6 Electrical Connection
SMA Solar Technology AG
28
MC-BOX-6_12-BE-en-20
Operating Manual
Procedure:
1. Prepare the connection cables (see Section 6.2 "Preparing the Cables", page 24).
2. Connect the grounding conductor and N to the terminal
X3 PV-System
as labeled.
3. Connect L1, L2 and L3 to the terminal X3
PV-System
as labeled.
6.3.4 Connecting the Sunny Island
Fuse of the Sunny Island inverters
Each Sunny Island is fused by a circuit breaker inside the Multicluster Box.
• Multicluster Box 6.3-11: 40 A
• Multicluster Box 12.3: 32 A
Optimum mounting location
If the Multicluster Box and the Sunny Island inverters are operated under different ambient
conditions, the circuit breakers for the Sunny Island inverters may trip more often.
• To ensure optimum operation, mount and install the Multicluster Box and the Sunny Island
inverters at the same location.
