What does error W03 mean on a Voltronic inverter?

It depends on the model — 35 devices use code W03. On the Axpert MAX II TWIN it means: Battery is over-charged. The card for each model on this page gives its exact meaning and fix.

Is error W03 a fault or a warning?

W03 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 W03?

Return to repair center. The exact steps for each affected model are listed on this page.

W03

Voltronic inverter error W03

Battery is over-charged

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

The exact meaning depends on your model:

Axpert MAX II TWIN

InverterWarning

Also applies to:Axpert MAX II TWIN 8KWAxpert MAX II TWIN 11KWAxpert MAX II TWIN 12KWAxpert MAX II Duplex 8KWAxpert MAX II Duplex 11KWAxpert MAX II 8KWAxpert MAX II 11KWAxpert MAX 8K TWIN PV11K+33

What it means

Battery is over-charged — Warning code 03 flashing on the display: Battery is over-charged. Audible alarm: beep once every second.

Cause: Battery is over-charged.

How to fix it

Return to repair center.

Source: Axpert-MAXII-8K-TWIN-Off-grid-manual.pdf, p.48 · Axpert-MAXII-11K-TWIN-Off-grid-manual.pdf, p.48 · Axpert-MAXII-8K-Duplex-Off-grid-manual.pdf, p.45 · +22 more official manuals

InfiniSolar V II

InverterWarning

Also applies to:InfiniSolar V II 2KWInfiniSolar V II 3KWInfiniSolar V II 5KWInfiniSolar V II 1.5KWInfiniSolar V II 2P 6KWInfiniSolar V II WP 2KWInfiniSolar V II WP 3KWInfiniSolar V II WP 5KW+5

What it means

Battery over charged — Warning code 03 flashing on the display: Battery over charged.

Cause: Battery over charged.

How to fix it

The unit keeps operating.
Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.

Source: InfiniSolarVII_2KW-3KW-5KW_manual.pdf, p.25 · InfiniSolarVII_1.5KW_manual.pdf, p.26 · InfiniSolar-VII-2P-6KW-manual-20201207.pdf, p.29 · +2 more official manuals

InfiniSolar WP LV 12KW Premium

InverterWarning

Also applies to:InfiniSolar 10KWInfiniSolar 15KWInfiniSolar Super 4KWInfiniSolar Plus 5KW

What it means

Line frequency high loss — Warning code 03 flashing on the display: Line frequency high loss.

Cause: Grid frequency is too high.

How to fix it

The unit keeps operating.
Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.

Source: InfiniSolar-WP-LV-12KW-Premium-manual.pdf, p.51 · InfiniSolar-10KW-manual-20191126.pdf, p.49 · InfiniSolar-15K-manual-20200313.pdf, p.50 · +2 more official manuals

InfiniSolar TX-PA 30KW

InverterWarning

What it means

LineLLoss — Warning code 03 flashing on the display: LineLLoss.

Cause: Grid voltage is too low.

How to fix it

The unit keeps operating.
Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.

Source: InfiniSolar-TX-PA_manual.pdf, p.49

Giant Elite 3P/3P

upsWarning

Also applies to:Giant Elite 3P/3P 10K-40KVA

What it means

battery over charge — Warning code 03 flashing on the display: battery over charge.

Cause: battery over charge.

How to fix it

The unit keeps operating.
Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.

Source: Giant-Elite-3P3P-manual.pdf, p.41

Frequently asked questions

What does error W03 mean on a Voltronic inverter?: It depends on the model — 35 devices use code W03. On the Axpert MAX II TWIN it means: Battery is over-charged. The card for each model on this page gives its exact meaning and fix.
Is error W03 a fault or a warning?: W03 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 W03?: Return to repair center. The exact steps for each affected model are listed on this page.

Related error codes

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

Axpert MAX II TWIN

What it means

How to fix it

InfiniSolar V II

What it means

How to fix it

InfiniSolar WP LV 12KW Premium

What it means

How to fix it

InfiniSolar TX-PA 30KW

What it means

How to fix it

Giant Elite 3P/3P

What it means

How to fix it

Frequently asked questions

Related error codes

Other codes on the Axpert MAX II TWIN

Other codes on the InfiniSolar V II

Other codes on the InfiniSolar WP LV 12KW Premium

Other codes on the InfiniSolar TX-PA 30KW

Other codes on the Giant Elite 3P/3P