Also applies to:SUN-120K-G01P3-EU-BM8SUN-125K-G01P3-EU-BM8SUN-130K-G01P3-EU-BM8SUN-135K-G01P3-EU-BM8SUN-136K-G01P3-EU-BM8
What it means
GFCI(RCD) Ac leakage current fault — The GFCI/RCD stage measured an average AC leakage current above 300 mA.
Cause: The average AC leakage current measured by the GFCI/RCD stage exceeds 300 mA, from a real leakage path on the DC supply or solar panels or from a faulty leakage current sensor or its circuit.
How to fix it
- 1Check whether the DC power supply and the solar panels are OK, then check that the 'Test data' -> 'diL' value is about 40, then check the leakage current sensor and its circuit (viewing test data requires the big LCD)
- 2Restart the inverter; if the error still exists, contact your installer or Deye service.
Source: 041_BManual_SUN-120_125_130_135_136K-G01P3-EU-BM8_20251021_en_a2166559.pdf, p.61
Also applies to:SUN-7K-G02P1-EU-AM2SUN-7.5K-G02P1-EU-AM2SUN-8K-G02P1-EU-AM2SUN-9K-G02P1-EU-AM2SUN-10K-G02P1-EU-AM2SUN-10.5K-G02P1-EU-AM2
What it means
GFCI(RCD) Ac leakage current fault — The GFCI/RCD stage measured an average AC leakage current above the protection threshold.
Cause: The average AC leakage current measured by the GFCI/RCD stage exceeds the protection threshold, from a real leakage path on the DC supply or solar panels or from a faulty leakage current sensor or its circuit.
How to fix it
- 1Check whether the DC power supply and the solar panels are OK, then check the 'Test data' -> 'diL' value, then check the leakage current sensor and its circuit (viewing test data requires the big LCD)
- 2Restart the inverter; if the error still exists, contact your installer or Deye service.
Source: 065_BManual_SUN-7_7.5_8K-G02P1-EU-AM2_20260625_en_4466f08b.pdf, p.51 · 032_BManual_SUN-9_10_10.5K-G02P1-EU-AM2_20260625_en_df0f2106.pdf, p.51
Also applies to:SUN-60K-G03SUN-70K-G03SUN-75K-G03SUN-80K-G03SUN-90K-G03SUN-100K-G03SUN-110K-G03SUN-60K-G01P3-EU-AM8-LV+7
What it means
GFCI(RCD) Ac leakage current fault — The GFCI/RCD stage measured an average AC leakage current above 300 mA.
Cause: The average AC leakage current measured by the GFCI/RCD stage exceeds 300 mA, from a real leakage path on the DC supply or solar panels or from a faulty leakage current sensor or its circuit.
How to fix it
- 1Check whether the DC power supply and the solar panels are OK, then check that the 'Test data' -> 'diL' value is about 40, then check the leakage current sensor and its circuit (viewing test data requires the big LCD)
- 2Restart the inverter; if the error still exists, contact your installer.
Source: 033_BManual_SUN-70_75_80_90_100_110K-G03_20260702_en_a9db1e1b.pdf, p.60 · 042_BManual_SUN-120_125_130_135_136K-G01P3-EU-AM8_20260702_en_05f936e3.pdf, p.60 · 060_BManual_SUN-60_70_75K-G01P3-EU-AM8-LV_20260701_en_f559aeec.pdf, p.60 · +1 more official manuals
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+48
What it means
GFCI(RCD) AC leakage current fault — The GFCI/RCD function measured continuous (average) leakage current above the limit.
Cause: The average leakage current is over 300 mA, caused by a DC-supply or solar-panel insulation problem, or by a faulty leakage-current sensor or its circuit.
How to fix it
- 1Check whether the DC power supply and solar panels are OK; check the 'Test data' -> 'diL' value (about 40; requires the big LCD); check the leakage-current sensor and its circuit.
- 2Restart the inverter; if the error still exists, contact your installer or Deye service.
Source: 063_BManual_SUN-6K-G06-LV-P1_20250923_en_30a96699.pdf, p.57 · 036_BManual_SUN-3_4_5_6_7_8_9_10_12_15K-G06P3-EU-BM2_20250506_en_0eb78440.pdf, p.56
Also applies to:SUN-1K-G04P1-EU-AM1SUN-1.5K-G04P1-EU-AM1SUN-2K-G04P1-EU-AM1SUN-2.2K-G04P1-EU-AM1SUN-2.5K-G04P1-EU-AM1SUN-2.7K-G04P1-EU-AM1SUN-3K-G04P1-EU-AM1SUN-3.3K-G04P1-EU-AM1+15
What it means
GFCI(RCD) AC leakage current fault — The GFCI/RCD function measured continuous (average) leakage current above the limit.
Cause: The average leakage current exceeded the permanent GFCI/RCD protection limit, caused by a DC-supply or solar-panel insulation problem, or by a faulty leakage-current sensor or its circuit.
How to fix it
- 1Check whether the DC power supply and solar panels are OK; check the 'Test data' -> 'diL' value (requires the big LCD); check the leakage-current sensor and its circuit.
- 2Restart the inverter; if the error still exists, contact your installer or Deye service.
Source: 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.53
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
GFCI Failure (Leakage Current) — GFCI_Failure - leakage (residual) current fault.
Cause: The leakage current to ground exceeded the limit, usually due to a PV-side cable ground connection problem.
How to fix it
- 1Check the PV side cable ground connection
- 2Restart the system 2-3 times.
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
Also applies to:SUN-5K-SG04LP3-EUSUN-6K-SG04LP3-EUSUN-8K-SG04LP3-EUSUN-10K-SG04LP3-EUSUN-12K-SG04LP3-EUSUN-3K-SG05LP3-EU-SM2SUN-4K-SG05LP3-EU-SM2SUN-5K-SG05LP3-EU-SM2+9
What it means
AC Leakage Current Fault — AC leakage current fault - leakage (residual) current fault.
Cause: The leakage current to ground exceeded the limit, usually due to a PV-side cable ground connection problem.
How to fix it
- 1Check the PV side cable ground connection
- 2Restart the system 2-3 times
- 3If the fault still exists, contact us for help.
Source: 038_BManual_SUN-5_6_8_10_12K-SG04LP3-EU_20260319_en_081932c1.pdf, p.46 · 040_BManual_SUN-3_4_5_6_8_10_12K-SG05LP3-EU-SM2_20260319_en_b0183b7d.pdf, p.46 · 044_BManual_SUN-14_15_16_18_20K-SG05LP3-EU-SM2_20260319_en_ac7cdbd1.pdf, p.46
Energy storage systemFault Also applies to:AI-W5.1-5P3-EU-B-ESSAI-W5.1-6P3-EU-B-ESSAI-W5.1-8P3-EU-B-ESSAI-W5.1-10P3-EU-B-ESSAI-W5.1-12P3-EU-B-ESS
What it means
AC leakage current fault — Leakage current fault (GFCI).
Cause: Ground-leakage current exceeded the limit - typically a PV-side cable ground/insulation problem.
How to fix it
- 1Check the PV-side cable ground connection and restart the system 2-3 times.
- 2If the fault still exists, contact Deye for help.
Source: 002_Download_4e90fe7a.pdf, p.46
Energy storage systemFault Also applies to:GB-SL5K-EUGB-SL6K-EUGB-SL8K-EUGB-SL10K-EUGB-SL12K-EUGB-SL15K-EUGB-SL20K-EUGB-SL Pro 5K-EU+6
What it means
GFCI_Failure — Leakage current fault (GFCI).
Cause: Ground-leakage current exceeded the limit - typically a PV-side cable ground/insulation problem.
How to fix it
- 1Check the PV-side cable ground connection and restart the system 2-3 times.
- 2If the fault still exists, contact Deye for help.
Source: 081_deye_gb_sl_pro_user_manual_46fa941a.pdf, p.49 · 010_Download_cc05df18.pdf, p.44
Also applies to:GB-A
What it means
ALARM_ID_SOC_OVER_LEV_2 — High SOC fault.
Cause: The state of charge rose above the allowed upper limit - charging continued past full, usually from wrong charge settings or SOC drift.
How to fix it
- 1Stop charging and let the battery discharge slightly; check the PCS charge cut-off settings.
- 2Contact Deye support if the SOC reading looks wrong.
Source: 008_deye_ess_user_manual_gb_a_jpnen_v02_20250829_3fea617e.pdf, p.13