Dc Connection; Requirements For The Dc Connection - SMA SUNNY BOY 3.0-US Instructions D'installation

6 Electrical Connection
6.4

DC Connection

6.4.1

Requirements for the DC Connection

Connection options:
One string each can be connected to each DC input of the inverter during normal operation. The
DC inputs A and B can however be operated in parallel, and thus up to three strings can be
connected to inverters with two DC inputs and up to four strings to inverters with three DC inputs.
The following device types have two MPP trackers and therefore two DC inputs (A and B):
• SB3.0-1SP-US-40
• SB3.8-1SP-US-40
The following device types have three MPP trackers and therefore three DC inputs (A, B, and C):
• SB5.0-1SP-US-40
• SB6.0-1SP-US-40
• SB7.0-1SP-US-40
• SB7.7-1SP-US-40
Figure 9 : Connection overview for normal operation
32 SB30-77-1SP-US-40-IA-xx-13
SMA Solar Technology America LLC
Installation Manual