SMA Solar Technology AG
Installation Guide
SB50US-80US-IUS094030
53
18. Connect the wires to the terminal blocks in the Sunny Boy and tighten them. Torques for AC
connection terminal blocks:
19. 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.
For 277 V connect the red wire to the terminal
labeled
in the Sunny Boy (not used).
Grey Terminal Blocks (Weidmüller)
10 - 6 AWG: 18 in-lb (2 Nm)
Green Terminal Blocks (Phoenix)
8 - 6 AWG: 40 in-lb (4.5 Nm)
10 AWG: 22 in-lb (2.5 Nm)
