c1 drafted · lead SBSExx-US-50-BE-en-11
- SBSExx-US-50-BE-en-11
sec=11.1.28h=49d487e1f0cf - SBSExx-US-50-BE-en-11
sec=h558h=292e6cb83a1a
Fault codes › SMA › Sunny Boy Smart Energy 3.8-11.5-US (SBSEx.x-US-50)
SMA SBSE-US-50 3501
Clears
not stated
Decoded
Reports ground fault alarm or trip, low insulation resistance; may indicate loss of electrical insulation; look at PV array, DC cable, DC connector; confirm with insulation resistance testing, open-circuit voltage measurement, DC voltage measurement, visual inspection, infrared thermography; do: DC wiring check.
What can be behind Ground fault alarm or trip
Failure modes that present as the reported condition, and the tests that tell them apart.
- Backsheet Cracking drafted · lead
- Cable Defect verified · fact
- Connector Defect drafted · lead
- Glass Breakage drafted · lead
- Grounding fuse failure verified · fact
- Loss of electrical insulation drafted · lead
What can be behind Low insulation resistance
Failure modes that present as the reported condition, and the tests that tell them apart.
Defined in
- SBSExx-US-50-BE-en-11 — SMA drafted · lead
sec=11.1.28h=49d487e1f0cfsec=h558h=292e6cb83a1a
- Event 3501 with Sunny Boy Smart Energy SBSE-US-50 — SMA drafted · lead
sec=h1h=05d7bba15124
The manufacturer's own cause and corrective text is not reproduced here.
Same condition on other equipment
Same code in other families
- SMA SB-US-40 3501
- SMA SB-US-41 3501
- SMA PEAK3-US 3501
- SMA CORE1-US 3501
- SMA STP-TL-US 3501
- SMA STP-X-US 3501
- SMA SC-CP-XT 3501
Claims
defined_in
c2 drafted · lead Event 3501 with Sunny Boy Smart Energy SBSE-US-50
- Event 3501 with Sunny Boy Smart Energy SBSE-US-50
sec=h1h=05d7bba15124
reports
c3 drafted · lead Ground fault alarm or trip
- SBxx-US-1XP-40-BA-en-13
sec=h204h=90a2ed93d28f - STPTL-US-10-IA-xx-22
tbl=15.r3h=37b0c92512b9 - SBxx-US-1XP-41-BA-en-12
sec=h277h=aa84d8588c73 - SBSExx-US-50-BE-en-11
sec=h559h=b4a70384c4fe - SHPxxx-US-21-BE-en-11
sec=h320h=aa84d8588c73
c4 drafted · lead Low insulation resistance
- SCCPXT-E7-WA-en-37
tbl=35.r1h=82dbfd767650 - STPxx-US-50-BE-en-14
sec=h453h=ff98adfd21c5
indicates
c5 drafted · lead Loss of electrical insulation
Defective insulation or faulty plug connections are named as the frequent cause.
- STPxx-US-50-BE-en-14
sec=h453h=ff98adfd21c5
affects
- SBxx-US-1XP-40-BA-en-13
sec=h204h=90a2ed93d28f - STPTL-US-10-IA-xx-22
tbl=15.r3h=37b0c92512b9 - SCCPXT-E7-WA-en-37
tbl=35.r1h=82dbfd767650
- SBSExx-US-50-BE-en-11
sec=h560h=8ca40d7d772c - STPxx-US-50-BE-en-14
sec=h453h=ff98adfd21c5
c8 drafted · lead DC connector
- STPxx-US-50-BE-en-14
sec=h453h=ff98adfd21c5 - STPxx-US-50-BE-en-14
sec=h454h=736fbc74e526
detected_by
c9 drafted · lead Insulation resistance testing
- STPxx-US-50-BE-en-14
sec=h454h=736fbc74e526
c10 drafted · lead Open-circuit voltage measurement
- STPxx-US-50-BE-en-14
sec=h454h=736fbc74e526
review note: support check: partial - Open-circuit voltage measurement is listed as a verification step, but not explicitly as detection of this fault.
c11 drafted · lead DC voltage measurement
String pole-to-ground voltage measurement.
- STPxx-US-50-BE-en-14
sec=h454h=736fbc74e526
c12 drafted · lead Visual inspection
- SBSExx-US-50-BE-en-11
sec=h560h=8ca40d7d772c - STPxx-US-50-BE-en-14
sec=h454h=736fbc74e526
c13 drafted · lead Infrared thermography
- STPxx-US-50-BE-en-14
sec=h454h=736fbc74e526
review note: support check: partial - IR camera is only a tip for support, not a stated detection method.
mitigated_by
c14 drafted · lead DC wiring check
- STP33-62-US-41-BA-en-13
sec=h262h=e4a2a2e70403 - STP33-62-US-41 ops manual
sec=h179h=e4a2a2e70403 - SBxx-US-1XP-40-BA-en-13
sec=h205h=7f7d30d371d5 - SBxx-US-1XP-41-BA-en-12
sec=h278h=3450f514b95f - SBSExx-US-50-BE-en-11
sec=h560h=8ca40d7d772c - SHPxxx-US-21-BE-en-11
sec=h321h=3450f514b95f
has_event_class
c15 verified · fact Fault (device stops or needs intervention)
- STPxx-US-50-BE-en-14
sec=h453h=ff98adfd21c5 - Event 3501 with Sunny Boy Smart Energy SBSE-US-50
sec=h1h=05d7bba15124
verified by: review-workflowverified on: 2026-10-23review note: support check: partial - Inverter disconnects/does not operate, but 'Fault' classification isn't explicitly stated.
has_production_effect
c16 drafted · lead Trip (production stops)
Inverter disconnects from grid or fails to connect during self-test.
- STPxx-US-50-BE-en-14
sec=h453h=ff98adfd21c5 - Event 3501 with Sunny Boy Smart Energy SBSE-US-50
sec=h1h=05d7bba15124
applies_to
c17 drafted · lead Sunny Boy Smart Energy US-50
- SBSExx-US-50-BE-en-11
sec=11.1.28h=49d487e1f0cf - SBSExx-US-50-BE-en-11
sec=h558h=292e6cb83a1a - Event 3501 with Sunny Boy Smart Energy SBSE-US-50
sec=h1h=05d7bba15124