Solar Lattice

Fault codes › SMA › Sunny Boy 3.0-7.7-US (SBx.x-1SP-US-41)

SMA SB-US-41 3303

Code: 3303
Shown as: Unstable operation
Page: 56
ID: fc:sma-sb-us-41-3303
IRI: https://solarlattice.org/kb/fc/sma-sb-us-41-3303
Status: active
Also known as: 3303, SMA 3303, Unstable operation
Category: Inverters

Class fault drafted · lead

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

SBxx-US-1XP-41-BA-en-12 — SMA · page 56 drafted · lead
- sec=6.2.19 h=e3d28fa695a1
- sec=h260 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 3901, SMA SB-US-41 3902, SMA SB-US-41 9005, SMA SBSE-US-50 29254, SMA SBSE-US-50 3302, 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

Claims

`defined_in`

c1 drafted · lead SBxx-US-1XP-41-BA-en-12

SBxx-US-1XP-41-BA-en-12 sec=6.2.19 h=e3d28fa695a1
SBxx-US-1XP-41-BA-en-12 sec=h260 h=86ef2a663376

`reports`

c2 drafted · lead Insufficient DC input power

STPTL-US-10-IA-xx-22 sec=h187 h=ce98c4366db9
SBxx-US-1XP-41-BA-en-12 sec=h261 h=bf9b5386b1d8
SBSExx-US-50-BE-en-11 sec=h529 h=bf9b5386b1d8

c3 drafted · lead Insufficient solar irradiance

STPTL-US-10-IA-xx-22 sec=h187 h=ce98c4366db9

`affects`

c4 drafted · lead PV array

STPTL-US-10-IA-xx-22 sec=h187 h=ce98c4366db9
STPTL-US-10-IA-xx-22 sec=h188 h=1f65f4b4019b
SBxx-US-1XP-41-BA-en-12 sec=h262 h=85a79abe467c
SBSExx-US-50-BE-en-11 sec=h530 h=2f4e68d48aa0

`has_event_class`

c5 drafted · lead Fault (device stops or needs intervention)

STPTL-US-10-IA-xx-22 sec=h187 h=ce98c4366db9

review 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=h187 h=ce98c4366db9
SBxx-US-1XP-41-BA-en-12 sec=h261 h=bf9b5386b1d8
SBSExx-US-50-BE-en-11 sec=h529 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=h188 h=1f65f4b4019b

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

`mitigated_by`

c8 verified · fact String configuration correction

Only when the message recurs frequently

STPTL-US-10-IA-xx-22 sec=h188 h=1f65f4b4019b
SBxx-US-1XP-41-BA-en-12 sec=h262 h=85a79abe467c
SBSExx-US-50-BE-en-11 sec=h530 h=2f4e68d48aa0

verified by: review-workflowverified on: 2026-10-23review note: support check: partial - Passages say to ensure the PV array is correctly rated and wired if the message is frequent, but do not…

`applies_to`

c9 drafted · lead Sunny Boy 3.0-7.7-US-41 proposed

SBxx-US-1XP-41-BA-en-12 sec=6.2.19 h=e3d28fa695a1
SBxx-US-1XP-41-BA-en-12 sec=h260 h=86ef2a663376

Data