THERMAL RECOVERY EFFECT ON LIGHT-INDUCED DEGRADATION OF AMORPHOUS-SILICON SOLAR MODULE UNDER THE SUNLIGHT

The thermal recovery effect from the light-induced degradation under t he sunlight is experimentally investigated on the amorphous silicon ph otovoltaic module (a-Si PV module) for installing directly to the roof flames of wooden houses. To enhance the recovery effect, the heat-ins ulating material is attached to the back side of the module for increa sing the module temperature under the sunlight: the heat-insulated mod ule. The generated power from the heat-insulated module is compared wi th that from the normal module (without the heat-insulating material) for 2 yr, and it has been cleared that the generated power normalized at 25 degrees C from the heat-insulated module is approximately 7.3% h igher than that from the normal one with the average temperature incre ase of 4.2 degrees C under the sunlight.