Rated output power and conversion efficiency of solar cells, generally speaking, the battery pack per unit area, the higher the conversion efficiency, the greater the output power. Conversion efficiency of solar cells is generally between 14 to 17%, per square centimeter of cells, the output power at 14 ~ 16mW, about 120WP solar power generation using solar energy technology principle per square meter of the solar cell module output power is not very universal use of solar power generation and there are still high cost and low efficiency problems, but in terms of solar cells to provide energy for the satellite has been applied. Solar energy is the energy of nuclear fusion reactions inside the sun or sunspot surface continuously generated. Earth orbits the Sun on average radiation intensity 1369w / m. Earth's equatorial circumference of 40000km, thus calculated, the Earth's energy to get up 173000TW. Standard peak intensity at sea level is 1kw / m2 photovoltaic industry and commerce, the Earth's surface to a point 24h annual average radiation intensity is 0.20kw / m, the energy equivalent of 102000TW humans rely on these energy to survive, including all other forms of renewable energy sources (excluding geothermal resources) rooftop photovoltaic power generation, although the total amount of solar energy resources equivalent to the current human use of energy ten thousand times, but the low energy density of solar PV subsidies, and it varies from place because of the time change, which is the main problem facing the development and utilization of solar energy. Photovoltaic solar power benefits _ TIANHUI (certified) _ 洪山光 volt power provided by the Wuhan days Hui Technology Co., Ltd. giant. Wuhan Tian Hui Ju Technology Co., Ltd. (www.thjnkj.com) (www.thjnkj.com) is a leader in Wuhan, energy-saving equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In the day-solar power leader with the staff warmly welcome all inquiries negotiations to create day-solar power a better future.