Electrical performance estimation of PV module using designed measurement system

The photovoltaic module shows difference in efficiency according to the manufacturing method, and in case of operation mode, identical PV modules with the same manufacturer also become to show difference data in generation efficiency according to their management method. In other words, the unbalance of efficiency in specified modules connected as a series or a parallel array reduces the total generation efficiency, so there is a required for studies based on the electrical properties of modules exposed to an outdoor environment. This paper suggest the real time measurement system for the individual state of a fixed PV array and get the experimental data from its devices. As a result of analyzing the experimental data, we are find 4 PV modules with serious deterioration. The initial parameters of PV modules are estimated by using computer simulation and used the basis of PV module deterioration.