SMA SB 1.5-1VL-40 - Manual (Page 28)

13. Attach the connection cap to the inverter using
the three screws and a Torx screwdriver (TX20)
(torque: 3.5 Nm).
1
2
3
14. Tighten the swivel nuts of the AC cable gland and network connection hand-tight.
15. If the inverter is installed outdoors, install overvoltage protection.
16. Connect the other end of the network cable directly to the computer or router or connect it to
another node. You can only connect the inverter to other nodes via star topology.
6.5 DC Connection
6.5.1 Requirements for the DC Connection
Requirements for the PV modules of a string:
☐ All PV modules must be of the same type.
☐ All PV modules must be aligned identically.
☐ All PV modules must have the same tilt angle.
☐ The thresholds for the input voltage and the input current of the inverter must be adhered to
(see Section 11 "Technical Data", page 52).
☐ On the coldest day based on statistical records, the open-circuit voltage of the PV array must
never exceed the maximum input voltage of the inverter.
Use of Y adapters for parallel connection of strings
The Y adapters must not be used to interrupt the DC circuit.
• Do not use the Y adapters in the immediate vicinity of the inverter. The adapters must not
be visible or freely accessible.
• In order to interrupt the DC circuit, always disconnect the inverter as described in this
document (see Section 10 "Disconnecting the Inverter from Voltage Sources", page 50).
6 Electrical Connection SMA Solar Technology AG
Operating Manual SB15-25-BE-en-10 28