LAUSR

Abstract Low cost and high efficiency has always been the goal of the photovoltaic (PV, solar) industry. With the continuous development of the solar industry, the scale of the solar plant also gradually expanded. Increasing the system voltage can increase the number of solar module in series and reduce the use of inverters, to reduce the cost of the PV system. However, the increase of system voltage will increase the risk of PID (potential-induced-degradation) phenomenon of solar modules, resulting in the decline of solar module power and affecting power generation efficiency. Therefore, to study and solve the anti-PID effect problem of solar modules under high system voltage can effectively improve the income of PV plants. In this paper, the influence of solar module encapsulation materials such as glass, EVA and backsheet on the anti-PID performance of solar module under the condition of 1500 V voltage is systematically studied. It is found that the increase of voltage has significant and continuous PID effect on the crystalline silicon solar module. Compared with different encapsulations, it is concluded that the selection of polyolefin (PO) material as encapsulation film can effectively mitigate the PID effect of conventional solar module under high voltage pressure. The double-glass solar module with glass replacing the backsheet was further investigated, and it was found that the double-glass solar module still had significant anti-PID performance under 1500 V bias.