What does error 04 mean on a DEYE inverter?

It depends on the model — 10 devices use code 04. On the SUN G01P3-EU-BM8 Series it means: Ground fault GFDI. The card for each model on this page gives its exact meaning and fix.

How do I clear or fix error 04?

Check the solar panel output connection. The exact steps for each affected model are listed on this page.

DEYE inverter error 04 (F004)

Ground fault GFDI

Also displayed as F004 / F04 on some models.

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

The exact meaning depends on your model:

SUN G01P3-EU-BM8 Series

InverterFault

Also applies to:SUN-120K-G01P3-EU-BM8SUN-125K-G01P3-EU-BM8SUN-130K-G01P3-EU-BM8SUN-135K-G01P3-EU-BM8SUN-136K-G01P3-EU-BM8SUN-7K-G02P1-EU-AM2SUN-7.5K-G02P1-EU-AM2SUN-8K-G02P1-EU-AM2+18

What it means

Ground fault GFDI — The ground-fault detector/interrupter (GFDI) has detected a ground fault on the PV side.

Cause: A PV output conductor is faulted to ground, tripping the GFDI protection.

How to fix it

Check the solar panel output connection.

Source: 041_BManual_SUN-120_125_130_135_136K-G01P3-EU-BM8_20251021_en_a2166559.pdf, p.61 · 065_BManual_SUN-7_7.5_8K-G02P1-EU-AM2_20260625_en_4466f08b.pdf, p.50 · 032_BManual_SUN-9_10_10.5K-G02P1-EU-AM2_20260625_en_df0f2106.pdf, p.50 · +4 more official manuals

SUN G04/G05/G06 3-Phase

InverterFault

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+71

What it means

Ground fault GFDI — The ground-fault detector/interrupter (GFDI) detected a ground fault on the PV output.

Cause: A PV output conductor is leaking or shorted to ground, tripping the GFDI protection.

How to fix it

Check the solar panel output connection.

Source: 063_BManual_SUN-6K-G06-LV-P1_20250923_en_30a96699.pdf, p.56 · 031_BManual_SUN-1_1.5_2_2.2_2.5_2.7_3_3.3_3.6_4K-G04P1-EU-AM1_20260624_en_15adc00c.pdf, p.52 · 036_BManual_SUN-3_4_5_6_7_8_9_10_12_15K-G06P3-EU-BM2_20250506_en_0eb78440.pdf, p.56

SUN SG01HP3/SG02HP3 Hybrid

InverterFault

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

GFDI Ground Failure — GFDI_Ground_Failure - grounding fault detected by the ground fault detector/interrupter.

Cause: The PV array is not grounded.

How to fix it

Check whether the PV is grounded.

Source: 037_BManual_SUN-5_6_8_10_12_15_20_25K-SG01HP3-EU-AM2_20260224_en_9ef2717c.pdf, p.49 · 050_BManual_SUN-29.9_30_35_40_50K-SG01HP3-EU-BM3_4_20260224_en_544e1b2f.pdf, p.50 · 062_BManual__SUN-60_70_75_80K-SG02HP3-EU-EM6_20260224_en_38cbc9f6.pdf, p.50

RW Spring Series Battery

BatteryFault

Also applies to:RW-L2.5ARW-L5.1RW-L10.2RW-F16SE-F5SE-F5 PlusSE-F5 ProSE-F12+7

What it means

Ultimate_Protection — Ultimate protection - the BMS's last-resort protection tripped after a critical limit was exceeded beyond the normal recoverable protection levels.

Cause: A critical parameter (voltage, current, or temperature) passed the final protection threshold, beyond the point where the normal protections can recover automatically.

How to fix it

Switch the battery off and disconnect it; do not keep operating it.
Contact Deye support before returning the battery to service.

Source: 093_Deye_RW-L2.5A_User_Manual_EN_89188fb8.pdf, p.10 · 019_Download_4a609b7e.pdf, p.10 · 021_Download_f81ba1e7.pdf, p.10 · +6 more official manuals

GB-A HV Battery

BatteryFault

Also applies to:GB-A

What it means

ALARM_ID_DSG_OVER_TEMP_LEV_2 — Discharging temperature is too high.

Cause: Cell temperature exceeded the discharging over-temperature limit - high load current, high ambient temperature, or poor ventilation.

How to fix it

Reduce the load and let the battery cool; improve ventilation before resuming operation.

Source: 008_deye_ess_user_manual_gb_a_jpnen_v02_20250829_3fea617e.pdf, p.12

Frequently asked questions

What does error 04 mean on a DEYE inverter?: It depends on the model — 10 devices use code 04. On the SUN G01P3-EU-BM8 Series it means: Ground fault GFDI. The card for each model on this page gives its exact meaning and fix.
Is error 04 a fault or a warning?: 04 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 04?: Check the solar panel output connection. 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

RW Spring Series Battery

What it means

How to fix it

GB-A HV Battery

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

Other codes on the RW Spring Series Battery

Other codes on the GB-A HV Battery