Recently, the reporter learned from Dongguan, a well-known solar manufacturers, despite the pressure of rising raw material prices, solar water heater prices generally rise after the Spring Festival, the first quarter of this year, the plant solar water heater sales still substantial growth over the same period last year, whilethe national "energy conservation" policy to promote and solar building integrated climate impact of the plant on the promotion and application of solar hot water project also achieved quite good results, including new residential system installed to become a major bright spot , 2008 solar companies competing priorities. 

   Authoritative statistics show that China's annual new construction of about 20 million square meters, the building energy consumption reaches 20% of the total energy consumption, building energy efficiency is the key areas of national energy saving target. In accordance with the requirements of the Ministry of Construction, to 2010, China's new buildings achieve green building and energy efficient building standards in the fight for more than 30%. Professionals believe that building energy efficiency can be achieved through a variety of ways, depending on building materials and energy saving can not meet this standard, the application of wind controller energy, or the best choice. 

   Looking at the domestic policy environment, and promote new residential energy-efficient, unified installation of solar hot water systems is the trend. "Of solar thermal Commission of Guangdong Province, Guangdong Fivestar pure sine wave inverter Energy Co. Chairman Hu Guang-liang, analysts say. He gave reporters cited a few examples, Beijing this year will be 5.3 million square meters of affordable housing, limited to two rooms, low-rent housing unified installation of solar hot water systems; Jiangsu Province, from January 1 this year, the new 12-story The following dwelling must be unified installation of solar hot water systems; 

Deployment this year, Hebei Province, the province's solar and other renewable energy annual utilization rate of more than 30% of the new buildings completed in total; Wuhan City, with effect from April 1 this year, the 12-storey new building must be installed solar water heating systems, and to encourage more than 12-story residential buildings using solar energy, new buildings are expected annual saving of 137 million degrees. 

   The data show that China's solar water heater applications from a single type to integrated development to the project type, by family type. Industry pointed out that as solar technology advances, more and more families were using solar water heaters, but because there is no uniform design and installation standards, a lot of solar energy equipment installed there are hidden dangers, and through the integration of design and installation of solar hot water systems, to achieve the perfect unity of function and appearance, the effect is more obvious, especially in multi-user buildings such as the collection of residential.

 If the California Desert 9% of sunlight effectively converted into energy, enough to meet the demand for electricity in the United States. However, the current high cost of solar cell technology, large-scale commercial applications, efficiency is not high enough. At Northwestern University, a research team has developed a new oxide coating, can greatly improve the efficiency of mppt charge controller energy conversion. The U.S. National Academy of Sciences published a report on the study online, the report mainly on the electrode heterojunction organic solar cells, organic engineering.

   The conversion of solar energy technology breakthroughs global researchers and developers more likely to produce relatively inexpensive, can be manufactured, easy to use solar cells. This technique can not only greatly reduce the products of combustion - carbon dioxide greenhouse gases cause global warming, but also can greatly reduce our dependence on fossil fuels. The research team members from various universities and research institutes. New wind grid tie inverter energy conversion technology is gradually forming a solar cell made from organic raw materials like plastic is very attractive because these cells by a process similar to the printing of newspapers, from low-cost and rapid printed into.

   So far, the most successful plastic photocell is called heterojunction cells. This battery uses a semiconducting polymer (an electron donor) and the combination placed between two electrodes (an electronic receiver body), a transparent electrode (positive electrode is usually a mixture of indium oxide and tin), and a negative electrode , the use of materials are typically aluminum. When sunlight enters the transparent electrode is irradiated in a light absorbing polymeric coating on, current is formed to separate pairs of electrons, respectively, the flow of positive and negative two levels. If this process of charging the successful passage of contact between the active coating of the polymer, the process is the current (photocurrent) generated by the battery, and received by the two electrodes - This is a big challenge.

   The Northwestern researchers precipitation technique using a laser, the positive electrode coated with a thin layer of smooth nickel oxide layer. This material is an excellent conductor, the electronics can be obtained from irradiated cells, is equally important that this material can also be effective to prevent the electrons are misleading, the flow of the error electrode, if the flow of the positive electrode will cause a decline in energy conversion efficiency of the battery .

Compared with the earlier cathode coating, low price of nickel oxide coating of the Northwest Research Group, a balanced power and difficult to corrosion. Heterojunction cells, the Northwestern research team has battery voltage increased almost 40%, the energy conversion efficiency increased from about 3% to 4% to 5.2% to 5.6%. The research team is to further adjust the cathode coating technology, to improve its access to and prevent the efficiency of the electronic, and test activities on the ground floor, extending the technology to the production scale.

 In today's world, oil, coal, natural gas and other energy is facing the risk of resource depletion, environmental pressures are also increasing, therefore, environmental protection, energy conservation has become a worldwide all walks of life strive for the goal. Solar energy is a clean, green energy, solid-state semiconductor light-emitting diode (LED) is an environmentally friendly, energy-saving, efficient electric light.

   In the past hundred years, the lighting source has experienced three important stages: incandescent, fluorescent, HID lights. Which is the first generation light source incandescent, fluorescent is the second generation light source, high-intensity gas discharge lamp is a third-generation light source (HID). LED light source has broad prospects for development in the lighting industry today is called the fourth generation light source. LED as a novel semiconductor light source with long life, high luminous efficiency, low power consumption, short startup time, solid structure.

   The solar photovoltaic power generation is dependent on the solar panel manufacturers, the use of the electronic characteristic of the semiconductor material, when the sunlight in the semiconductor PN junction, a strong built-in electrostatic field is generated, since the P-N junction barrier zone, resulting in the potential barrier region of nonequilibrium electrons and holes in or generated in the potential barrier region, but diffusion into the non-equilibrium electrons and holes of the potential barrier region in the built-in electrostatic field under the action of the respective movement in the opposite direction, leaving the potential barrier region, a result, the P region elevated potential N-area potential decrease, thereby to generate a voltage and current in the external circuit, the conversion of light energy into electrical energy.

Solar photovoltaic systems can be roughly divided into two categories, one is the grid system, and the utility grid connected through a standard interface, like a small power plants; the other is a stand-alone power generation system that is in their own within the closed system to form a circuit.

And power generation systems, photovoltaic array will receive the polycrystalline solar panels radiation energy into high voltage DC after high-frequency DC converter, after inverter inverter to the grid output power grid voltage with the frequency, in-phase sinusoidal AC current. Stand-alone power generation system PV array will first receive the solar radiation energy directly into electrical energy supplied to the load, and excess energy after charge controller in the form of chemical energy stored in batteries.

   LED semiconductor lighting source in addition to has the advantages of long life, high luminous efficiency, small size, light weight, environmentally safe and reliable, there is a significant advantage of LED startup and operating voltages, so without the use of ballasts. This saves costs and energy consumption while also greatly reducing the response time pass off.

   Solar photovoltaic technology combined with LED lighting perfect key lies both with the direct current, low voltage and can match each other. Therefore does not need to be a combination of both the direct current generated by solar cells into alternating current, thus greatly improving the efficiency of the entire lighting system. At the same time, by means of grid technology or the use of battery charge and discharge energy, to make it more obvious advantages. With the in-depth study of the technology, the LED luminous efficiency is improved, high brightness LED going to come out, is bound to replace general lighting electric light, and a large number of energy-saving and pollution-free.

 According to UK research firm IMS Research latest research report, driven by the growth of the Asian market performance, inverter 2012 global sales growth of 5%.However, European and American suppliers still occupy a leading position in this market segment departments. 

The report said that despite the slowdown in growth and prices plummeted, but sales still grew from $ 6.7 billion in 2011 to 2012, $ 7.1 billion. Although the global solar market is in trouble, but Asian markets surge in shipments to the global solar inverter market still energize. 

It is worth noting that the fourth quarter of 2012, China and Japan polycrystalline solar panels to shipments a record. The fourth quarter of last year, Asia is the only region of the PV inverter ring up sales. Quarter shipments jumped to 1GW, jumped 63% compared to the same period last year. 

PV inverter, research director Sam Wilkinson said: "In the fourth quarter, the EMEA region (Europe, Middle East and Africa) inverter sales ring than decline by as much as 2%, but the inverter sales in Asia jumped to eliminate weakness in the EMEA region the resulting solar inverter shipments increase from 27GW in 2011 to 31GW of 2012. " 

According to the report revealed that the Photovoltaic Panels sales growth is also affected by the impact of price competition. Market focus gradually shifted to the lower-priced market, such as China, India and Eastern Europe, these markets tend to the larger lower prices inverter. 

The fourth quarter of 2012, the Asian PV inverter sales ring than rose only regional IMS, Asian markets showed a rising trend, but still dominate the global solar inverter industry suppliers in Europe and America. However, as the market focus gradually shifting to Asia, European supplier of decline in 2012. The largest proportion of total market share of the three suppliers in Europe fell sharply in the fourth quarter, the global accounting for less than 30%. 

This year, the top three PV inverter suppliers still: SMA, Power-One and Kaco.However, the fourth quarter of 2012, the global proportion of SMA market share has dropped 20%. It is worth noting that under the companies ranked in the top three significant changes. 2012 four beautiful, supplier performance were based in the United States, Colorado, Advanced Energy, headquartered in California, Enphase Energy, Danish companies Danfoss Solar Inverters and Japanese companies Omron.

 Important new energy base in Gansu Province, Jiuquan usher in the Year of the Dragon, the investment off to a good start. On the afternoon of February 16, the city has four strong photovoltaic industry enterprises Jiuquan City Bureau of Energy signed a cooperation agreement to invest 10.85 billion yuan, Hefei photovoltaic industrial park in Jiuquan, the development of photovoltaic equipment manufacturing industry.

    PV industry in Hefei, Anhui Province accounted for half of the country in recent years, great efforts to cultivate the development of solar energy photovoltaic industry, the industry has shown explosive growth, has successfully established itself as the centralized application base for the development of the first national solar. Especially the LDK Solar battery Hareon,  polycrystalline solar panels, Yang Guan power, a large number of photovoltaic leading enterprises has risen rapidly, and formed a complete photovoltaic industry chain. Jiuquan City, Gansu and even the country's major new energy base, light and heat resources reserves of more than two billion kilowatts by the end of last year, the city's photovoltaic installed capacity of 243 MW, photovoltaic installed capacity will reach 2,000 MW by 2015, a very broad space for development. Cities of Jiuquan and Hefei each other "excuse me" development has laid a solid foundation for cooperation.

    It is understood that four photovoltaic manufacturing enterprises in Hefei, the Jiuquan City Bureau of Energy signed the 8 PV industry investment projects, the total contract value of 10.85 billion yuan. , Hefei Sunlight Power Supply Co., Ltd. will invest 1.75 billion yuan, annual production capacity of 1,000 MW of PV inverters and wind power converter manufacturing projects and 100 MW solar power plant construction projects;

    LDK Solar Hi-Tech (Hefei) Co., Ltd. will invest 3.5 billion yuan to build an annual output of 200 MW PV module production projects and 200 MW solar power plant construction projects; Hefei JA Solar Technology Co., Ltd. will invest 18 billion yuan building year capacity of 100 megawatts of cell production and production projects of 100 MW of PV modules and 100 MW wind grid tie inverter power plant construction projects; Hefei Hirun Photovoltaic Technology Co., Ltd. will also be settled in the Jiuquan Hefei photovoltaic industrial park, invest in solar manufacturing projects and solar power station construction projects.

The Wu Cunrong, Hefei will seize the "golden period" of the development of the central, and the full support of Hefei enterprises to invest in Gansu. The Wu Cunrong, not just the photovoltaic industry cooperation, the development of agricultural industrialization in Hefei, has a number of well-known agricultural processing enterprises, the next step in Hefei and Jiuquan in agriculture, tourism, mineral and other aspects will also find space for cooperation, all-round cooperation.