SMA America, LLC
2 Safety
Installation Manual
SB3-5TLUS22-IA-en-10
13
2 Safety
2.1 Intended Use
The Sunny Boy is a transformerless PV inverter which converts the direct current of a PV array into
grid-compliant alternating current and feeds it into the power distribution grid.
Figure 1: Design of a PV plant with a Sunny Boy
☑ The following grounding systems are approved.
Figure 2: Approved grounding systems for inverter usage
Item
Designation
A
PV modules input A
B
PV modules input B
C
Inverter with DC Disconnect
D
Miniature circuit-breaker
E
Loads
F
Electricity meter
G
Power distribution grid
