SMA PVO-N-20 - Manual (Page 33)

SMA Solar Technology AG 7 Electrical Connection
Installation Manual PVO-BOX-IA-en-10 33
12. Screw all enclosure lids onto the
SMA PV Offset Boxes using the 4 screws
(torque: 5 Nm).
7.3 DC Connection
7.3.1 Conditions for DC Connection
The SMA PV Offset Box is connected in parallel to the inverter. Depending on the type of inverter, you
will need different DC connection options on the inverter for this.
If the necessary DC terminals are free on the inverter, you can connect the SMA PV Offset Box directly
to the inverter. If the necessary terminals are not free, you will have to connect the SMA PV Offset Box
via a Y plug. An individual Y plug will be needed for the DC output of each SMA PV Offset Box which
cannot be connected directly to the inverter (for order numbers, see Section 13).
The DC connection cables must be fitted with the supplied DC connectors for connection to the
SMA PV Offset Box (see Section 7.3.1 "Conditions for DC Connection", page 33).
Danger of electric arcs if the DC circuit is interrupted by Y plugs
• Y plugs must not be visible or freely accessible in close proximity to the inverter.
• The DC circuit must not be interrupted by Y plugs.
• Follow the procedure for disconnection of the inverter (see installation manual of the inverter).
• Follow the procedure for disconnection of the SMA PV Offset Box (see Section 9).