A Fine Model for Evaluating Actual Output Performance of Crystalline Silicon Solar Modules

Abstract

Textured crystalline silicon solar cells, planar crystalline silicon solar cells, textured glass, planar glass are commonly fabricated for crystalline silicon solar modules, thus, there are four kinds of crystalline silicon solar modules. The photovoltaic electricity outputs of the four kinds of modules with the same peak power measured under standard test conditions are different under true sunshine conditions; it is believed that the reflection losses of the four kinds of modules are different due to the different materials used in modules. Using the actual optical performance of a four-layer encapsulation, a simulation was made on the reflection losses and energy outputs of the four kinds of solar modules. The computer simulation shows that the module encapsulated by textured crystalline silicon solar cells and textured glass has more energy output than others in actual uses, even if they have equal electrical characteristics under standard test conditions, the result of simulation agrees approximately with the measured values. Performing energy production analysis for the four kinds of modules with the same peak power as a function of angle of incidence provides insight into economic analysis of photovoltaic systems and performance estimation of a photovoltaic roof within a fixed flat plate array.