Fault

C01

Battery overvoltage.

17 Devices that report this code

What does the C01 error code mean?

C01 on a Felicity unit indicates: Battery overvoltage.. It is a fault-severity event that can appear on 17 different devices in the Felicity catalog. The same code may have slightly different recommended fixes depending on the device — the per-device sections below show the exact wording from each device's official manual.

This is a fault-severity code

Fault codes stop normal operation but the unit may attempt to recover. Common causes are out-of-range conditions (voltage, current, temperature) that require checking inputs and outputs before restart.

What triggers this code

C01 is triggered when the unit's protection or monitoring logic detects the specific condition described above. The exact trigger depends on the device — see the per-device sections for the official manual entry for each.

FLA12100Battery↗ view on device
C01Battery overvoltage.Fault
Description

Battery overvoltage fault. LED pattern: LED1 FLASH, LED2 OFF, LED3 OFF, LED4 OFF (with FAULT mode: GREEN OFF, RED ON).

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:Felicitysolar FLA12100 12.5Kwh Battery Energy Storage System User Manual.pdf · page 1
FLA48200Battery↗ view on device
C01Battery overvoltage.Fault— high
Description

Total battery pack voltage exceeded the upper limit.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf · page 12
FLA48250Battery↗ view on device
C01Battery overvoltage.Critical
Description

BMS reports total battery pack voltage above the upper protection threshold.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:6peluqppy_66a93554057c8.pdf · page 12
FLA48250-EUBattery↗ view on device
C01C01Fault
Description

Battery overvoltage.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:FLA48250-EU_Manual.pdf · page 8
FLA48500Battery↗ view on device
C01Battery overvoltage.Fault
Description

Battery overvoltage protection triggered (pack-level voltage exceeded threshold).

Cause

Battery pack voltage above operating limit (operating range 44.8-57.6V; max charging voltage 57.6V).

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdf
FLS48100SG2Battery↗ view on device
C01Batterie-Überspannung.Fault
Description

Battery overvoltage. Total pack voltage exceeded the rated upper protection threshold during charging.

Cause

Total battery pack voltage above rated value (Gesamtspannung des Akkupacks über dem Nennwert). Charging continued past the over-voltage protection point.

Recommended fix

Restart the unit. if the error persists, return to repair centre. (Gerät neu starten; bei Wiederauftreten zur Reparatur einsenden.).

Source:Benutzerhandbuch - Felicity FLS48100SG2.pdf
HE-GF-FLA-48500Battery↗ view on device
C01Battery overvoltage.Fault
Description

Battery overvoltage protection triggered (pack-level voltage exceeded threshold).

Cause

Battery pack voltage above operating limit (operating range 44.8-57.6V; max charging voltage 57.6V).

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:HE-GF-FLA-48500 Manual_20250327_EN.pdf
LPBF48100-MBattery↗ view on device
C01Battery overvoltage.Fault
Description

Pack-level over-voltage fault displayed on the LCD BMS fault code / flag screen (section 4.3-4.4); fault icon is constant.

Cause

Pack voltage exceeded the BMS over-voltage threshold during charging - typically because the charger's Max. Charging Voltage is set above the recommended 57.6 V (section 2.4 Recommended Settings).

Recommended fix

Restart the unit; if the error persists, contact the repair center. Verify the charger / inverter Max. Charging Voltage and Floating Charging Voltage are set to 57.6 V and pack voltage stays within the 48-57.6 V operating range.

Source:358-010291-07.pdf · page 8
LPBF48200-HBattery↗ view on device
C01Battery overvoltage.Fault
Description

Battery pack overall voltage above protection threshold (BMS protection).

Cause

Total battery voltage has exceeded the BMS upper voltage limit.

Recommended fix

Restart the unit; if the error persists, contact the repair center.

Source:Manual-LPBF48200-H.pdf · page 10
LPBF48350Battery↗ view on device
C01C01Fault
Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdf
LUX-E-48100LG03Battery↗ view on device
C01Battery overvoltage.Fault
Cause

Battery pack voltage exceeded the upper protection threshold.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-E-48100LG03-Lithium-Battery-User-Guide.pdf · page 12
LUX-E-48200LG03Battery↗ view on device
C01C01Fault
Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-E-48200LG03-Lithium-Battery-User-Guide.pdf · page 12
LUX-E-48230LG03Battery↗ view on device
C01C01Fault
Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-E-48230.250LG03-Lithium-Battery-User-Guide.pdf
LUX-X-48050LG01Battery↗ view on device
C01C01Fault
Description

Battery overvoltage.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:LUX-X-48050LG01-low-voltage-battery-user-guide.pdf · page 17
LUX-X-48100LG01Battery↗ view on device
C01Battery overvoltage.Critical
Description

Total battery pack voltage has exceeded the upper protection threshold.

Recommended fix

Restart the unit; if the error persists, contact the repair center.

Source:LUX-X-48100LG01-Litium-Battery-User-Guide.pdf · page 17
LUX-X-48100LG01-USBattery↗ view on device
C01Battery overvoltage.Critical
Description

Total battery pack voltage has exceeded the upper protection threshold.

Recommended fix

Restart the unit, if the error persists, contact the repair center.

Source:358-S010024-03LUX-X-48100LG01-User-manual_compressed.pdf · page 23
LUX-Y-48280LG01Battery↗ view on device
C01Battery overvoltage.Fault
Cause

Battery pack voltage exceeded the upper protection threshold.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-Y-4828048300LG01-Lithium-Battery-User-Guide.pdf · page 8

Frequently asked about C01

What is the C01 error on Felicity?
C01 on a Felicity unit means: Battery overvoltage.. It can appear on 17 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the C01 code myself?
It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.
Is the C01 fix the same on every device?
The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.
Where does this information come from?
Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.