SMA SC 250U - Manual (Page 34)

6 Electrical connection SMA America, LLC
34 DISU_SCUS-IA-IUS111711 Installation Guide
Connection sequence to inverter:
For good access to all DC homerun terminals always contact from the back row to the front row and
always from the bottom to the top contact within each row.
The connection sequence in terms of home run numbers is shown in figure 14 and listed below.
Figure 14: DC home run numbers to inverter
Row Home run number
1 4 and 2
2 9, 3 and 1
3 8 and 6
4 7 and 5