SMA Solar Technology AG
Electrical Connection
Installation Guide
SB3300TLHC-IEN094121
19
5.3 PV Generator Requirements
The Sunny Boy is designed to be connected to up to two strings having a homogenous structure
(modules of the same type, identical orientation, tilt and number).
Sunny Design will assist you in the system design and checking of the string size for a given type of
inverter. Further information on Sunny Design is available at www.SMA.de/en.
The unit has four DC plug connectors (two for each string) for connecting the PV generators. The
connecting cables from the PV generators must also be fitted with this type of plug connector. The
SMA order codes for the various connectors are as follows [see also section 12 ”Accessories”
(page 39)]:
Correct operation of your Sunny Boy requires, among other things, the connection of the
PE conductor to the equipotential bonding of the building. Please check the prescribed PE
connection from the Sunny Boy case to protective earth when commissioning the device!
DANGER!
Danger to life due to high voltages.
• Do not switch the line circuit breaker on yet! The Sunny Boy may only be connected
to the AC grid once the PV strings are connected and the device is securely closed.
• Multi-Contact 3 mm:
"SWR-MC"
• Multi-Contact 4 mm:
"MC-SET"
• Tyco:
"TYCO-SET"
Limit values for DC input
Max. voltage
750 V (DC)
Max. input current
11 A (DC)
