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Huawei SUN2000-100KTL-USH0 2012

Code
2012
Shown as
String current backfeed
Vendor severity
Warning
Page
118
ID
fc:huawei-sun2000-100ktl-ush0-2012
IRI
https://solarlattice.org/kb/fc/huawei-sun2000-100ktl-ush0-2012
Status
active
Also known as
2012, Huawei 2012, String current backfeed
Category
Inverters
Class warning drafted · lead
Production reduced verified · fact
Clears not stated

Decoded

Reports string reverse current; look at PV array; do: string configuration correction.

What can be behind String reverse current

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

Defined in

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 E084, ABB / FIMER PVS-60-TL E084, ABB / FIMER UNO-DM-3.3-5.0-PLUS E084, ABB / FIMER UNO-DM-6.0-PLUS E084
CPS
CPS SCA50-100K-T Fault2000-2150, CPS SCA50-100K-T Fault3000-3070
SMA
SMA SBSE-US-50 4013, SMA SBSE-US-50 4014, SMA SBSE-US-50 4015, SMA SBSE-US-50 4016, SMA SBSE-US-50 4017, SMA SC-CP-XT 4003, SMA SC-CP-XT 7901
Sungrow
Sungrow SG200HX 1548-1579, Sungrow SG250HX 1548-1579, Sungrow SG350HX 1548-1579

Claims

defined_in

c1 drafted · lead Huawei SUN2000-100KTL-USH0 User Manual

has_event_class

c2 drafted · lead Warning (device continues, a condition is flagged)

from the Type column

reports

c3 drafted · lead String reverse current

review note: support check: partial - The alarm is named String current backfeed, which is close to reverse current, but the passages are truncated.

affects

c4 drafted · lead PV array

mitigated_by

c5 drafted · lead String configuration correction

Applies when the string has fewer series modules than other strings.

has_production_effect

c6 verified · fact Derate (output reduced or limited)

verified by: review-workflowverified on: 2026-10-23

applies_to

c7 drafted · lead Huawei SUN2000-100KTL-USH0

Data