SMA PVO-N-20 - Manual (Page 34)

7 Electrical Connection SMA Solar Technology AG
34 PVO-BOX-IA-en-10 Installation Manual
Connection of String Inverters with One Single Input
For a string inverter, 1 positive and 1 negative DC terminal is required on the SMA PV Offset Box.
Only in the operating modes "Continuous operation" or "Temporary operation" will both positive DC
outputs on the SMA PV Offset Box need to be assigned. If only 1 DC input is to be connected, the
second positive DC terminal on the SMA PV Offset Box must also be connected to PV+ on the inverter.
The following DC connection options are possible (as examples):
Figure 12: DC connection options for a string inverter
Connection Options
Option Description
A String inverter with DC input not assigned - operating mode "Night mode"
B String inverter with all DC inputs assigned - operating mode "Night mode"
C String inverter with all DC inputs assigned - operating mode "Continuous operation"
or "Temporary operation"