49Fault

Felicity inverter error 49 (F49)

INV over Current of software

Also displayed as F49 on some models.

Fault — the inverter cuts its output and the red LED stays solid until the fault is cleared.

The exact meaning depends on your model:

IVGM5KL-P1G1

InverterFault

Also applies to:IVGM6KL-P1G1IVGM7K6L-P1G1IVGM8KL-P1G1

What it means

INV over Current of software — Inverter software over current fault.

Cause: The control software measured inverter output current above its protection limit — usually loads beyond the rated range, or a surge the inverter could not ride through.

How to fix it

  1. Please check whether the load power is within the range
  2. Restart and check whether it is in normal
  3. Seek help from us, if can not go back to normal state.

Source: Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf, p.54

T-REX-3KLP1G01

InverterFault

Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01T-REX-10KHP3G01T-REX-10KLP3G01

What it means

Parallel negative power protection

Cause: One unit in the parallel group was detected absorbing power from the others (negative power flow), which the protection treats as a load-sharing fault and shuts down.

How to fix it

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, p.39 · T-REX-10KHP3G01-Inverter-User-Guide.pdf, p.29 · T-REX-10KLP3G01-Inverter-User-Guide.pdf, p.29

T-REX-50KHP3G01

InverterFault

What it means

Inverter voltage DC component fault — Inverter voltage DC component is too high, shutdown and restart.

Cause: A DC offset beyond the permitted limit was detected riding on the inverter's output voltage — the output stage is no longer producing a symmetrical sine wave.

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: T-REX-50KHP3G01-user-manual-.pdf, p.47

Apollo-5KLP1G01-MX

Energy storage systemFault

Also applies to:Apollo-5KLP1G01-M1Apollo-5KLP1G01-M2Apollo-4K6LP1G01-MXApollo-4K6LP1G01-M1Apollo-4K6LP1G01-M2

What it means

Parallel negative power protection — Parallel negative power protection triggered.

Cause: Parallel negative power protection.

How to fix it

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

Source: Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf, p.44

Frequently asked questions

What does error 49 mean on a Felicity inverter?
It depends on the model — 6 devices use code 49. On the IVGM5KL-P1G1 it means: INV over Current of software. The card for each model on this page gives its exact meaning and fix.
Is error 49 a fault or a warning?
49 is a fault code: the inverter cuts its output and the red LED stays solid until it is cleared.
How do I clear or fix error 49?
1. Please check whether the load power is within the range; 2. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the IVGM5KL-P1G1

All IVGM5KL-P1G1 codes

Other codes on the T-REX-3KLP1G01

All T-REX-3KLP1G01 codes All T-REX-10KHP3G01 codes All T-REX-10KLP3G01 codes

Other codes on the T-REX-50KHP3G01

All T-REX-50KHP3G01 codes

Other codes on the Apollo-5KLP1G01-MX

All Apollo-5KLP1G01-MX 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.