Research on the effects of solar radiation on the temperature rise of PV grid-connected inverter

PV grid-connected inverters have to work for a long time in the sunlight-exposed environment. However, there is almost no research on the effect of solar radiation on the operation stability of PV grid-connected inverters. Also, there are no requirements for the testing and certification of PV grid-connected inverters in terms of solar radiation. However, some PV grid-connected inverters have been found to load shedding and shutdown faults under strong sunlight-exposed environments, which cause the problem of power abandonment and limitations that are receiving increasing attention. In this paper, the data analysis of the temperature rise of PV grid-connected inverter components under different irradiance of solar radiation found that, during the temperature rise test, the additional solar radiation applied to the PV grid-connected inverter temperature rise has an additional enhancement. The higher the irradiance of solar radiation on the PV grid-connected inverter is, the greater the impact of temperature rise received. This paper also can provide a reference for the selection, installation, and power plant operation and maintenance of PV grid-connected inverters.