SMA SUNNY BOY 3800 - Connection of the PV Generator (DC); Conditions for the DC Connection

SMA Solar Technology AG Electrical Connection
Installation Guide SB33_38-IEN111851 29
5.5 Connection of the PV Generator (DC)
5.5.1 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 of the PV modules must be equipped 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 circuit may not be interrupted by adaptors.
• Observe the procedure for disconnecting the inverter as described in section
7.2”Opening the Inverter” (page43).
maximum input voltage maximum input current
500 V (DC) 20 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, it can result in an electric arc and hence a risk of fire.
• Ensure that the input current for each string does not exceed the maximum flow
current of the plug connectors used.