PROT-BAT-UNDERVOLTFault

Felicity battery error PROT-BAT-UNDERVOLT

Battery Under Voltage protection

Fault — the battery enters fault protection and stops normal operation until the fault is cleared — how it is shown (LED pattern or display code) depends on the model.

LPBA48100-OL

BatteryFault

What it means

Battery Under Voltage protection — Listed under 7.1 Battery System Features 'Battery Protection': protects against under-voltage at the battery side (min discharge voltage 48 V per spec).

Cause: Battery voltage fell below the under-voltage protection value (48 V minimum discharge voltage per spec) — the pack was discharged too deeply before the protection stepped in.

How to fix it

  1. Power down the inverter, wait 5 minutes for capacitors to discharge, then restart.
  2. If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.

Source: felicity-5.1-kwh-user-manual.pdf, p.4

Frequently asked questions

What does error PROT-BAT-UNDERVOLT mean on a Felicity battery?
PROT-BAT-UNDERVOLT means: Battery Under Voltage protection. Battery voltage fell below the under-voltage protection value (48 V minimum discharge voltage per spec) — the pack was discharged too deeply before the protection stepped in.
Is error PROT-BAT-UNDERVOLT a fault or a warning?
PROT-BAT-UNDERVOLT is a fault code: the battery enters protection and stops normal operation until it is cleared.
How do I clear or fix error PROT-BAT-UNDERVOLT?
Power down the inverter, wait 5 minutes for capacitors to discharge, then restart. If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.

Related error codes

Other codes on the LPBA48100-OL

All LPBA48100-OL 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.