Installation Instructions
SMA Solar Technology AG Electrical Connection
Installation Guide SB11_12_17-IEN100132 23
5.5 Connecting the PV Generator (DC)
• Requirements for the modules of the connected strings:
– same type
– same number
– identical alignment
– identical tilt
• The connecting wires of the PV modules must be equipped with plug connectors in order that
these DC plug connectors can be connected to the DC input sockets of the Sunny Boy.
A pre-assembled set for connecting the free cable ends of a string is available as optional
accessory from SMA Solar Technology (see section 12 "Accessories" (page46)).
• The following limit values at the DC input of the Sunny Boy may not be exceeded:
Use of Adaptors
Adaptors (branch connectors) are not to be visible or freely accessible in the immediate
surrounding of the Sunny Boy.
• The DC current flow may not be interrupted via adaptors.
• Always disconnect the current flow first via the Electronic Solar Switch.
Sunny Boy Maximum input voltage Maximum input current
SB 1100 400 V (DC) 10 A (DC)
SB 1200 400 V (DC) 12.6 A (DC)
SB 1700 400 V (DC) 12.6 A (DC)
DANGER!
Risk of lethal electric shock or fire!
The maximum possible input current per string is limited by the plug connectors used. If the
plug connector is overloaded, an electric arc may occur and there is a fire risk.
• Ensure that the input current for each string does not exceed the maximum flow
current of the plug connectors used.