What does error 29 mean on a Voltronic inverter?

29 means: Charger failure. Charger failure.

How do I clear or fix error 29?

Shut down the inverter completely. Restart the inverter to see if it's ok. The exact steps for each affected model are listed on this page.

Charger failure

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

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

InverterFault

Also applies to:ESS510

Charger failure

Cause: Charger failure.

Source: InfiniSolarE-5.5KW-manual.pdf, p.45 · ESS510-manual.pdf, p.70

InverterFault

Also applies to:InfiniSolar 2KWInfiniSolar 3KW

Charger failure — Fault code 29 shown on the display with the fault icon on: Charger failure.

Cause: Charger failure.

Source: InfiniSolar-2KW3KW-manual.pdf, p.49

What does error 29 mean on a Voltronic inverter?: 29 means: Charger failure. Charger failure.
Is error 29 a fault or a warning?: 29 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 29?: Shut down the inverter completely. Restart the inverter to see if it's ok. The exact steps for each affected model are listed on this page.

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