Solar Lattice

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

SMA SI-US W203

Code
W203
Vendor severity
1
Page
211
ID
fc:sma-sunny-island-us-w203
IRI
https://solarlattice.org/kb/fc/sma-sunny-island-us-w203
Status
active
Also known as
W203, w203, SMA W203
Category
Inverters
Class warning drafted · lead
Production not stated
Clears not stated

Decoded

Reports battery voltage out of range.

What can be behind Battery voltage out of range

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

SMA
SMA SI-US F201, SMA SI-US F716, SMA SI-US W202, SMA SI-US W204, SMA SI-US W717, SMA SI-US W718, SMA SI-US W719
Solis
Solis S6-EH2P OV-Vbatt, Solis S6-EH2P UN-Vbatt, Solis S6-EH3P30-60K OV-Vbatt, Solis S6-EH3P30-60K UN-Vbatt, Solis S6-EH3P75-150K OV-Vbatt, Solis S6-EH3P75-150K UN-Vbatt

Claims

defined_in

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

has_event_class

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

from the Type column

reports

c3 verified · fact Battery voltage out of range

Reported for slave 2

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

applies_to

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

Data