What does error W53 mean on a Felicity inverter?

W53 means: BMS require inverter to charge battery. BMS has requested charging.

Is error W53 a fault or a warning?

W53 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.

Inverter will charge battery automatically. The exact steps for each affected model are listed on this page.

W53

BMS require inverter to charge battery

Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.

It means the same on every affected model — find yours for the exact fix:

InverterWarning

Also applies to:IVEM6048IVEM8048-LVIVEM8048

BMS require inverter to charge battery

Cause: BMS has requested charging.

Inverter will charge battery automatically.

Source: felicitysolar IVEM 6048 Solar Inverter User Guide.pdf, p.36 · FelicitySolar IVEM8048-LV Single Phase Hybrid Inverter User Guide.pdf, p.37

InverterWarning

Also applies to:IVEM12048-IIIVEM 8K-12K Series II

BMS require inverter to charge battery — Warning: BMS require inverter to charge battery. Inverter will charge battery automatically.

Cause: BMS is requesting the inverter to charge the battery.

Inverter will charge battery automatically.

Source: IVEM8K-12K-II_compressed.pdf, p.42

What does error W53 mean on a Felicity inverter?: W53 means: BMS require inverter to charge battery. BMS has requested charging.
Is error W53 a fault or a warning?: W53 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.
How do I clear or fix error W53?: Inverter will charge battery automatically. The exact steps for each affected model are listed on this page.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.