Junction box and solar power system

A solar power system, comprising:

• a plurality of photovoltaic (PV) modules, each comprising a plurality of solar cell panels connected in series and a junction box connected to the plurality of solar cell panels, the junction box comprising:
• a detection module, to detect parameters of the corresponding PV module and generate a reporting signal, wherein the reporting signal comprises the parameters and an identification of the corresponding PV module;
• a communication module, to transmit the reporting signal;
• and
• a state indication module, to indicate a state of the PV module;
• and
• a control device, to determine if the plurality of PV modules are abnormal, comprising:
• a storage module, to store an amount of the plurality of PV modules;
• a transceiver module, to receive the reporting signals from the plurality of PV modules;
• and
• a comparison module, to compare the stored amount of the plurality of PV modules with an amount of the received reporting signals to determine if the plurality of PV modules are abnormal, and to generate a state indication signal according to the determination;
• wherein the transceiver module further transmits the state indication signal to corresponding junction boxes according to the identifications of the corresponding PV modules in the received reporting signals, and the communication modules of the corresponding junction boxes receive the state indication signal from the transceiver module, and sends the state indication signal to the corresponding state indication modules to indicate the state accordingly.