SMA Solar Technology AG
Installation Guide SB50US-80US-IUS094030 63
Positive Grounding
3. 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" (page56).
1. Connect the negative DC wires (A) to the terminal
labeled PV UNGROUNDED in the SMA DC-
Disconnect.
2. Connect the positive DC wires (A) to the terminal
labeled PV GROUNDED in the SMA DC-Disconnect.
4. Use a screwdriver in order to poke a hole in the
groove of the grommet.
5. Remove the membrane.
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