SMA SB 4200TL Multi-String - Manual (Page 16)

Device Description SMA Technologie AG
Page 16 SB4200-12:FE4804 Operating Instructions
3.2.4 Description of Operating States
Stand-by at Night
The Sunny Boy 4200TL Multi-String is
in so-called stand-by operation. This
state is reached if the input power at
the inverter is too low for feeding
operation (all string voltages are be-
low 125 V) and not sufficient for
normal operation.
Initialization
The on-board computer of the Sunny
Boy 4200TL Multi-String is in the initi-
alization phase. At least one of the
string voltages on the inverter is bet-
ween approx. 125 V and approx.
750 V. Power is already supplied to
the internal board, but is not yet suffi-
cient for grid feeding. Data transmis-
sion is not possible yet.
Feeding Operation
The Sunny Boy 4200TL Multi-String
has successfully completed the self-
test of the measurement electronics
and the MSD and starts feeding to
the grid.
MPP operation (default):
The Sunny Boy 4200TL Multi-String
automatically determines the MPP
voltage of the PV generator.
Constant voltage operation:
The operating state „U-Konst“ can be manually defined by the plant operator with
Sunny Boy Control or the PC programs Sunny Data or Sunny Data Control. In the „U-
Konst“ operating mode, the Sunny Boy 4200TL Multi-String uses this externally defi-
ned PV setpoint voltage for its internal control.
All LEDs are off
All LEDs are on
Green LED is on