SMA SUNNY BOY 4000TL, Installation Manual

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Electrical Connection SMA Technologie AG
34 SB40TL_50TL-IEN081211 Installation Guide
• The connection cables of the solar modules must be fitted with plug connectors, so that they
can be connected to the DC plug connectors (2 x 2 for input A and 2 x 2 for input B) of the
Sunny Boy.
A pre-assembled set for connecting the free cable ends from a string is available as an
optional accessory from SMA.
• The following limit values at the DC input of the Sunny Boy may not be exceeded:
Connection procedure
1.
2. Check the connection cables of the solar modules
for correct polarity and that the maximum input
voltage of the Sunny Boy is not exceeded.
Check the system design if the open circuit voltage
of the solar modules is less than 10% below the
maximum input voltage of the Sunny Boy.
No mixed connection of input areas
For example, if the plus pole of a string is connected to input area A and the minus pole
to input area B, this is described as mixed connection.
Connect the strings to one input area only and do not mix input areas A and B!
Otherwise, the Sunny Boy no longer fulfills the requirements of the EMC guideline
(guideline on the
E
lectro
m
agnetic
C
ompatibility of a device) and therefore loses its
operation permission.
Maximum input voltage Maximum input current
Input area A Input area B
550 V (DC) 15.0 A (DC) 15.0 A (DC)
DANGER!
Lethal danger caused by high voltages in the Sunny Boy!
• Before connecting the PV generator, ensure that the AC line circuit breaker is
switched off.