SMA SB 1100LV - Manual (Page 15)

SMA Technologie AG Installation requirements
Installation Guide SB1100LV-11:SE2006 Page 15
5.2 PV generator requirements
The Sunny Boy SB 1100LV is internally designed to be connected directly to up to two
strings (PV modules wired in series) having a homogenous structure (modules of the
same type, identical orientation and tilt).
For connecting the PV generators, the unit has two DC terminal blocks, which each have
connections for two strings. If you want to connect more than two strings to the Sunny
Boy SB 1100LV, you must use a DC distribution box.
The DC side must be equipped with a DC circuit breaker compliant to DIN VDE 0100-
712 to allow the PV generator to be disconnected from the Sunny Boy.
"Sunny Design" helps you design the system and check string size taking the relevant
inverter into consideration. Further information on "Sunny Design" is available at
www.SMA.de .
5.3 Low voltage grid (AC)
The Sunny Boy must have a three-conductor connection to the mains grid (live (L),
neutral (N), protective earth (PE)).
The grid connection terminals on the AC connection
socket included in the accessories kit can take wires
with a cross-section of up to 2.5 mm². The
accessories kit also contains a PG13.5 AC
connection socket for connecting cables with a cable
diameter between 9 mm and 13.5 mm, while the
PG16 connection socket is used for cables with cable
diameters from 13.5 mm up to a maximum of 17 mm. For detailed instructions, see
chapters "Connecting the AC output with PG13.5" (Page 22) and "Connecting the AC
plug with PG16" (Page 24).
The Sunny Boy SB 1100LV operates with high currents on the DC side. If there is
a fault in a string, the current of this string is routed via another string as reverse
current. This can irreparably damage the PV generators. See chapter 6.3
"Reverse current" (Page 27) for more information.
Limit values for DC input
Max. voltage 60 V (DC)
Max. input current 62 A (DC)
Wire
cross-section
Cable
diameter