-II_compressed.pdf, p.43 · FelicitySolar IVEM8048-LV Single Phase Hybrid Inverter User Guide.pdf, p.37
Short circuit happen at PV port — Short circuit at the PV port.
Cause: A short circuit was detected at the PV input — the array wiring presents a near-zero-resistance path, so the input stage shut down.
Check if wiring is connected well.
Source: T-REX-10KHP3G01-Inverter-User-Guide.pdf, p.28
Short circuit happen at PV port
Cause: A short circuit was detected at the PV input — the array wiring presents a near-zero-resistance path, so the input stage shut down.
Check if wiring is connect well.
Source: T-REX-10KLP3G01-Inverter-User-Guide.pdf, p.27
PV4 overvoltage fault — The voltage of the PV4 is too high, check the voltage of the string.
Cause: The open-circuit voltage of the PV4 string is above the inverter's permitted DC input range — typically a string configured with too many modules in series.
Source: T-REX-50KHP3G01-user-manual-.pdf, p.45
Also applies to:Apollo-5KLP1G01-M1Apollo-5KLP1G01-M2Apollo-4K6LP1G01-MXApollo-4K6LP1G01-M1Apollo-4K6LP1G01-M2
Short circuit happen at PV port
Cause: Short circuit happen at PV port.
Check if wiring is connect well.
Source: Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf, p.42
Also applies to:LUX-X-96050HMG01LUX-X-96050HCG01
Low Cell Voltage — Individual cell voltage below minimum allowed value.
Cause: Cell-level undervoltage (imbalance or deep discharge of a single cell).
Source: LUX-X-96050HG01-Lithium-Battery-User-Guide.pdf, p.21
Also applies to:LUX-Y-48100HCG01LUX-Y-48100HMG01LUX-Y-48100HR13G01LUX-Y-48100HR9G01
Low Cell Voltage — Individual cell voltage fell below the lower threshold.
Cause: Cell-level undervoltage — imbalance or deep discharge of a single cell.
Source: LUX-Y-48100HG01-Lithium-Battery-User-Guide.pdf, p.20
Low Cell Voltage
Cause: Cell-level undervoltage — imbalance or deep discharge of a single cell.
Source: LUX-Y-48100HG01MN User manual 358-S010025-03 0325(V2.0).pdf, p.27
Also applies to:SCCM4524-IIISCCM4548-IIISCCM6048-IIISCCM8048-IIISCCM10048-IIISCCM12048-III
Battery voltage is high — Battery voltage has exceeded the controller's high-voltage disconnect threshold.
Cause: Battery overvoltage condition, possibly due to incorrect battery system voltage setting or external charging source raising battery voltage above safe limits.
Source: felicitysolar SCCM-III MPPT Solar Charge Controller User Guide.pdf, p.18
Cell voltage is too low — Fault event: an individual battery cell voltage fell below its low threshold. Inverter cuts off output and fault LED solid on.
Cause: An individual cell voltage fell below its lower threshold — imbalance or deep discharge of a single cell.
Source: LUX-S-1600LG01.pdf, p.22
All IVEM 6048 codes All IVEM8048-II codes All IVEM8048-LV codes
Prefer the full written guide? Read the complete Felicity inverter error-code guide
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.