4 Product Description
SMA America, LLC
18
SB3-5TLUS22-IA-en-10
Installation Manual
The Sunny Boy is a multi-string inverter that has two input areas,
A
and
B
, each of which having its
own MPP tracker. This permanently determines the maximum power point and controls the voltage on
the PV modules accordingly. The two separate MPP trackers make it possible to connect different
PV strings to input areas
A
and
B
. The PV strings may vary in the number of PV modules, their
orientation to the sun and shading.
Symbols on the Inverter
Symbol
Designation
Explanation
Inverter
This symbol defines the function of the
green LED. The green LED indicates the
operating state of the inverter.
Observe documentation
This symbol defines the function of the red
LED. The red LED indicates an error.
Read this document for instructions on how
to remedy the error.
Communication
This symbol defines the function of the blue
LED. The blue LED indicates the
communication state of the inverter.
Equipment grounding
conductor terminal
Connection for the AC equipment
grounding conductor
