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The SPS generates DC power supply needed for operation of the circuit of the inverter
itself.
The Discharger/Charger block converts battery voltage to high-BUS DC voltage or
converts high-BUS DC voltage to low battery voltage. This block uses high frequency
isolation technology. The block charges the battery when the efficient power from PV
modules or the utility power is generated more than the load needed. On the contrary, the
block will discharge the battery power to the DC BUS.
The switch block is controlled by the CNTL block and used to control if the inverter is
connected to grid or not and the load is on or off.
The COMMUNICATION and Intelligent slot block are used to communicate with the
computer to maintain or setup the system, and it can be used to detect what happened
when the PV inverter is abnormal.