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6 Electrical Connection
6.6
DC Connection
6.6.1
Requirements for the DC Connection
Connection options:
One string each can be connected to each DC input of the inverter during normal operation. The
DC inputs A and B can however be operated in parallel, and thus up to three strings can be
connected to inverters with two DC inputs and up to four strings to inverters with three DC inputs.
The following device types have two MPP trackers and therefore two DC inputs (A and B):
• SB3.0-1SP-US-41
• SB3.8-1SP-US-41
The following device types have three MPP trackers and therefore three DC inputs (A, B, and C):
• SB5.0-1SP-US-41
• SB6.0-1SP-US-41
• SB7.0-1SP-US-41
• SB7.7-1SP-US-41
Sunny Boy 3.0-US / 3.8-US
DC-in
_
_
+
+
Figure 12 : Connection overview for normal operation
46
SBxx-1SP-US-41-IA-xx-10
Sunny Boy 5.0-US / 6.0-US / 7.0-US / 7.7-US
COM
DC-in
COM
AC-out
SPS
X1
M1
X2
M2
ANT.
FCC ID: SVF-KP20
DISPLAY
IC: 9440A-KP20
A
B
D-IN
SPS
Max. 30V DC
BAT
MFR
USB
+
SMA Solar Technology AG
DC-in
_
_
+
+
COM
DC-in
COM
AC-out
SPS
X1
M1
X2
M2
ANT.
FCC ID: SVF-KP20
DISPLAY
IC: 9440A-KP20
A
B
D-IN
SPS
Max. 30V DC
BAT
MFR
USB
_
Installation Manual
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