When the Huawei PID module is applied to the SUN2000 scenario, which of the following description is correct? (Multiple Choice)

When the Huawei PID module is applied to the SUN2000 scenario, which of the following description is correct? (Multiple Choice)
A . SUN2000 inverter must use three-phase three-wire system
B . Inverter, AC combiner box, AC power distribution cabinet, etc. cannot have N line connection
C . If the low-voltage side of the grid-connected isolation transformer is a star connection, the N-line can be led out and grounded.
D . Does not support PV/PE compensation mode

Answer: ABD