Recently, the international authoritative testing and certification organization UL to independent research and the North American version 500KW inverter TBEA New Energy Company awarded UL certification, which is the Asia-Pacific region's first high-power inverters are UL certified, marked "Made in China "elevate the status of the world in the photovoltaic industry.
It is understood that TBEA new disposable inverter products certified by UL, UL approved earlier by the first laboratory was completed. UL side, said: "This collaboration with TBEA very happy, hope for the future to have more opportunities for cooperation, and strive for the global PV industry to bring the best products."
UL is a very experienced international authority on testing and certification organization, the one-time effectively promote the company's products quality improvement and overseas markets through the UL certification. Currently TBEA inverter steady growth in market share at home and abroad, TBEA New Energy Company will take the UL certification to provide more differentiated products and services to the world, to strengthen the manufacturing China in the international arena of new energy status, access to world industry recognition.
Wednesday, 12 November 2014
Container inverter solutions become mainstream trend
The inverter is a key component of photovoltaic power plants, photovoltaic power plants in the outbreak of the global growth in recent years, container type inverter solutions quickly become the market mainstream applications. So the question is, why is containerized inverter solution?
First, the cost efficiency is king, market selection is the first standard
Early large-scale power plants commonly used self-built cement room in the form of built-in inverter. Although the strength of the cement room and meet the requirements of life, but a long construction period, the project takes up a lot of time; large-scale photovoltaic power plants are mostly located in the desert plateau, high labor costs, difficult construction, building materials, transportation difficulties, resulting in cement room the overall construction costs are generally higher. Long construction period, high construction costs, in order to ensure construction quality and progress of the project, the owners of units had to arrange to hire professionals for guidance or supervision of the company on behalf of supervision.
The reason why the container program a launch on the market quickly, the primary reason is that the program works in construction time and cost advantages. Mainstream containerized general internal configuration of the inverter room 2 500KW inverter, depending on the requirements of owners can be further integrated DC power distribution cabinets and other equipment to form an independent photovoltaic power generation system unit. In addition to the simple ground and foundations, container program no other construction needs, by lifting directly placed in designated locations, good to meet the owners and EPC unit construction period of the project and the project cost requirements, and greatly reduces the difficulty of construction site risks .
Second, the integration of functional design, from products to solutions platform upgrade
Photovoltaic power plants of different application environment, to meet the cooling ventilation premise, inverter room needs to have good dustproof, waterproof, anti-corrosion ability. Container inverter room, the heat, protection and other functions to achieve the combination of inverter products, and provide owners with a personalized interior space, form an integrated functional design of the PV system access solutions platform. Container with sun power inverter example for analysis.
Sunshine Power Inverter containerized housing will inverters, DC cabinet integrated in one, using simple segmented vertical-type duct, the duct-free fan, zero loss, maintenance-free. Duct length is only 1m, small pressure loss, fan efficiency at its best state. Inverter at work, most of the heat is discharged through the duct outside the container, but also a part of the heat transferred by radiation inside the box, the internal flow of air to absorb heat to the top, and then discharged from the top of the container exhaust fan, ensures the inverter the long-term reliable operation.
Outside exhaust treatment, the same treatment should be integrated into the design of the wind. In addition the container side of the blinds, external cold air directly into the box by the side of the window, continuous flow in the back of the inverter, inverter heat way back from the original natural convection transformed into forced convection, convection heat transfer factor improved by nearly 10 times, greatly improving the heat transfer capability back, reducing the surface temperature; Moreover, persistent low level cold air formed around the inverter to inverter provides a good working environment.
Surrounding the container body additional insulation, the use of low thermal conductivity as rock wool insulation materials, laminated thickness of 50mm, can be effectively cut off from solar radiation and low temperature environment better insulation. S-shaped inlet box blinds patented design, effectively prevent the intrusion of wind and rain, dust and cotton are using a special high-throughput and low resistance filter cotton, reusable, simply press the blinds when replacing a dark button, you can remove the anti-cotton dust, the whole operation time is less than a few seconds.
In addition to cooling, insulation, protection of the integration of professional design, maintenance facilities also need to include the container platform design. Sunshine Power Inverter Built Container 500KW inverter and DC cabinet, using midline symmetrical placement to facilitate people to view device information and positive maintenance; inverter front door can be opened 160 °, which greatly improves the maintenance space; both sides of the container design the overall style double doors, providing a fast and convenient service channels, For large devices within the inverter to be replaced, the back double doors can be opened directly.
Not only in the photovoltaic industry and the power industry, as the global standardization of the large container, the container industry applications for the same program in multiple platforms.
Communications industry in the data center container originated from Sun in 2006's "black box scheme", which uses a standard 20-foot container, placed inside the server and power supply equipment, the obvious advantages of this design, and soon became the industry hot, now, IBM, HP, Google, Cisco, Microsoft and other giants have set foot (Figure 4), the product is used around the world, including deserts, coastal areas, its application is similar to the photovoltaic products.
Power industry, such as: electrical equipment manufacturer ACTIVEPOWER company, the battery manufacturer SAFT Group, and also a few years ago to join the ranks of containerization, which PowerHouse is ACTIVEPOWER company's major box-power products.
PV industry, SMA, Siemens and other foreign brands in 2009 began the introduction of container products, and widely used around the world. With significant cost advantages, construction efficiency and program platforms, with further expansion of photovoltaic power plant market, the scope of containerized inverter will be broader.
First, the cost efficiency is king, market selection is the first standard
Early large-scale power plants commonly used self-built cement room in the form of built-in inverter. Although the strength of the cement room and meet the requirements of life, but a long construction period, the project takes up a lot of time; large-scale photovoltaic power plants are mostly located in the desert plateau, high labor costs, difficult construction, building materials, transportation difficulties, resulting in cement room the overall construction costs are generally higher. Long construction period, high construction costs, in order to ensure construction quality and progress of the project, the owners of units had to arrange to hire professionals for guidance or supervision of the company on behalf of supervision.
The reason why the container program a launch on the market quickly, the primary reason is that the program works in construction time and cost advantages. Mainstream containerized general internal configuration of the inverter room 2 500KW inverter, depending on the requirements of owners can be further integrated DC power distribution cabinets and other equipment to form an independent photovoltaic power generation system unit. In addition to the simple ground and foundations, container program no other construction needs, by lifting directly placed in designated locations, good to meet the owners and EPC unit construction period of the project and the project cost requirements, and greatly reduces the difficulty of construction site risks .
Second, the integration of functional design, from products to solutions platform upgrade
Photovoltaic power plants of different application environment, to meet the cooling ventilation premise, inverter room needs to have good dustproof, waterproof, anti-corrosion ability. Container inverter room, the heat, protection and other functions to achieve the combination of inverter products, and provide owners with a personalized interior space, form an integrated functional design of the PV system access solutions platform. Container with sun power inverter example for analysis.
Sunshine Power Inverter containerized housing will inverters, DC cabinet integrated in one, using simple segmented vertical-type duct, the duct-free fan, zero loss, maintenance-free. Duct length is only 1m, small pressure loss, fan efficiency at its best state. Inverter at work, most of the heat is discharged through the duct outside the container, but also a part of the heat transferred by radiation inside the box, the internal flow of air to absorb heat to the top, and then discharged from the top of the container exhaust fan, ensures the inverter the long-term reliable operation.
Outside exhaust treatment, the same treatment should be integrated into the design of the wind. In addition the container side of the blinds, external cold air directly into the box by the side of the window, continuous flow in the back of the inverter, inverter heat way back from the original natural convection transformed into forced convection, convection heat transfer factor improved by nearly 10 times, greatly improving the heat transfer capability back, reducing the surface temperature; Moreover, persistent low level cold air formed around the inverter to inverter provides a good working environment.
Surrounding the container body additional insulation, the use of low thermal conductivity as rock wool insulation materials, laminated thickness of 50mm, can be effectively cut off from solar radiation and low temperature environment better insulation. S-shaped inlet box blinds patented design, effectively prevent the intrusion of wind and rain, dust and cotton are using a special high-throughput and low resistance filter cotton, reusable, simply press the blinds when replacing a dark button, you can remove the anti-cotton dust, the whole operation time is less than a few seconds.
In addition to cooling, insulation, protection of the integration of professional design, maintenance facilities also need to include the container platform design. Sunshine Power Inverter Built Container 500KW inverter and DC cabinet, using midline symmetrical placement to facilitate people to view device information and positive maintenance; inverter front door can be opened 160 °, which greatly improves the maintenance space; both sides of the container design the overall style double doors, providing a fast and convenient service channels, For large devices within the inverter to be replaced, the back double doors can be opened directly.
Not only in the photovoltaic industry and the power industry, as the global standardization of the large container, the container industry applications for the same program in multiple platforms.
Communications industry in the data center container originated from Sun in 2006's "black box scheme", which uses a standard 20-foot container, placed inside the server and power supply equipment, the obvious advantages of this design, and soon became the industry hot, now, IBM, HP, Google, Cisco, Microsoft and other giants have set foot (Figure 4), the product is used around the world, including deserts, coastal areas, its application is similar to the photovoltaic products.
Power industry, such as: electrical equipment manufacturer ACTIVEPOWER company, the battery manufacturer SAFT Group, and also a few years ago to join the ranks of containerization, which PowerHouse is ACTIVEPOWER company's major box-power products.
PV industry, SMA, Siemens and other foreign brands in 2009 began the introduction of container products, and widely used around the world. With significant cost advantages, construction efficiency and program platforms, with further expansion of photovoltaic power plant market, the scope of containerized inverter will be broader.
Tuesday, 11 November 2014
Component quality determines income generation photovoltaic power plants for 25 years
As the size and number of PV power plant increases every year, and now the owners are more concerned about how to improve the operation and maintenance of power plants the way through testing and quality assessment, and ultimately to increase the generating capacity of the power station. Thus, to ensure the quality of photovoltaic power plants has become a topic of concern. October 31, 2014 China Machinery Industry Federation, China held a PV power plant performance testing and quality assessment technology seminars to discuss the challenges for the development of power plant industry to bring quality.
There are three main power plant quality concerns, first ensure that power generation, and second, the reliability and the third is the operation and maintenance. In fact, on the road of integrating PV and capital, equity financing, including photovoltaic power plants, financial analysis, property transactions, insurance etc require a complete power plant quality assessment. As for the quality of photovoltaic power plants, and now the whole industry has developed a number of standards, such as components associated components, parts, etc. have balanced the relevant standards, maturing. But after the completion of the final power plant, how to evaluate the quality of power stations still do not have a unified standard.
In view of this situation, the US Energy Foundation supports a project undertaken by the Institute of Electrical Engineering Testing Center photovoltaic technology research group established a standard system of large-scale photovoltaic power plants, and to develop grid-connected photovoltaic power plant performance testing and quality assessment of technical specification standards .
However, on the other hand, the standard is just a macro inspection, testing standards should be more professional and refined some. Detection of a third party can not be completely representative of the quality, micro-monitoring system itself or to rely on technology to be realized.
For example, components, assemblies PV power plant is the highest part of the cost, price competition in order to seek to reduce the cost of market environment, the quality has become necessary to maintain the supply and demand sides of the bottom line.
In recent years, various parts of the PV installed capacity increasing, component quality problem ensues. Assembly problem is not confined to cells, but also involves a variety of packaging materials components, such as auxiliary junction box. Different quality grades of material, will bring a different quality components that determines the price of the component. So, the blind pursuit of component costs would cost pressures in all aspects of the industry chain to continue conducting it. In other words, the quality of the components generating revenue directly determines the photovoltaic power plant operation period of 25 years.
Thus, the focus of photovoltaic power plants should be more focus on the quality of the product life cycle of 25 years of reliability, and enter a dynamic quality testing phase.
For power plant quality assurance methods,we must first have a professional quality management team, technical innovation and intelligence can solve most problems; secondly, to establish from the relevant standards for manufacturing, installation, operation and maintenance as well as power plants; and third , manufacturing companies must do their own reliability testing; fourth, it is the technological innovation intelligent.
There are three main power plant quality concerns, first ensure that power generation, and second, the reliability and the third is the operation and maintenance. In fact, on the road of integrating PV and capital, equity financing, including photovoltaic power plants, financial analysis, property transactions, insurance etc require a complete power plant quality assessment. As for the quality of photovoltaic power plants, and now the whole industry has developed a number of standards, such as components associated components, parts, etc. have balanced the relevant standards, maturing. But after the completion of the final power plant, how to evaluate the quality of power stations still do not have a unified standard.
In view of this situation, the US Energy Foundation supports a project undertaken by the Institute of Electrical Engineering Testing Center photovoltaic technology research group established a standard system of large-scale photovoltaic power plants, and to develop grid-connected photovoltaic power plant performance testing and quality assessment of technical specification standards .
However, on the other hand, the standard is just a macro inspection, testing standards should be more professional and refined some. Detection of a third party can not be completely representative of the quality, micro-monitoring system itself or to rely on technology to be realized.
For example, components, assemblies PV power plant is the highest part of the cost, price competition in order to seek to reduce the cost of market environment, the quality has become necessary to maintain the supply and demand sides of the bottom line.
In recent years, various parts of the PV installed capacity increasing, component quality problem ensues. Assembly problem is not confined to cells, but also involves a variety of packaging materials components, such as auxiliary junction box. Different quality grades of material, will bring a different quality components that determines the price of the component. So, the blind pursuit of component costs would cost pressures in all aspects of the industry chain to continue conducting it. In other words, the quality of the components generating revenue directly determines the photovoltaic power plant operation period of 25 years.
Thus, the focus of photovoltaic power plants should be more focus on the quality of the product life cycle of 25 years of reliability, and enter a dynamic quality testing phase.
For power plant quality assurance methods,we must first have a professional quality management team, technical innovation and intelligence can solve most problems; secondly, to establish from the relevant standards for manufacturing, installation, operation and maintenance as well as power plants; and third , manufacturing companies must do their own reliability testing; fourth, it is the technological innovation intelligent.
SunPower to acquire SolarBridge to develop the next generation of AC component products
Mainstream SunPower photovoltaic energy suppliers will acquire a US small-cap micro-inverter company SolarBridgeTechnologies, the amount has not been announced.
According to SunPower, specializing in integrated micro-inverter technology, SolarBridge SunPower's technology uses highly efficient components for residential and commercial rooftop markets, will be able to develop operational.
CormacGilligan IHS senior analyst, said in an interview: "In 2013 the revenue side, SolarBridge is the third largest supplier of micro inverter since early 2013, it has expanded beyond the United States, access to international markets, made in Australia. some success. "
IHS expects significantly lower due to AC component "soft costs" such as a large proportion of the labor force is currently in the United States overall system cost, which will be the fastest growing micro-inverter type, the annual growth of over 100% in 2018 reach 800MW or more.
SunPower will acquire a US small-cap micro-inverter company SolarBridgeTechnologies, the amount has not been announced
SolarBridge week in October SolarPowerInternational stressed that it has to choose the United States conducted a survey installers, noting that due to the vast selection of hardware on the market, for the installer to select the best application in terms of the technical aspects, challenges.
SolarBridgeTechnologies Bill Mulligan, president and CEO, in a statement during SPI, said: "Today's installers face of the modules, inverters power electronics technology in the field and a lot of hardware options .SolarBridge customers have been telling us, by virtue of their TRUEAC components to achieve significant cost savings, and this study aims to clarify the decisions entrusted soft costs associated with the hardware. "
Mulligan added: "The installer told us that it is no exaggeration to say that without the use of micro-inverter or AC components, they will inevitably be a quarter of the unemployment rate which emphasizes the AC photovoltaic technology makes installation business more. obvious advantages productivity and profitability aspects. "
However, according to a report earlier GTMResearch 2014, the PV inverter market competition is intensifying, and the integration is in progress.
Senior analyst and author of the report GTMResearch of MJShiao said: "Although there are many companies attacks MLPE (component-level power electronics) in the field, but the three companies --Enphase, SolarEdge and Tigo-- accounted shipments and market share of total installed capacity more than 93%, Enecsys, SolarBridge, PetraSolar and others far behind. first-mover advantage has enabled the participants reached an important development and distribution partnerships, and later to gain significant market traction before. However, we expect changes appear in the rankings, especially since the conventional inverter companies such as SMA and Power-One, continue to develop and promote their own MLPE product. "
In fact, SMASolar has slowed the development of its own micro-inverter technology, and to withstand a late market entry. SunPower has long been in their installers for large US base system (Kit) product supply, use SMASolar renamed string inverters.
IHS's Gilligan added:. "Between the US housing market large installers / EPC and BOS providers, there are many examples of vertical integration, as happened last year Solarcity acquisition ZepSolar these major concern in lower installation costs .IHS expected since suppliers continue to seek to optimize their supply complete systems and simplify its route to market, this trend will continue in 2015 and further. "
SunPower PV modules for its own direct purchase and development of power electronics technology, a move in the coming years in terms of business for SMASolar could be a hit. SMASolar has been struggling in the fierce competition, and the loss of market share.
SunPower also with SolarCity and Vivint and other companies in the US housing market competition, SolarBridge competitors include leading micro-inverter company Enphase, the company is the provider of these types of PV installed a major supplier.
SunPower President and CEO Tom Werner, said: "SunPower acquisition SolarBridge its high-performance micro inverter technology that will allow us to develop a differentiated product, specifically optimized for our highly efficient solar panels which are integrated. electronic beginning to our world-class solar panel technology. in this case, the result of the merger will provide our residential customers a simple, reliable and complete solution for their family size, including a flexible system design resistance, ease of installation and maintenance, and improves the overall appearance. "
SunPower was founded in 2004, has about 70 five employees. The company has a SunPower as an existing customer, the customer also includes joint venture manufacturing partners and component manufacturer BenQ ETSolar.
Sunday, 9 November 2014
Gobi landscape: in the PV base into the green image
Golmud City, east exit ambitious photovoltaic parks, neat rows of spruce, poplar along the photovoltaic park road stretching several kilometers on both sides, for the vast Gobi adds vitality and vigor, become a unique landscape.
In recent years, the city of Golmud thoroughly implement the provincial government to work on the photovoltaic industrial park greening policies and arrangements, timely establishment of the leadership team, clear responsibilities, detailed work, to promote the greening of photovoltaic industrial park work. Photovoltaic Industrial Park each enterprise initiative to take responsibility, establish environmental awareness, strengthen post-maintenance, management, consolidate achievements green park.
It is reported that in 2014 the park greening project invested 110 million yuan (provincial, state and municipal financial investments), and completed the afforestation 8300 acres. Through work in recent years, the foundation has been formed here shelterbelts surrounding green frame, with the ongoing work in the future greening, will be a radical improvement in the photovoltaic industry park only sand yellow, green tree seen the face of the future of photovoltaic industrial park will achieve ecological photovoltaic, green PV. This reporter recently in a leading Golmud Photovoltaic Industrial Park Industrial Park and shot a few scenes.
Go green Golmud Photovoltaic Park Avenue for entering the photovoltaic power plant on the road adds a new vigor and vitality.
Photovoltaic Industrial Park Area greening forthcoming.
Photovoltaic Industrial Park has been completed greening Area.
In recent years, the city of Golmud thoroughly implement the provincial government to work on the photovoltaic industrial park greening policies and arrangements, timely establishment of the leadership team, clear responsibilities, detailed work, to promote the greening of photovoltaic industrial park work. Photovoltaic Industrial Park each enterprise initiative to take responsibility, establish environmental awareness, strengthen post-maintenance, management, consolidate achievements green park.
It is reported that in 2014 the park greening project invested 110 million yuan (provincial, state and municipal financial investments), and completed the afforestation 8300 acres. Through work in recent years, the foundation has been formed here shelterbelts surrounding green frame, with the ongoing work in the future greening, will be a radical improvement in the photovoltaic industry park only sand yellow, green tree seen the face of the future of photovoltaic industrial park will achieve ecological photovoltaic, green PV. This reporter recently in a leading Golmud Photovoltaic Industrial Park Industrial Park and shot a few scenes.
Go green Golmud Photovoltaic Park Avenue for entering the photovoltaic power plant on the road adds a new vigor and vitality.
Photovoltaic Industrial Park Area greening forthcoming.
Photovoltaic Industrial Park has been completed greening Area.
Photovoltaic Market Efficient Become a trend，Monocrystalline expected to reduce the cost 40%
Which polysilicon and monocrystalline silicon strong? This is the field of solar energy component indisputable technology, has a direct impact on the industry trends, industry has recently become a hot topic. In the past few years, the polysilicon product by means of cost advantages, the development of the domestic photovoltaic applications into the mainstream market. But there are indications that monocrystalline silicon products is pregnant with a very strong explosive.
Election chaos under the polysilicon industry
High conversion efficiency is the only way out of the solar industry, if not the efficiency of the post, industry will have no future. Low solar energy density, light energy is very high collection costs, the cost of solar power plants in the glass, frame, back, aluminum frame and other very large proportion of these traditional materials, and in the course of hundreds of years of development, the cost of these materials fall the range is limited, so the proportion of solar energy in the energy sector in order to improve, we must improve the conversion efficiency and reduce collection costs. Only conversion rate, power output increased to reflect the economics of photovoltaic power generation.
Technically speaking, silicon single crystal structure of the components due to its high material purity, low resistance, high photoelectric conversion efficiency, the operating temperature lower than silicon components. Therefore, under the same conditions, the higher the power of the same nominal power output of monocrystalline silicon component, and the decay rate of the single crystal silicon is less than the product of polysilicon, its higher stability.
Earlier, a large-scale photovoltaic power plant quality survey organized by the China Financial Leasing Co., show that about 30 percent over three years to build power plants in varying degrees of quality problems, and even built three years but PV power plant components decay rates as high as 68%.
But why is the mainstream of the market polysilicon? One impetus terminal lack of monocrystalline silicon market, resulting in the industry's lack of understanding, speaking monocrystalline polycrystalline construction costs than the more expensive per W from the appearance, but the actual per W, Judging generation monocrystalline not expensive. . Second, because most domestic battery manufacturers have a polycrystalline ingot production capacity, for pulling his chain, active sales of polysilicon products, channels and wider. Third Monocrystalline technical requirements, long production cycle, only a handful of companies have inventories, such as the occurrence grab installed by the end, it is difficult to form an effective supply of monocrystalline silicon products. .
This is China's new energy market development, especially the development of the PV market chaos, the threshold is low, the quality standards are not clear. Part of the power plant builders do not want to really hold power station, so driven by the interests, reduce costs choose low-quality components, which also appeared in some of the low-quality plants.
Monocrystalline expected future cost reduction 40%
Monocrystalline and polycrystalline silicon which is expensive? A power plant investment sources, investment watt power plant to see the system indicators, that is, after completing construction of the entire power plant system, in terms of cost per watt is how much money. So now integrated to build a ground station to count all costs, polycrystalline or monocrystalline lower than that, and this is the main reason they chose polycrystalline.
In fact, with the continuous improvement of monocrystalline silicon technology, we are using diamond wire cutting and continuous feeding Czochralski method, the cost difference between the single crystal silicon and polycrystalline silicon sheet is shrinking, combined with efficient monocrystalline silicon component also can significantly reduce BOS cost of the system, which will save the total cost of system installation. The decline in the cost of polysilicon manufacturing space is relatively limited.
From a global perspective, high efficiency solar module products become mainstream. March 21 this year, the product of many years of production of polycrystalline Kyocera announced the new monocrystalline module products in response to market demand for high conversion efficiency of the product; this year June 17, Tesla's another head Maske star Enterprise Sun City (Solarcity) announced the acquisition of a single crystal component manufacturers Cylons electricity, and plans the next two years in New York annual production capacity of more than 1GW of module production capacity. In addition, the N-type monocrystalline global enterprises Sunpower also introduced this year expansion plan, annual production capacity expected to 2015,2016 upgrade from the current 1.2GW to 1.4GW, 1.8GW; MissionSolar crystal battery manufacturers and the world's largest supplier of silicon wafers GCL also announced expansion plans crystal products.
Election chaos under the polysilicon industry
High conversion efficiency is the only way out of the solar industry, if not the efficiency of the post, industry will have no future. Low solar energy density, light energy is very high collection costs, the cost of solar power plants in the glass, frame, back, aluminum frame and other very large proportion of these traditional materials, and in the course of hundreds of years of development, the cost of these materials fall the range is limited, so the proportion of solar energy in the energy sector in order to improve, we must improve the conversion efficiency and reduce collection costs. Only conversion rate, power output increased to reflect the economics of photovoltaic power generation.
Technically speaking, silicon single crystal structure of the components due to its high material purity, low resistance, high photoelectric conversion efficiency, the operating temperature lower than silicon components. Therefore, under the same conditions, the higher the power of the same nominal power output of monocrystalline silicon component, and the decay rate of the single crystal silicon is less than the product of polysilicon, its higher stability.
Earlier, a large-scale photovoltaic power plant quality survey organized by the China Financial Leasing Co., show that about 30 percent over three years to build power plants in varying degrees of quality problems, and even built three years but PV power plant components decay rates as high as 68%.
But why is the mainstream of the market polysilicon? One impetus terminal lack of monocrystalline silicon market, resulting in the industry's lack of understanding, speaking monocrystalline polycrystalline construction costs than the more expensive per W from the appearance, but the actual per W, Judging generation monocrystalline not expensive. . Second, because most domestic battery manufacturers have a polycrystalline ingot production capacity, for pulling his chain, active sales of polysilicon products, channels and wider. Third Monocrystalline technical requirements, long production cycle, only a handful of companies have inventories, such as the occurrence grab installed by the end, it is difficult to form an effective supply of monocrystalline silicon products. .
This is China's new energy market development, especially the development of the PV market chaos, the threshold is low, the quality standards are not clear. Part of the power plant builders do not want to really hold power station, so driven by the interests, reduce costs choose low-quality components, which also appeared in some of the low-quality plants.
Monocrystalline expected future cost reduction 40%
Monocrystalline and polycrystalline silicon which is expensive? A power plant investment sources, investment watt power plant to see the system indicators, that is, after completing construction of the entire power plant system, in terms of cost per watt is how much money. So now integrated to build a ground station to count all costs, polycrystalline or monocrystalline lower than that, and this is the main reason they chose polycrystalline.
In fact, with the continuous improvement of monocrystalline silicon technology, we are using diamond wire cutting and continuous feeding Czochralski method, the cost difference between the single crystal silicon and polycrystalline silicon sheet is shrinking, combined with efficient monocrystalline silicon component also can significantly reduce BOS cost of the system, which will save the total cost of system installation. The decline in the cost of polysilicon manufacturing space is relatively limited.
From a global perspective, high efficiency solar module products become mainstream. March 21 this year, the product of many years of production of polycrystalline Kyocera announced the new monocrystalline module products in response to market demand for high conversion efficiency of the product; this year June 17, Tesla's another head Maske star Enterprise Sun City (Solarcity) announced the acquisition of a single crystal component manufacturers Cylons electricity, and plans the next two years in New York annual production capacity of more than 1GW of module production capacity. In addition, the N-type monocrystalline global enterprises Sunpower also introduced this year expansion plan, annual production capacity expected to 2015,2016 upgrade from the current 1.2GW to 1.4GW, 1.8GW; MissionSolar crystal battery manufacturers and the world's largest supplier of silicon wafers GCL also announced expansion plans crystal products.
Friday, 7 November 2014
how to improve the quality of photovoltaic power plants
2014, the policy was adjusted to all electricity subsidies, and subsidies for electricity is relatively stable after upgrading the quality of photovoltaic power plants becomes urgent. EPC as power plants to control the quality of the core, you need to assume sufficient responsibility to the industry in order to establish confidence. Specifically, the following:
1, do firmly EPC
EPC refers to the design, procurement and installation of the general contractor, and are split to various enterprises to implement its investors before the photovoltaic industry, which led to the final quality no commitment Station. Of course, some investors because of previous industry is relatively new, there are few EPC have a great experience in all aspects, is a last resort. Now, if the EPC or not these three together; or that although consolidation, but the procurement or design choices in the hands of investors, then the power plant quality is really worrying.
We are also pleased to see that there are a few domestic manufacturers began to insist on doing the EPC general contractor, and provides guarantees electricity power stations.
2, power plant construction grading
Build quality photovoltaic power plant to be all of a sudden turn for the better, it seems more difficult, because the mentality of investors is difficult to immediately adjust over. So you do not want to assume the risk if no project to undertake EPC, you need to offer for classification treatment plant construction, and assembly factory grading which is a reason to allow the formation of such an industry standard, and gradually change the mentality of investors;
Of course, some people will say how to set grading standards is a challenge. This is actually quite simple, for investors, concerned with the generation capacity, as long as the level of power output guarantee to measure it. For example, a site with photovoltaic resource maps, for example, on the basis of the maximum power output hit 0.95 fold as Class A; 0.9 fold for Class B; 0.85 for class C; on this basis can also be subdivided. Of course, before the grading offer, the need for land and housing in the survey, as well as understanding the environment and future plans and so on; for example, there is a certain time shadow blocked the project, can commit generating capacity in accordance with the Class B, but pricing is based on A-level to newspaper .
If you worry about the local resources in recent years, changes in irradiance is too large, can be used as a basis for commitment system efficiency based on the measured radiation resources; recommend using a third-party site measurement data, CMA data, and three NASA data as a weighted numerical convergence according to the resource reference value; its weight recommendations were 60%, 20%, 20% (note the same inclination at data components); system efficiency, A, B, C class divide in the eastern region mainly in the 75%, 73% and 70%; mainly in the western region of 80%, 78% and 75% is divided; note system efficiency refers to the cumulative amount of the annual index, on any given day, month or season in efficiency are not the same , without much actual reference value;
3, using the BT model
PV power plant with a general contractor in the background under certain financing to acquire greater autonomy and profit margins (full BT way is to determine the construction side of the project by bidding through the BT model, the construction side set up the project company responsible for the project company financing, investment and construction projects, in the form of repurchase by the owners after the project is completed). The case of photovoltaic power plants as a stable income products, while the EPC for its own technical strength is also confident of taking BT model is the best option.
1, do firmly EPC
EPC refers to the design, procurement and installation of the general contractor, and are split to various enterprises to implement its investors before the photovoltaic industry, which led to the final quality no commitment Station. Of course, some investors because of previous industry is relatively new, there are few EPC have a great experience in all aspects, is a last resort. Now, if the EPC or not these three together; or that although consolidation, but the procurement or design choices in the hands of investors, then the power plant quality is really worrying.
We are also pleased to see that there are a few domestic manufacturers began to insist on doing the EPC general contractor, and provides guarantees electricity power stations.
2, power plant construction grading
Build quality photovoltaic power plant to be all of a sudden turn for the better, it seems more difficult, because the mentality of investors is difficult to immediately adjust over. So you do not want to assume the risk if no project to undertake EPC, you need to offer for classification treatment plant construction, and assembly factory grading which is a reason to allow the formation of such an industry standard, and gradually change the mentality of investors;
Of course, some people will say how to set grading standards is a challenge. This is actually quite simple, for investors, concerned with the generation capacity, as long as the level of power output guarantee to measure it. For example, a site with photovoltaic resource maps, for example, on the basis of the maximum power output hit 0.95 fold as Class A; 0.9 fold for Class B; 0.85 for class C; on this basis can also be subdivided. Of course, before the grading offer, the need for land and housing in the survey, as well as understanding the environment and future plans and so on; for example, there is a certain time shadow blocked the project, can commit generating capacity in accordance with the Class B, but pricing is based on A-level to newspaper .
If you worry about the local resources in recent years, changes in irradiance is too large, can be used as a basis for commitment system efficiency based on the measured radiation resources; recommend using a third-party site measurement data, CMA data, and three NASA data as a weighted numerical convergence according to the resource reference value; its weight recommendations were 60%, 20%, 20% (note the same inclination at data components); system efficiency, A, B, C class divide in the eastern region mainly in the 75%, 73% and 70%; mainly in the western region of 80%, 78% and 75% is divided; note system efficiency refers to the cumulative amount of the annual index, on any given day, month or season in efficiency are not the same , without much actual reference value;
3, using the BT model
PV power plant with a general contractor in the background under certain financing to acquire greater autonomy and profit margins (full BT way is to determine the construction side of the project by bidding through the BT model, the construction side set up the project company responsible for the project company financing, investment and construction projects, in the form of repurchase by the owners after the project is completed). The case of photovoltaic power plants as a stable income products, while the EPC for its own technical strength is also confident of taking BT model is the best option.
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