Decommissioning
SMA America, LLC
94
SB20_25_30HFUS-eng-IUS113711
Installation Guide
Removing the connection of the Sunny Boy on the AC side
5. Remove the N wire of the Sunny Boy from the
terminal (B).
6. Remove the L1 wire of the Sunny Boy from the
terminal (C).
7. Remove the L2 wire of the Sunny Boy from the
terminal (D).
8. Remove the grounding cables of the Sunny Boy
and from the PV plant both AC- and DC-side from
the terminal block (E).
9. Remove the plug of the fan from the socket (A).
Loosening the connection of the Sunny Boy with the SMA DC-Disconnect
10. Loosen the screw which is used for grounding of the
SMA DC-Disconnect counterclockwise. Lay the
screw to one side in such a way that it will not get
lost.
☑ The connection between Sunny Boy and
SMA DC-Disconnect is removed.
see manual)
One and Two String Wiring
(for more strings and further information see manual)
ding
Negative Grounding
Positive Grounding
Positive Grounding
D
UNGROUNDED
GROUNDED
GROUNDED
UNGROUNDED
UNGROUNDED
GROUNDED
GROUNDED
Terminal
=
~
Facing -
L1
N
L2
+
L1 L2
N
N
L1 L2
+
+
A
C
B
D
E
g Wiring
er information see manual)
One and Two String Wiring
(for more strings and further information see manual)
gative Grounding
Negative Grounding
Positive Grounding
Positive Grounding
UNGROUNDED
GROUNDED
GROUNDED
UNGROUNDED
GROUNDED
GROUNDED
Terminal
=
~
Terminal
=
~
Facing -
N
L1 L2
L1
N
L2
+
L1 L2
N
+
+
