The BAPV system on regional buildings uses distributed energy flexible interconnection technology to interconnect and integrate existing building multi-energy systems and perform "network-source-load" coordination. Through a 5G+-basedmulti-source sensing network, system equipment fault warning and energy efficiency wisdom management are realized to achieve the goal of stable operation, energy conservation and carbon reduction. It can be installed on roof BAPV systems in the shapes of flat tops, sloping roofs, spires, etc., with general capacity range: 0.1-10MWp; output voltage is 10kV (50Hz), and the average PR efficiency of the system is>80%. The system has a 5G+ information collection network dominated by multi-source sensing to realize functions such as the collection of photovoltaic data and environmental data, the collection of video information on photovoltaic array working conditions, and GPS positioning. Improve the utilization rate of new energy, and the on-site consumption rate is>90%. Taking the 1MWp standard system as an example, it can save about 7878 tons of standard coal, reduce carbon dioxide emissions by about 19,000 tons, sulfur dioxide by about 560 tons, and nitrogen oxides by about 68 tons every year. Reduce the cost of daily electricity to 0.54 yuan/kWh.