Electrical Block Diagram - Sofar solar 80KTL User Manual

Board. AC power is filtered through Output Board then AC power is fed into the
grid. Output Board also offer functions such as grid voltage/ output current
detection, GFCI and output isolation relay. Control Board provides the auxiliary
power, controls the operation state of inverter and shows the operation status by
Display Board. Display Board displays fault code when inverter is abnormal
operation conditions. At the same time, Control Board can trigger the replay to
protect the internal components.
Function Module
A. Energy management unit
Remote control to start/ shunt down inverter through an external control
B. Feeding reactive power into the grid
The inverter is able to produce reactive power thus to feed it into the grid
through the setting of the phase shift factor. Feed-in management can be
controlled directly by the grid company through a RS485 interface.
C. Limited the active power fed into grid
If enable the limited of active power function, inverter can limit the amount of
active power fed into the grid to the desired value (expressed as percentage)
D. Self-power reduction when grid is over frequency
If grid frequency is higher than the limited value, inverter will reduce the
output power to ensure the grid stability
E. Data transmission
Inverter or a group of inverters can be monitored remotely through an
advanced communication system based on RS485 interface or via Wi-Fi
F. Software update
USB interface for uploading the firmware, remotely uploading is available.

2.3. Electrical block diagram

SOFAR 80~136KTL has 16-24 DC input strings. 8-12 MPPT trackers that converters
the direct current of PV array to grid-compliant, three phase current and feeds in
80-136KTL
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