Critical

PROT_BAT_UNDERVOLTAGE

Battery Under Voltage Protection.

1 Devices that report this code

What does the PROT_BAT_UNDERVOLTAGE error code mean?

PROT_BAT_UNDERVOLTAGE on a Felicity unit indicates: Battery Under Voltage Protection.. It is a critical-severity event that can appear on 1 device 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 critical-severity code

Critical codes trip the unit offline immediately. They typically indicate hardware failure (short-circuit, IGBT, BMS) or an unsafe operating condition. Do not bypass the fault — note the code and contact authorized service.

What triggers this code

PROT_BAT_UNDERVOLTAGE 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
PROT_BAT_UNDERVOLTAGEBattery Under Voltage Protection.Critical
Description

Battery overall under-voltage protection trip.

Cause

Battery pack voltage dropped below safe minimum (over-discharge).

Recommended fix

Stop discharging; recharge battery promptly. Battery should be charged within 3 months of storage to avoid deep discharge.

Source:LUX-X-96050HG01-Lithium-Battery-User-Guide.pdf · page 7

Frequently asked about PROT_BAT_UNDERVOLTAGE

What is the PROT_BAT_UNDERVOLTAGE error on Felicity?
PROT_BAT_UNDERVOLTAGE on a Felicity unit means: Battery Under Voltage Protection.. It can appear on 1 device in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the PROT_BAT_UNDERVOLTAGE 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 PROT_BAT_UNDERVOLTAGE 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.