b50Fault

Felicity inverter error b50

BMS doesn't allow inverter to charge battery

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

T-REX-3KLP1G01

InverterFault

Also applies to:T-REX-3K6LP1G01T-REX-4KLP1G01T-REX-4K6LP1G01T-REX-5KLP1G01T-REX-6KLP1G01

What it means

BMS doesn't allow inverter to charge battery — BMS doesn't allow inverter to charge battery (LCD information code shown during BMS communication).

Cause: Communication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.

How to fix it

Informational; inverter follows BMS instruction.

Source: t-rex-3-3.6-4.6-5-6klp1g01-user-guide-english.pdf, p.17

Frequently asked questions

What does error b50 mean on a Felicity inverter?

b50 means: BMS doesn't allow inverter to charge battery. Communication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.

Is error b50 a fault or a warning?

b50 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 b50?

Informational; inverter follows BMS instruction.

Related error codes

Other codes on the T-REX-3KLP1G01

All T-REX-3KLP1G01 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.