Warning

02

Low Battery Voltage.

5 Devices that report this code

What does the 02 error code mean?

02 on a Felicity unit indicates: Low Battery Voltage.. It is a warning-severity event that can appear on 5 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 warning-level code

Warning codes do not stop the unit. They flag a condition that should be addressed before it escalates — usually a near-threshold reading or a configuration check.

What triggers this code

02 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.

LUX-X-96050HG01Battery↗ view on device
02Low Battery Voltage.Warning
Description

Battery pack voltage below the lower threshold.

Cause

Battery pack overall voltage too low (over-discharge condition).

Recommended fix

Stop discharging.

Source:LUX-X-96050HG01-Lithium-Battery-User-Guide.pdf · page 21
LUX-Y-48100HG01Battery↗ view on device
02Low Battery Voltage.Warning
Description

Battery pack voltage fell below the lower threshold.

Recommended fix

Stop discharging.

Source:LUX-Y-48100HG01-Lithium-Battery-User-Guide.pdf · page 20
LUX-Y-48100HG01MNBattery↗ view on device
02Low Battery Voltage.Fault
Description

Low Battery Voltage.

Source:LUX-Y-48100HG01MN User manual 358-S010025-03 0325(V2.0).pdf · page 27
SCCM3024-IIICharge controller↗ view on device
02Over temperature.Critical
Description

The charge controller's internal temperature has exceeded its safe operating range.

Cause

Controller is operating in a hot environment or has insufficient airflow/ventilation, causing the heatsink temperature to exceed safe limits.

Recommended fix

1. Keep the charger in the cool environment. 2. if the problem remains, please contact your installer.

Source:felicitysolar SCCM-III MPPT Solar Charge Controller User Guide.pdf · page 18
T-REX-3KLP1G01Inverter↗ view on device
02Over current happen at PV port.Fault
Description

Over current happen at PV port.

Recommended fix

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

Source:T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf · page 37

Frequently asked about 02

What is the 02 error on Felicity?
02 on a Felicity unit means: Low Battery Voltage.. It can appear on 5 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the 02 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 02 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.