Photovoltaic generation output varies depending on weather. On rainy or cloudy days when sunlight is not available, generation capacity drops.

Electrical energy that can be extracted from sunlight shining on the earth is approximately 130 W/m2 on a fine day (assuming a photovoltaic efficiency of 13%). However, considering temperature increase and power conditioner efficiencies, the actual amount of electrical energy available from photovoltaic generation is approximately 100 W/m2 at most.

Therefore, a large photovoltaic module area is needed to generate a large amount of electric power.

Information provided by Nisshin Electric Co., Ltd.