In solar photovoltaic power generation systems, the connection lines between components and centralized photovoltaic devices are reduced, and the protection of photovoltaic-specific fuses, brackets and lightning arresters improves reliability and facilitates system maintenance. According to the DC voltage range of the photovoltaic input, a certain number of photovoltaic modules of the same specifications are formed into a photovoltaic module series, and then several series are connected to the photovoltaic array lightning protection combiner box.