Satellite solar battery array in-orbit test circuit

A satellite solar battery array in-orbit test circuit is used for a satellite solar battery array in-orbit IV curve test, and comprises an on-satellite electronic device, an on-satellite information processing unit and a satellite-ground communication unit. After an IV test circuit is switched on, in-orbit real-time data including voltage, current, temperature and the like of a solar battery array can be acquired through the on-satellite electronic device in real time, then is processed by the on-satellite processing unit and is downloaded by the satellite-ground communication unit. A complete solar battery array IV characteristic curve is drawn. The satellite solar battery array in-orbit test circuit overcomes the defects of an existing method that only the voltage and current of the working point of a satellite bus can be counted and the IV curve cannot be visually and comprehensively reflected, improves the accuracy and comprehensiveness of performance monitoring of the solar battery array, provides complete IV curve information for the performance evaluation of the solar battery array, improves the evaluation efficiency of the satellite life, and provides the in-orbit management of the satellite solar battery array with simpler and more visual data support.