Abstract: Combined with 10 kW photovoltaic test station in Xinyang area, the historical data collected by monitoring system is organized, the effect of irradiance on daily power generation of inverters were analyzed under four-type weather, and the influence of ambient temperature on inverter power generation was analyzed on clear days. For the distribution of light resources in Xinyang, the annual operation data of the inverter was analyzed and counted, and the corresponding weight coefficients and inverter efficiency were analyzed with seven power points. According to the efficiency weighting formula,"Xinyang efficiency" was calculated, and a method is proposed to improve inverter power generation in Xinyang area. Finally, Fluke435-Ⅱ power quality analyzer was used to monitor the AC grid-connected sides of two inverters, and the test results were compared and analyzed in detail.