Solar Lattice

Fault codes › SMA › Sunny Boy Smart Energy 3.8-11.5-US (SBSEx.x-US-50)

SMA SBSE-US-50 3302

Code: 3302
Shown as: Unstable operation
Page: 103
ID: fc:sma-sbse-us-50-3302
IRI: https://solarlattice.org/kb/fc/sma-sbse-us-50-3302
Status: active
Also known as: 3302, SMA 3302, Unstable operation
Category: Inverters

Class fault verified · fact

Production stops drafted · lead

Clears by itself drafted · lead

Decoded

Reports insufficient DC input power, insufficient solar irradiance; look at PV array; do: string configuration correction.

What can be behind Insufficient DC input power

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

What can be behind Insufficient solar irradiance

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

Defined in

SBSExx-US-50-BE-en-11 — SMA · page 103 drafted · lead
- sec=11.1.21 h=cc893b83adf1
- sec=h523 h=86ef2a663376

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 E017, ABB / FIMER PVS-166-175-TL W001, ABB / FIMER PVS-166-175-TL W002, ABB / FIMER PVS-60-TL E017, ABB / FIMER PVS-60-TL W001, ABB / FIMER PVS-60-TL W002, ABB / FIMER TRIO-20.0-27.6-TL E017, ABB / FIMER TRIO-20.0-27.6-TL W001, ABB / FIMER TRIO-20.0-27.6-TL W002, ABB / FIMER UNO-DM-3.3-5.0-PLUS E017, ABB / FIMER UNO-DM-3.3-5.0-PLUS W001, ABB / FIMER UNO-DM-3.3-5.0-PLUS W002, ABB / FIMER UNO-DM-6.0-PLUS E017, ABB / FIMER UNO-DM-6.0-PLUS W001, ABB / FIMER UNO-DM-6.0-PLUS W002
Fronius: Fronius Galvo 306, Fronius Symo 306
SMA: SMA SB-US-40 3301-3303, SMA SB-US-40 3901-3902, SMA SB-US-40 9005, SMA SB-US-41 3301, SMA SB-US-41 3303, SMA SB-US-41 3901, SMA SB-US-41 3902, SMA SB-US-41 9005, SMA SBSE-US-50 29254, SMA SBSE-US-50 3303, SMA SBSE-US-50 3901, SMA SBSE-US-50 3902, SMA CORE1-US 9005, SMA STP-TL-US 3301, SMA STP-TL-US 3302, SMA STP-TL-US 3303, SMA STP-TL-US 3901-3902, SMA STP-TL-US 9005, SMA STP-X-US 3901, SMA STP-X-US 3902
Schneider Electric: Schneider Electric CL125 075
Yaskawa Solectria: Yaskawa Solectria SGI-XTM DC Volt Low, Yaskawa Solectria SGI-XTM Low DC Power

Same code in other families

SMA STP-TL-US 3302

Claims

`defined_in`

c1 drafted · lead SBSExx-US-50-BE-en-11

SBSExx-US-50-BE-en-11 sec=11.1.21 h=cc893b83adf1
SBSExx-US-50-BE-en-11 sec=h523 h=86ef2a663376

`reports`

c2 drafted · lead Insufficient DC input power

STPTL-US-10-IA-xx-22 sec=h184 h=ece357161bcb
SBSExx-US-50-BE-en-11 sec=h524 h=bf9b5386b1d8

c3 drafted · lead Insufficient solar irradiance

STPTL-US-10-IA-xx-22 sec=h184 h=ece357161bcb

`affects`

c4 drafted · lead PV array

STPTL-US-10-IA-xx-22 sec=h184 h=ece357161bcb
STPTL-US-10-IA-xx-22 sec=h185 h=4ab884337c82
SBSExx-US-50-BE-en-11 sec=h525 h=2f4e68d48aa0

`has_event_class`

c5 verified · fact Fault (device stops or needs intervention)

STPTL-US-10-IA-xx-22 sec=h184 h=ece357161bcb

verified by: review-workflowverified on: 2026-10-23review note: support check: partial - Feed-in is interrupted, but fault versus warning is not stated.

`has_production_effect`

c6 drafted · lead Trip (production stops)

STPTL-US-10-IA-xx-22 sec=h184 h=ece357161bcb
SBSExx-US-50-BE-en-11 sec=h524 h=bf9b5386b1d8

`has_recovery`

c7 drafted · lead Auto-reset (clears by itself)

Resumes when irradiation rises; if frequent, check array sizing and wiring

STPTL-US-10-IA-xx-22 sec=h185 h=4ab884337c82

review note: support check: partial - Waiting for irradiation to increase implies auto-resume but is not explicit.

`mitigated_by`

c8 drafted · lead String configuration correction

Only when the message recurs frequently

STPTL-US-10-IA-xx-22 sec=h185 h=4ab884337c82
SBSExx-US-50-BE-en-11 sec=h525 h=2f4e68d48aa0

`applies_to`

c9 drafted · lead Sunny Boy Smart Energy US-50

SBSExx-US-50-BE-en-11 sec=11.1.21 h=cc893b83adf1
SBSExx-US-50-BE-en-11 sec=h523 h=86ef2a663376

Data