Power Loss of Crystalline Solar Cell under Cyclic Loadings

Abstract

Abstract In application of building attached photovoltaic in China, the solar cells in the modules are mono-crystalline or polycrystalline cells. In some applications where the wind load is at higher level, a large deflection of the modules will occur. Due to the fluctuation of the wind load, the initial damages inside the cells will develop under this cyclic loading, as a result, the power loss of the solar cell can be observed due to the development of the fatigue damage. In this paper, the fatigue damage evolution of crystalline solar cell in module is investigated experimentally. The damage evolution with the cyclic number was obtained via the measurement of the power loss of the cell. The damage evolution equation was derived based on the continuum damage mechanics and the fatigue life of the cell was predicted.