The Effect of Photon Flux Density and Module Temperature on Power Output of Photovoltaic Array

This article presents the effects of photon flux density and module temperature on power output of amorphous silicon (a-Si), polycrystalline (p-Si) and hetero-junction intrinsic thin layer (HIT) photovoltaic (PV) modules under Thailand climatic condition which located at the equator zone. The outdoor solar irradiance distribution measurements on the PV array installed at Energy Park, School of Renewable Energy Technology (SERT), Naresuan University, Thailand revealed that the solar irradiance is directly proportional with photon flux density which the wavelength is influence of photon flux density. The increasing of power output under real working of a-Si and p-Si depends on both photon flux density and module temperature. But the increasing of power output of HIT mainly depends on both photon flux density.