Inverter quality problems exist, photovoltaic power plants, or after five years on major issues will highlight

Visited a number of power stations and many inverter companies, and more deeply understand, Chinese enterprises in the development of the inverter on the road, relying on industry and scale, both in the international community have an unparalleled advantage. PV power plant construction is a systematic project, the inverter is one of the core power devices. However, key parts of the core of the device, he was chief engineer of several inverter companies questioned.

Ups inverter on the market the vast majority of resistors and capacitors, and resistors and capacitors are not ideal, will lead to instability of the inverter performance and service life shortened. If the pure sine wave power inverter is connected in parallel, generating capacity will become increasingly smaller, machine downtime; For tandem structure will result in an explosion. There is only SMA, Siemens thin-film capacitors, China TBEA used only film capacitors, stable performance and long service life up to 25 years, however, the cost is 15% higher than the resistance and capacitance.

There are many industry insiders believe that film capacitors in 2012 the new, high-power device application time is even shorter, while electrolytic capacitors have decades of history, in the application in terms of the absolute is mature.

In addition, UPS inverter http://www.gridtiepowerinverteronline.com/ voltage across the performance is not very good in addition to, but also more delicate, more suitable for the temperature pleasant air-conditioned rooms, however, place the inverter room temperature often reaches 40 to 50 degrees, in terms of its is a big challenge. Many domestic inverter manufacturers, intense competition, the manufacturers in order to occupy a place in the market, playing the price war, in pursuit of profits, many companies exaggerate the wattage, and cut corners.

Inverter price war caused industry to vicious competition

Inverter PV plant as a core power device, based on the current average cost of photovoltaic power plant construction to count, the inverter of the total cost of photovoltaic power plants 6% to 8% (1MW system cost about 10 million yuan). Multi-author learned that the domestic large-scale 500kW inverter price, overall market prices in June from 0.6 to 0.7 yuan / W or so, the current high-power inverter with prices from 0.4 to 0.6 yuan / W, between 0.5 Yuan / W for the benchmark fluctuations. Small power inverter prices at 2 yuan / W or so, prices are also slow down.

The industry veteran, said inverter decline in product prices will be a trend, which originated irreplaceable raw materials, large-scale production and product design to enhance the level. We must dialectically decline in the cost of such phenomena, for any one industry, the lower the price the market is conducive to further expand the scale, is conducive to the rapid development of the whole industry. Because inverter prices fall, reducing the investment cost of photovoltaic power plants, photovoltaic power plants to enhance the return on investment.

Meanwhile, the cost reduction and the inverter fierce competition between manufacturers, encourage enterprises to continuous technological innovation, improve management and operational capabilities. Of course, making the inverter prices declining corporate profits for R & D investment will be a certain degree of restraint, the long run is not conducive to the development of enterprises. Overall, the invertertechnology is still in a relatively developed stage has for many manufacturers in terms of development opportunities, but you can be sure that eventually have the technical and cost advantages of the enterprises in the future photovoltaic feast will win.

China manufacture inexpensive, has been corporate competitive advantage in the international arena is one important factor. However, this trend is a shift, once the PV bid "low bidder" phenomenon has disdain for the mainstream market, the final cut-throat who can not walk long. I consulted on this issue Sunshine Power Beijing Branch Vice President Daijun Zhen, he said that the current power inverter sun more than 70% of the raw materials are imported, the price decline was not much room. As the market develops, the inverter rationalize the prices, profit margins also tend to normalize.

In the strength of powerful large enterprises who could barely see the price war also can not smell the color and taste, but for that part of the terms of scale, technology or R & D are relatively weak off grid inverter enterprises, experienced a battery a new pattern sheet assembly plant after the change, they will face the risk of bankruptcy, which allows the inverter to industry restructuring and work will become more standardized and mature.

Six of distributed photovoltaic power generation project bidding process

In a distributed photovoltaic power gridbid for specific processes, the project Owner of concern are:

1 project owners to help fill out the form by the power companies, but the owners fill their own needs best understanding of the content, while residents to apply for the owners as well as the need to provide a copy of my ID card, household, real estate license and other documents; owners of the best business consulting in advance to the grid, to understand clearly.

(2) If the residents are occupied by the owners of the project area of public space, but also need to provide the applicant and where the unit of all households in writing signed certification (including the signature of all participants, telephone number, ID number) and where the residential property owners' committee proof of consent by the stamp in their neighborhood communities.

3 When the power grid enterprise access solutions prepared after completion, the project owner to inform as soon as possible whether they can accept the power companies have raised objections as early as possible, as this may affect the construction schedule.

4 before the construction of the project, residents of the owners also need to prepare the right size photovoltaicpanels, it is best unified specifications, the same power, according to the project capacity options matching inverter, inverter to the metering device connection cable, installation support concrete barrier, tripod and other infrastructure, and power companies will be provided free metering device.

5 In the project construction, the project owner in the construction process, construction equipment, quality, relevance, access parameters and other indicators of implementation of the program must be in accordance with any questions should be timely communication with the grid companies to prevent the occurrence of the phenomenon need to rework, to avoid waste of manpower, material and time.

6 project owners in completing the application commissioning and acceptance of the application form, you can request assistance in completing the grid enterprises.

ABB solar inverters wantonly plant expansion in India

ABB company said that the rehabilitation of the production line running, has received the first order, ie 200MW photovoltaic inverter orders.

The end of 2012, ABB's inverter PVS800 series product line has been officially running in Bangalore, India, this entry lines produced by inverter switching current average power of more than 500MW.

Indian PV market is the world PV market one of the fastest progress. The Government of India PV market development and strive to make it more robust, thereby ABB company to expand production.

Since the end of 2011, India has more than 10MW installed by ABB inverter. In the latest after the order, ABB's inverter installation in India is growing rapidly. Installing ABB's inverter is one of India's largest factory is mainly responsible for engineering, procurement and construction contractor, is about 60MW.

ABB's inverter series, the power 100MW to 630MW in between, in order to meet the photovoltaic factories, large commercial and industrial buildings are required to install the PV inverters of differentpower requirements.

Sunshine PV power plant to provide power supply for the inverter Greece

2011, China's largest PV inverter suppliers Sunshine Power Co., Ltd. and EPC service provider Aktor SA jointly built in Greece is expected to exceed 30MWp photovoltaic power plants.

All this 30MWp PV power plant commissioned by Aktor installation, sun power supply 500KW, 630KW of transformerless central inverters.

The off grid inverter has received TÜV certificate, by virtue of its high DC voltage, overload capacity, high and low temperature flexibility, electromagnetic compatibility the German Energy and Water Association awarded the certificate.

The person in charge of its global operations Aris Polychronopoulos said, "sunshine power for us to provide high quality, cost effective products and quite excellent service and we will certainly continue to work with on a global scale sun power cooperation."

Sunshine Power vice president Wang Weijun said, "until the end of 2012, we have deployed in Europe by about 650 MW. Despite the financial crisis, sun power is ready to provide cost-effective, large-scale photovoltaic power generation solutions. "

Sun power has not yet announced how many plants such as the construction, construction and completion dates, location and other details of Greece.

Three crystal grid inverter used in Hunan's first PV roof project

In mid-March, is located in Changde City, Hunan Changde Wuling Road, Elite Langzhou computer network limited liability company in its corporate roof installed a small photovoltaic systems. System capacity of 1.8kWp, by the 10 components, and a 180W polycrystalline grain from the three new energy supplied Sununo-TL3KB the single MPPT inverter components.

As the system is used to meet the daily use of electricity, and the system capacity is too small, so every day is basically all of the electricity used in the daytime corporate office electricity. According to the company official Zhang said that at present only 10 first installed component test, if the result is good, follow-up will increase the system's capacity.

As of today, the system has been in operation for 10 days. Although recent local weather overcast eyes uncertain, but three new energy crystal Webserver monitoring data as long as the weather is nice you can see, this 1.8kWp photovoltaic generating capacity of small systems one day can reach a maximum of about 10 degrees around. And this system daily The electricity can all be used in the office during the day and electricity.

Zhang, at present the system is first used in office buildings, Hunan small PV rooftop power projects. It is understood, Hunan radiation intensity and sunshine hours are in three areas, the average daily PV effective illumination time in 4-5 hours or so, in theory 2kWp installed capacity of electricity to around 8 degrees hair every day, for an ordinary the family is basically to meet the daily demand for electricity.

Undoubtedly, the successful application of the system will give local residents and businesses call for the role of a good publicity, through the company's practices, so that more people are aware of the surrounding PV is not only green but also to bring a small gain. Families with respect to grid-connected photovoltaic systems, photovoltaic http://www.gridtiepowerinverteronline.com/ systems commercial use value will be higher. Because of the company's peak is usually during the day, while the PV system generated electricity during the day just to be directly used in the company office equipment electricity, excess electricity can be fed into the grid, which truly reflects the PV value.

Family of small PV plant to promote energy revolution

Discipline tiger, Songjiang Jiuting Sanshenggong Yijingyuan first floor tenants, a small power plant built in the sixth floor of the roof, using "micro-inverter system" by the 10 250-watt solar panels, 10 micro-inverter constitute by a professional construction company, the use of crane equipment onto the floor, and only then, a total cost of 25,000 yuan.

Chen Jilin, living in Qibao Vanke three detached villas, 11 photovoltaic panels replaced the top floor awning position, power generation I'll shade. This "string system" a person by his equipment procurement, transportation, installation, spent nearly 20,000 yuan.

They are also the photovoltaic gridtiepowerinverteronline industry practitioners, also hopes to use green energy to reduce household electricity expenditure to personal experience has been modeled, so that solar green electricity into people's homes.

Chen Jilin put 11 1.6 m × 1 m, a total power of 2650 watts of solar panels on the top floor awning shop location, clever use of space, a full set of equipment made by him a DIY person. January 5 grid ago, generated a total of 520 degrees. He estimated that the annual electricity generation 2600 degrees is not a problem. Solar power was significantly affected by the weather: "winter light is weak, the power generation efficiency is poor, but the situation improved after the spring equinox Air pollution also have an impact on electricity generation, under the rain, snow, power generation efficiency; PM2.5 index increased generating capacity will be reduced. "

Reporters learned that, 3,4,9,10 months is the generating capacity of more months, crude doing, you can send the annual average 10 kWh per day, enough for the average families occupied it. Of course, this is only a theoretical self-sufficiency, if you encounter continuous cloudy, still need to use the power grid. For example, on March 13 was a rainy day, party tiger "small power plant" is just 2 degrees generating capacity, March 15 is the sunny day, made a 13.26 kWh. As a result, good weather surplus electricity generated benefits, may be offset by the cost of using the power grid.

Currently, Shanghai Power Grid Company has a policy for users to install photovoltaic power meter with two-way metering function, to ensure that users from reading and normal use of electricity generating accurate readings, according desulfurization price subsidies, and other policies after the NDRC for Duotuishaobu . Discipline tigers and Chen Jilin Yu has recently received 196 yuan, respectively, and 116 yuan subsidy costs. Small power plants to discipline tiger example, the design life of 25 years, 5-8 years will be able to recover the cost, and the remaining ten years of all "net" period, is indeed not a small temptation.