SMA SB 4200TL Multi-String - Manual (Page 11)

SMA Technologie AG Device Description
Operating Instructions SB4200-12:FE4804 Page 11
3 Device Description
The Sunny Boy 4200TL Multi-String is used in order to convert DC power from pho-
tovoltaic modules to AC voltage and subsequently feed this to the 230 V / 50 Hz
utility. The technical data are specified in chapter 6 "Technical Documentation" (page
41) of this document.
Fig. 3.1: Basic Principle of an Utility Interactive PV Plant with a Sunny Boy 4200TL
Multi-String
Usage of the Sunny Boy 4200TL Multi-String in any applications different from this
will void the warranty.
3.1 Device Design
We have focused on a simple functional design when we developed the Sunny Boy
string inverters. In its basic design the Sunny Boy 4200TL Multi-String does not need
more than three LEDs for status display. A display unit is available. The display can
be already installed when your Sunny Boy is delivered as well as it can be additio-
nally installed later.
The Sunny Boy 4200TL Multi-String will operate fully automatically without any mo-
dification or configuration as long as it is installed and commissioned according to
the technical specifications. It can nevertheless be modified in terms of operating pa-
rameters if necessary. An additional communication interface is required for this,
which also can be used in order to acquire operating data for performance evalua-
tion. Please have a look at chapter 5 "Plant Monitoring" (page 33) for details.
As shown in Fig. 3.2: "Block circuit diagram and typical use of the Sunny Boy 4200TL
Multi-String" (page 12) up to two independent strings of a PV generator can be con-
nected to the Sunny Boy 4200TL Multi-String. As each of the two input ports has its
own separate MPP tracker, it is no problem to connect strings with different orienta-
tion and different modules.
Erdschluss
Earth Fau lt
Ar t.- Nr .: 8 6-00
Photovoltaic
Modules
Sunny Boy 4200TL
Multi-String
Utility
String A
String B