During winter or some cold days, will the inverter generation decrease?

The power generation of the photovoltaic system is indeed affected by temperature, but the impact is very small. The factors that directly affect the power generation are the irradiation intensity and the duration of sunshine as well as the operating temperature of the solar cell module. In winter, the temperature is relatively low and the duration of sunshine will be shorter, so generally the power generation is less than that in summer, and this is also a normal phenomenon.