SMA Solar Technology AG
Installation Guide
SB50US-80US-IUS094030
61
Negative Grounding
9. Torque all wires in the terminal blocks inside the SMA DC-Disconnect to 15 in-lb (1.7 Nm).
To verify that your inverter is grounded as intended please refer to section 5.7 "DC Input
Grounding" (page 56).
7. Connect the positive DC wires (A) to the terminal
labeled PV UNGROUNDED in the SMA DC-
Disconnect.
8. Connect the negative DC wires (A) to the terminal
labeled PV GROUNDED in the SMA DC-Disconnect.
10. Use a screwdriver in order to poke a hole in the
groove of the grommet.
11. Remove the membrane.