Electrical connection SMA America, LLC
44 SB30-40US-IUS103030 Installation Guide
20. Connect the wires to the terminal blocks in the Sunny Boy and tighten them to a torque of
15in‑lbs. (1.7 Nm).
21. Verify that all connections are correctly wired and properly torqued. Pull on the cable in order
to make sure that it is sufficiently fixed in the terminal.
☑ The AC cables are connected.
18. Connect the white wire of the SMA DC Disconnect to the
terminal labeled N and the black wire to the terminal
labeled L1 of the Sunny Boy.
19. Connect the red wire to the terminal labeled L2 in the
Sunny Boy.
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