The MPPT combiner box, which is matched with Hopewind C&D smart inverter, is an upgraded product based on traditional combiner box. The C&D PV combiner box is not only with traditional combiner box’s basic performances (such as branch voltage and current detection, protective earthing, lightning protection, and reverse connection protection), but also with new functions, such as DC/DC boost, multi-channel MPPT unit, unit temperature detection and adaptive learning. The new functions extremely improved the generating efficiency of PV station. Moreover, with modular designing, installation and maintenance become easier and faster, which further improves the rate of return on investment.