Nowaday, solar power has more play a role more than the past because the technology has been developed continuously people turn to and reliably. The analysis of the US Department of Energy at current cost of solar power (1.6 million baht per kilowatt) of photovoltaic systems. Price per unit of electricity produced cheaper electricity prices will start at Hawaii, California, Massachusetts, New York and Arizona's Julie Bassett, and if there was added incentive. To make the cost price The solar system is reduced to approximately one hundred thousand baht at any price per unit of solar power will be reduced to close to the price of electricity, almost all states. According to solar power has been continuing to develop so, it impacts on decreasing of solar energy installing cost. Then, it surely has become more cost-competitive with others renewable energy. Moreover, the solar industry have improved there location by expanding the areas of solar panels location to gain more sunlight so that it can produce more output in form of electricity.