Wiring the Sunny Boy
SMA America, LLC
42
SB20_25_30HFUS-eng-IUS113711
Installation Guide
AC Grounding
The Sunny Boy must be connected to the AC ground from the utility via the Ground Terminals
.
See illustration above (C).
PV Grounding
The PV array ground must be connected to the array grounding and DC Grounding Electrode
Conductor – see illustration on page 47. The size for the conductor is usually based on the size of the
largest conductor in the DC system.
DC Grounding Electrode Conductor
A DC grounding electrode conductor may be required by the Authority Having Jurisdiction (AHJ).
Use the array grounding and DC Grounding Electrode Conductor – see illustration on page 47.
6.2 Lower view of the SMA DC-Disconnect
The following graphic shows the bottom of the SMA DC-Disconnect.
Object
Description
A
Knob of SMA DC Disconnect
B
Opening with protective cap (AC side) for
3
⁄
4
in. (19 mm) cable conduit.
C
Fan with fan bracket
D
Handle of the fan bracket
E
Opening with protective cap (DC side) for
3
⁄
4
in. (19 mm) cable conduit.
