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Fault codes › Sungrow › Sungrow SG250HX

Sungrow SG250HX 12

Code: 12
Shown as: Excess Leakage Current
Page: 91
ID: fc:sungrow-sg250hx-12
IRI: https://solarlattice.org/kb/fc/sungrow-sg250hx-12
Status: active
Also known as: 12, Sungrow 12, Excess Leakage Current
Category: Inverters

Class fault verified · fact

Production stops drafted · lead

Clears by itself drafted · lead

Decoded

Reports high leakage current; look at AC cable, DC cable; confirm with insulation resistance testing.

What can be behind High leakage current

Failure modes that present as the reported condition, and the tests that tell them apart.

Defined in

SG250HX-US-UEN-Ver17-202203 — Sungrow · 17 · page 91 drafted · lead
- tbl=39.r4 h=8b79a5df44df

The manufacturer's own cause and corrective text is not reproduced here.

Same condition on other equipment

ABB / FIMER: ABB / FIMER PVS-166-175-TL E018, ABB / FIMER PVS-60-TL E018, ABB / FIMER TRIO-20.0-27.6-TL E018, ABB / FIMER UNO-DM-3.3-5.0-PLUS E018, ABB / FIMER UNO-DM-6.0-PLUS E018
CPS: CPS SCA25KTL-208 Fault0090, CPS SCA25KTL-208 GFCIErr, CPS SCA25KTL-480 Fault0090, CPS SCA25KTL-480 GFCIErr, CPS SCA50-100K-T Protect0650, CPS SCH100-125KTL Fault0090, CPS SCH100-125KTL GFCIErr, CPS SCH125KTL-AIO Fault0090, CPS SCH125KTL-AIO GFCIErr, CPS SCH200-250K-T Fault0650, CPS SCH200-250K-T GFCIErr, CPS SCH275KTL Fault0090, CPS SCH275KTL GFCIErr, CPS SCH350KTL Fault0090, CPS SCH350KTL GFCIErr
Canadian Solar: Canadian Solar 185-255K ILeak-PRO 01/02/03/04, Canadian Solar 23-28KTL-CT GFCIErr
Huawei: Huawei SUN2000-100KTL-USH0 2051, Huawei SUN2000-25-30KTL-US 318, Huawei SUN2000-45KTL-US-HV-D0 318
KACO new energy: KACO new energy blueplanet TL3 18, KACO new energy blueplanet TL3 78
SMA: SMA SB-US-40 3601, SMA SB-US-41 3601, SMA SBSE-US-50 3601, SMA PEAK3-US 3601, SMA STP-TL-US 3601, SMA STP-X-US 3601, SMA SC-CP-XT 3601
Schneider Electric: Schneider Electric CL125 012, Schneider Electric CL125 056
Solis: Solis 3P-5G-US ILeak-PRO 01/02/03/04, Solis RHI-1P-HV ILeak-PRO 01/02/03/04, Solis S6-EH1P ILeak-PRO 01/02/03/04, Solis S6-EH2P ILeak-PRO01, Solis S6-EH2P ILeak-PRO02, Solis S6-EH2P ILeak-PRO03, Solis S6-EH2P ILeak-PRO04, Solis S6-EH3P30-60K ILeak-PRO01, Solis S6-EH3P30-60K ILeak-PRO02, Solis S6-EH3P30-60K ILeak-PRO03, Solis S6-EH3P30-60K ILeak-PRO04, Solis S6-EH3P75-150K ILeak-PRO01, Solis S6-EH3P75-150K ILeak-PRO02, Solis S6-EH3P75-150K ILeak-PRO03, Solis S6-EH3P75-150K ILeak-PRO04, Solis S6-GC ILeak-PRO, Solis S6-GU ILeak-PRO
Sungrow: Sungrow SG-CX-US 012, Sungrow SG200HX 012, Sungrow SG350HX 012
Yaskawa Solectria: Yaskawa Solectria PVI-14-20TL GFCI.Err, Yaskawa Solectria PVI-25TL-R Fault0090, Yaskawa Solectria PVI-25TL-R GFCI.Err, Yaskawa Solectria PVI-TL GFCI.Err, Yaskawa Solectria SGI-XTM RCM Warn

Same code in other families

Claims

`defined_in`

c1 drafted · lead SG250HX-US-UEN-Ver17-202203

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df

`reports`

c2 verified · fact High leakage current

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df
Sungrow 36 60CX-US IOM tbl=48.r5 h=843ebdc64972

verified by: review-workflowverified on: 2026-10-20

`has_event_class`

c3 verified · fact Fault (device stops or needs intervention)

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df
SG250HX-US-UEN-Ver17-202203 sec=9.1 h=7e543aeb5157

verified by: review-workflowverified on: 2026-10-20review note: support check: partial - The passages show it is a listed fault code in the troubleshooting table, but they give no explicit fault classification.

`has_production_effect`

c4 drafted · lead Trip (production stops)

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df
Sungrow 36 60CX-US IOM tbl=48.r5 h=843ebdc64972

review note: support check: partial - Reconnection after the environment improves implies disconnection, but the passages don't explicitly state a trip.

`has_recovery`

c5 drafted · lead Auto-reset (clears by itself)

Reconnects when damp or low-light conditions improve; otherwise check cable insulation, then service.

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df
Sungrow 36 60CX-US IOM tbl=48.r5 h=843ebdc64972

`detected_by`

c6 drafted · lead Insulation resistance testing

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df
Sungrow 36 60CX-US IOM tbl=48.r5 h=843ebdc64972

review note: support check: partial - The passages say to check that the AC and DC cables are well insulated, but they don't mention insulation resistance testing.

`affects`

c7 drafted · lead AC cable

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df
Sungrow 36 60CX-US IOM tbl=48.r5 h=843ebdc64972

review note: support check: partial - The passages say to check that the AC cables are well insulated, but not that the fault affects the AC cable.

c8 drafted · lead DC cable

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df
Sungrow 36 60CX-US IOM tbl=48.r5 h=843ebdc64972

review note: support check: partial - The passages say to check that the DC cables are well insulated, but not that the fault affects the DC cable.

`applies_to`

c9 drafted · lead Sungrow SG250HX-US

SG250HX-US-UEN-Ver17-202203 tbl=39.r4 h=8b79a5df44df

Data