SMA SB 3000TL-20 Installation - Manual (Page 35)

SMA Solar Technology AG Electrical Connection
Installation Guide SB30TL_40TL_50TL-IA-IEN120231 35
• For each input zone (A or B), the following are the requirements for the PV modules of the
connected strings:
– Same type
– Same number
– Identical alignment
– Identical tilt
• When connecting just 2 identical strings, it is more efficient to connect these to only one input
zone also.
Exception: shaded strings or if the total input current is more than 15 A.
• The connecting cables of 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:
,
No mixed connections between input zones
For instance, if the positive pole of a string is connected at input zone A and the negative
pole at input zone B, this is called a mixed connection.
Only connect strings at one input zone and never mix the input zones A and B!
Otherwise, the inverter no longer fulfills the requirements of the EMC Directive (Directive
on the electromagnetic compatibility of a device) and therefore loses its operation license.
maximum input voltage Maximum input current
Input area A Input area B
550 V 15.0 A 15.0 A