Solar Lattice

Fault codes › SMA › Sunny Island 4548-US / 6048-US

SMA SI-US W945

Code: W945
Shown as: Warning via SiCom: error in the battery
Vendor severity: 1
Page: 219
ID: fc:sma-sunny-island-us-w945
IRI: https://solarlattice.org/kb/fc/sma-sunny-island-us-w945
Status: active
Also known as: W945, w945, SMA W945, Warning via SiCom: error in the battery
Category: Inverters

Class warning drafted · lead

Production not stated

Clears not stated

Decoded

Reports battery error reported.

What can be behind Battery error reported

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

Battery state-of-charge estimation drift drafted · lead
Battery thermal management failure drafted · lead

Defined in

SI4548-6048-US-BE-en-21W — SMA · page 219 drafted · lead
- tbl=156.r12 h=0690c4cd2d74

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

Claims

`defined_in`

c1 drafted · lead SI4548-6048-US-BE-en-21W

SI4548-6048-US-BE-en-21W tbl=156.r12 h=0690c4cd2d74

`has_event_class`

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

from the Type column

SI4548-6048-US-BE-en-21W tbl=156.r12 h=0690c4cd2d74

`reports`

c3 verified · fact Battery error reported

SI4548-6048-US-BE-en-21W tbl=156.r12 h=0690c4cd2d74

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

`applies_to`

c4 drafted · lead Sunny Island 4548-US / 6048-US

SI4548-6048-US-BE-en-21W tbl=156.r12 h=0690c4cd2d74

Data