Regarding the input current detection circuit of Huawei SUN2000 inverter, which of the following statement is correct?
A . Inverter input positive and negative poles cause the input current detection circuit to be damaged, and the inverter will be irreparable.
B . Monitor the input current of each string, and alarm when the string is working abnormally.
C . After the DC switch is closed, the input current detection circuit starts to work.
D . The input current detection circuit is inaccurate to a single string according to the MPPT detection.
Answer: B