6 Electrical Connection
SMA Solar Technology America LLC
Installation ManualSTP50-US-40-IA-en_es-1124
Electrical installations
All electrical installations must be carried out in accordance with the applicable electrical
standards on site and the National Electrical Code
®
ANSI/NFPA 70.
• Before connecting the inverter to the utility grid, contact your local grid operator. The
electrical connection of the inverter must be carried out by qualified persons only.
• Ensure that no cables used for electrical connection are damaged.
6.2 Overview of the Connection Area
X2
Max. 30V DC
USB
M2
FCC ID: SVF-KP20
IC: 9440A-KP20
ANT.
SPS
B
A
X1
M1
MFRBAT
Figure 6: Connection areas of the inverters' AC Connection Unit and DC Connection Unit
Position Designation
A Slots for AC surge protection devices
B Terminal blocks for AC connection
C Bridge between N and enclosure
D Equipment grounding terminal for the equipment grounding conductor of
the utility grid
E Enclosure opening for AC connection (for 50.8mm (2in) trade size con-
duits)
F Enclosure opening for the connection of an additional conductor (for
27mm (1in) trade size conduits)
G Cable glands for network cables and, if needed, for the connection ca-
bles of the AntennaExtensionKit or other data cables
H Positive and negative connectors for DC connection
I Equipment grounding terminal for the equipment grounding conductors of
the PV array
ENGLISH