Multicluster Operation SMA Solar Technology AG
132 SI5048-TB-TEN110340 Technical Description
16 Multicluster Operation
16.1 Communication between the Sunny Island
For increased output, up to 12 Sunny Island clusters can be interconnected to form a Multicluster
system. Within each cluster, a communication cable connects the master to the slaves. Each cluster is
connected to the others via another communication cable, connected to the respective master.
The Multicluster Piggy-Back (MC-PB) is inserted in the Sunny Island at the external communication
socket. A grounding conductor is provided with the Multicluster Piggy-Back. It must be connected as
displayed in the graphic.
For orientation, refer to the following figure:
Position Description
A Multicluster Piggy-Back (MC-PB)
B Connection of the PE cable
C Cable route
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