W12Warning

Voltronic inverter error W12

Solar charger stops due to low battery

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

The exact meaning depends on your model:

Axpert 3KP/5KP 24V

InverterWarning

Also applies to:Axpert 3KP 24VAxpert 5KP 24V

What it means

Solar charger stops due to low battery — Warning code 12 flashing on the display: Solar charger stops due to low battery..

Cause: Solar charger stops due to low battery.

How to fix it

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

Source: Axpert-3KP-5KP-24V_manual.pdf, p.27

InfiniSolar WP LV 12KW Premium

InverterWarning

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

What it means

Over temperature — Warning code 12 flashing on the display: Over temperature.

Cause: The temperature is too high inside.

How to fix it

  1. The unit keeps operating.
  2. 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

Overload — Warning code 12 flashing on the display: Overload.

Cause: Load exceeds rating value.

How to fix it

  1. The unit keeps operating.
  2. 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

Galleon One 5KL 48V

upsWarning

What it means

EPO activated — Warning code 12 flashing on the display: EPO activated.

Cause: EPO activated.

How to fix it

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

Source: GalleonOne-5KL-48V-manual.pdf, p.22

Frequently asked questions

What does error W12 mean on a Voltronic inverter?
It depends on the model — 8 devices use code W12. On the Axpert 3KP/5KP 24V it means: Solar charger stops due to low battery. The card for each model on this page gives its exact meaning and fix.
Is error W12 a fault or a warning?
W12 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 W12?
The unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the Axpert 3KP/5KP 24V

All Axpert 3KP/5KP 24V codes

Other codes on the InfiniSolar WP LV 12KW Premium

All InfiniSolar WP LV 12KW Premium codes All InfiniSolar 10KW codes All InfiniSolar 15KW codes All InfiniSolar Super 4KW codes All InfiniSolar Plus 5KW codes

Other codes on the InfiniSolar TX-PA 30KW

All InfiniSolar TX-PA 30KW codes

Other codes on the Galleon One 5KL 48V

All Galleon One 5KL 48V codes

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