The sun shines on the earth, there is no geographical limit whether land or sea, whether mountain or island, everywhere, can be directly exploited and used, easy to collect, and do not need mining and transportation. The amount of solar radiation reaching the earth's surface every year is equivalent to about 13 trillion tons of coal, which is the largest energy source that can be exploited in the world today. Solar panels are widely use in the houseroof and the solar farm to get the solar energy .