SMA SUNNY ISLAND 6048-US - 16 Multicluster Operation; Communication between the Sunny Island Inverters

SMA America, LLC 16 Multicluster Operation
Technical description SI4548_6048-US-TB_en-13 143
16 Multicluster Operation
16.1 Communication between the Sunny Island inverters
For increased output, up to four Sunny Island clusters can be interconnected to form a Multicluster
system. A Multicluster Box for Sunny Island 4548-US / 5048-US /6048-US (MCB-12U) is necessary
for such systems. Within each cluster, a data cable connects the master to the slaves. Each cluster is
connected to the others via another data cable, connected to the respective master.
The Multicluster Piggy-Back (MC-PB) is plugged into the Sunny Island at the external communication
slot. The scope of delivery of the Multicluster Piggy-Back includes a grounding cable. Lay the
grounding cable (B) as illustrated in the following figure:
Item Description
A Multicluster Piggy-Back (MC-PB)
B Connection of the grounding cable
C Cable route
Electrostatic discharge
Electrostatic discharges are an acute danger to the Sunny Island and to the communication
interface. Ground yourself before removing the communication interface from the packaging,
and before touching any components within the Sunny Island. To achieve this, touch PE.