SOLIS

In PV systems, grid over-voltage faults (OV-G-V0X) can occur frequently, especially in areas with weak grids and high solar PV grid-connected capacity. Such faults are common and in this episode of Solis seminar, we will share with you the causes of “OV-G-V0X", and how to rectify the issue.

PID effect, micro-cracks, and hot spots are three important factors that can affect the performance of crystalline silicon photovoltaic modules. Among them, PID effect and hot spots usually appear after installation and operation of PV panels for a period of time. Micro-cracks are a common problem associated with solar photovoltaic modules and they are difficult to detect with the eyes. In view of these potentially hidden problems, how we identify and rectify them is important. In the last Solis Seminar, we introduced the problem of PID effect and its solutions. In this seminar, we will share with you the causes of cell micro-cracks, how to identify them and ultimately prevent them.

Potential Induced Degradation (PID) is a phenomenon which affects some PV modules with crystalline Si cells and leads to gradual deterioration of performance. The degradation can be as much as 30% or more after a few years. Some module manufacturers are already working to develop countermeasures by using new materials, but the general trend to three-phase systems and system voltages more than 1,000 VDC is currently exacerbating the problem rather than alleviating it. In addition to negative earthing of the PV array, Solis now offers a simple technical solution to prevent this reduction in power of PV modules. This Solis Seminar first gives a brief overview of the PID effect and then explains how the Solis built-in PID Recovery module works and when it can be used.