What does error W05 mean on a DEYE inverter?

It depends on the model — 4 devices use code W05. On the SUN G01P3-EU-BM8 Series it means: Upgrade error warning. The card for each model on this page gives its exact meaning and fix.

Is error W05 a fault or a warning?

W05 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 W05?

Upgrade to the correct firmware. The exact steps for each affected model are listed on this page.

W05

DEYE inverter error W05

Upgrade error warning

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

The exact meaning depends on your model:

SUN G01P3-EU-BM8 Series

InverterWarning

Also applies to:SUN-120K-G01P3-EU-BM8SUN-125K-G01P3-EU-BM8SUN-130K-G01P3-EU-BM8SUN-135K-G01P3-EU-BM8SUN-136K-G01P3-EU-BM8SUN-60K-G03SUN-70K-G03SUN-75K-G03+12

What it means

Upgrade error warning — The firmware was upgraded incorrectly.

Cause: The firmware was upgraded incorrectly (a wrong or failed firmware package was loaded).

How to fix it

Upgrade to the correct firmware.

Source: 041_BManual_SUN-120_125_130_135_136K-G01P3-EU-BM8_20251021_en_a2166559.pdf, p.60 · 033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf, p.59 · 042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf, p.59 · +2 more official manuals

SUN G04/G05/G06 3-Phase

InverterWarning

Also applies to:SUN-6K-G06-LV-P1SUN-8K-G06-LV-P1SUN-6K-G06P3-EU-BM2-LV-P1SUN-8K-G06P3-EU-BM2-LV-P1SUN-10K-G05-LVSUN-12K-G05-LVSUN-15K-G05-LVSUN-15K-G06P3-EU-BM2-P1+27

What it means

Upgrade error warning — Firmware upgrade error warning.

Cause: The firmware was upgraded incorrectly.

How to fix it

Upgrade to the correct firmware.

Source: 063_BManual_SUN-6K-G06-LV-P1_20250923_en_30a96699.pdf, p.56

SUN SG01HP3/SG02HP3 Hybrid

InverterWarning

Also applies to:SUN-5K-SG01HP3-EU-AM2SUN-6K-SG01HP3-EU-AM2SUN-8K-SG01HP3-EU-AM2SUN-10K-SG01HP3-EU-AM2SUN-12K-SG01HP3-EU-AM2SUN-15K-SG01HP3-EU-AM2SUN-20K-SG01HP3-EU-AM2SUN-25K-SG01HP3-EU-AM2+9

What it means

CT Wrong Direction Warning — CT_WRONG_direction_warn - a current transformer (CT) is installed in the wrong direction or location.

Cause: The arrow on the CT case does not point toward the inverter, or the CTs are installed in the wrong location.

How to fix it

Check whether the arrow on the CT case points to the inverter, and check that the installation locations of the CTs are correct.

Source: 037_BManual_SUN-5_6_8_10_12_15_20_25K-SG01HP3-EU-AM2_20260224_en_9ef2717c.pdf, p.48 · 050_BManual_SUN-29.9_30_35_40_50K-SG01HP3-EU-BM3_4_20260224_en_544e1b2f.pdf, p.49 · 062_BManual__SUN-60_70_75_80K-SG02HP3-EU-EM6_20260224_en_38cbc9f6.pdf, p.49

Frequently asked questions

What does error W05 mean on a DEYE inverter?: It depends on the model — 4 devices use code W05. On the SUN G01P3-EU-BM8 Series it means: Upgrade error warning. The card for each model on this page gives its exact meaning and fix.
Is error W05 a fault or a warning?: W05 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 W05?: Upgrade to the correct firmware. The exact steps for each affected model are listed on this page.

Related error codes

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

SUN G01P3-EU-BM8 Series

What it means

How to fix it

SUN G04/G05/G06 3-Phase

What it means

How to fix it

SUN SG01HP3/SG02HP3 Hybrid

What it means

How to fix it

Frequently asked questions

Related error codes

Other codes on the SUN G01P3-EU-BM8 Series

Other codes on the SUN G04/G05/G06 3-Phase

Other codes on the SUN SG01HP3/SG02HP3 Hybrid