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SMA Solar Technology AG
Sunny Boy 3.0-US / 3.8-US
DC-in
_
_
+
+
Figure 13 : Connection overview for parallel connection of the DC inputs A and B
Requirements for the PV modules per input:
☐ All PV modules should be of the same type.
☐ All PV modules should be aligned and tilted identically.
☐ If inputs A and B are connected in parallel, the PV modules of inputs A and B should be
identically aligned and the same number of PV modules connected in series must be
connected to all strings of inputs A and B.
☐ The maximum inverter system voltages permitted may not be exceeded (see Section 10
"Technical Data", page 65).
☐ The maximum short-circuit current may not be exceeded (see Section 10 "Technical Data",
page 65).
Additionally required material (not included in the scope of delivery):
☐ Conduits (trade size: 21 mm (0.75 in) or smaller with suitable reducer bushing)
☐ UL-listed raintight or liquidtight conduit fittings (trade size: 21 mm (0.75 in) or smaller with
suitable reducer bushing)
Requirements on the DC conductors:
☐ The conductors with regards to its ampacity, rated temperatures, operating conditions and its
power loss must be made in accordance with the local standards and the National Electrical
®
Code
ANSI/NFPA 70 or the Canadian Electrical Code
☐ The DC terminal block temperature rating is +90°C (+194°F).
☐ Conductor type: copper wire
☐ Maximum permissible temperature: 75°C (+167°F) or 90°C (194°F)
☐ The conductors must be made of solid wire, stranded wire or fine stranded wire. When using
fine stranded wire, bootlace ferrules must be used.
☐ Conductor cross-section: 2.5 mm² to 10 mm² (14 AWG to 8 AWG)
Installation Manual
COM
DC-in
COM
AC-out
SPS
M1
M2
X1
X2
ANT.
FCC ID: SVF-KP20
IC: 9440A-KP20
DISPLAY
Max. 30V DC
A
B
D-IN
SPS
BAT
MFR
USB
_
+
Sunny Boy 5.0-US / 6.0-US / 7.0-US / 7.7-US
DC-in
_
_
+
+
+
®
CSA C22.1.
SBxx-1SP-US-41-IA-xx-10
6 Electrical Connection
COM
DC-in
COM
AC-out
SPS
M1
M2
X1
X2
ANT.
FCC ID: SVF-KP20
IC: 9440A-KP20
DISPLAY
Max. 30V DC
A
B
D-IN
SPS
BAT
MFR
USB
_
_
+
47
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