SMA Solar Technology AG Electrical Connection
Installation Guide SB20_25_30HF-IEN102911 45
6.3 Connection of the PV Generator (DC)
6.3.1 Conditions for the DC Connection
• Requirements for the PV modules of the connected strings:
– Same type
–Same number
– Identical alignment
– Identical tilt
• The connecting cables from the PV modules must be fitted with plug connectors. You will find
the necessary DC plug connector for DC connection in the delivery.
• The following limit values at the DC input of the inverter must not be exceeded:
Use of Adaptors
Adaptors (branch connectors) must not be visible or freely accessible in the immediate
surroundings of the inverter.
• The DC current flow must not be interrupted via adaptors.
• Observe the procedure for disconnecting the inverter as described in
section8”Disconnect the Inverter from Voltage Sources” (page60).
Sunny Boy Maximum input voltage Maximum input current
SB 2000HF-30 700 V 12 A
SB 2500HF-30 700 V 15 A
SB 3000HF-30 700 V 15 A