Is error W04 a fault or a warning?

W04 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.

W04

DEYE inverter error W04

Meter Offline Warning

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

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

Meter Offline Warning — Meter_offline_warn - meter communication failure.

Cause: Communication between the inverter and the external energy meter has been lost, or the meter wiring is abnormal.

How to fix it

Check whether the meter has successful communication and whether the wiring is normal.

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 W04 mean on a DEYE inverter?: W04 means: Meter Offline Warning. Communication between the inverter and the external energy meter has been lost, or the meter wiring is abnormal.
Is error W04 a fault or a warning?: W04 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 W04?: Check whether the meter has successful communication and whether the wiring is normal.

Related error codes

Other codes on the SUN SG01HP3/SG02HP3 Hybrid

All SUN SG01HP3/SG02HP3 Hybrid codes

Prefer the full written guide? Read the complete DEYE inverter error-code guide

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