Photovoltaic junction boxes are crucial components in PV modules for connection and protection. Integrated ones have a simple structure with one box housing diodes and cables, offering low - cost and easy installation. However, they face heat - dissipation and resistance issues in high - power applications. Split - type junction boxes consist of multiple boxes, each with one diode and separated positive/negative cables. They have excellent heat - dissipation, can boost module power and reduce cable usage, yet are costlier and require more complex installation. The former suits small - scale distributed projects, while the latter is more suitable for large - scale ground - mounted power plants.

This paper mainly talks about the importance of photovoltaic junction box in photovoltaic module, the cost value of photovoltaic junction box and its safety impact on photovoltaic module .