3.3 Functional features
The DC output generated by the PV generator is filtered by the input
board before it reaches the power board. The input board also
provides functions such as the detection of insulation impedance and
the measurement of the DC current and voltage. The DC current is
converted into AC current by the power board. The AC current is
filtered by the output board and fed into the power grid. The output
board also provides functions such as grid voltage and current
measurement, earth fault protection and a disconnecting relay. The
control board supplies the auxiliary energy, controls the operating
state of the inverter and displays the operating status on the display
board. An error code will appear on the display if the inverter is in an
abnormal operating state. At the same time, the control board may
trigger the relay in order to protect the internal components.
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