SMA Sunny Boy 6000US - Wiring the Sunny Boy Inverter

SMA Solar Technology AG
36 SB50US-80US-IUS094030 Installation Guide
5 Wiring the Sunny Boy
This section provides step-by-step procedures and other information required for wiring the Sunny Boy
to the PV array and the utility grid. To complete the installation in a safe and efficient manner,
complete the steps in the order that they appear.
For inverters provided with a fixed AC output:
AC Grounding
The Sunny Boy must be connected to the AC ground from the utility via the Ground Terminal (PE) (see
3.2"Locating Internal Components" (page19)).
PV Grounding
The PV array (frame) ground should be connected to the PV Grounding and DC Grounding Electrode
Conductor (see 3.2"Locating Internal Components" (page19)). The size for the conductor is usually
based on the size of the largest conductor in the DC system.
WARNING!
Before connecting or operating the Sunny Boy, read all of the instructions, cautions, and
warnings on the Sunny Boy, the PV array and in this Installation Guide.
WARNING!
You must connect the wires that carry the AC voltage from the Sunny Boy to the utility grid
and the wires that carry the DC voltage from the PV array to the Sunny Boy in the order
described in the procedures in this section. Deviating from these procedures could expose
you to lethal voltage that can cause serious injury.
WARNING!
Always turn OFF all breakers and switches in the PV system before connecting any wires
to or disconnecting any wires from the Sunny Boy.
The AC input and AC output circuits are isolated from the enclosure and system grounding,
if required by section 250 of the National Electric Code, ANSI/NFPA 70, is the
responsibility of the installer.
The Photovoltaic System Grounding shall be installed per the requirements of sections
690.41 through 690.47 of the National Electric Code, ANSI/NFPA 70, and is the
responsibility of the installer.