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3 Product Description
3.1 Sunny Boy
The Sunny Boy is a transformerless PV inverter which converts the direct current of the PV array to
grid-compliant alternating current and feeds it into the utility grid.
Figure 1: Design of the SunnyBoy
Position Designation
A Power Unit
B Enclosure lid of the Power Unit
C Enclosure lid for the Connection Unit
D Connection Unit
E DC load-break switch
The inverter is equipped with a DC load-break switch. If the DC load-break switch is
set to the position I, it establishes a conductive connection between the PV array
and the Power Unit. Switching the DC load-break switch to the O position will inter-
rupt the DC electric circuit.
3 Product Description
SMA Solar Technology America LLC
User ManualSB30-77-1SP-US-40-BA-en-1112
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