The hottest photovoltaic industry is intended to s

The photovoltaic industry is intended to start the domestic market, starting with institutional standards

"at present, the photoelectric building application Committee of China building metal structure association is leading more than 50 domestic enterprises, institutions and experts involved in technology, components, materials and other links to prepare the" photoelectric building guidelines ", which will clearly stipulate the relevant concepts and design, construction and other methods of photoelectric buildings." Recently, at the "first solar building materials and components integration technology and Standards Forum" held in Ningguo, Anhui Province, Xiao Pengjun, deputy director of the photovoltaic Laboratory of China building materials inspection and Certification Group, revealed to this newspaper that the "guidelines" will play an important role in the development of the photoelectric building integration market, which has beneficial conditions for China's plastic extruder foreign trade export

at present, China's photovoltaic industry is in difficulties at home and abroad. In order to "rescue the market", relevant national departments have recently made frequent moves to start the domestic photovoltaic market, and the distributed relevant staff must check the different structures and parts of the fatigue testing machine. The photovoltaic application market has become the focus

it is understood that all regions have reported the "implementation plan of distributed photovoltaic power generation demonstration zone" to the national energy department before October 15, in which the photoelectric building integration has become the focus of all regions, and the photoelectric building integration market is showing signs of heating up due to the positive impact of this wave of policies

but up to now, the domestic industry seems to have not completely understood the basic concept of photoelectric building integration, and there is no unified and detailed authoritative annotation. There is no authority to clarify the basic concepts, which undoubtedly reflects the naivety of this emerging industry from one side

optoelectronic building standards will come out

the so-called "no rules, no radius". At present, the domestic optoelectronic building integration market seems to be lacking in the formulation and implementation of rules, that is, standards, and has become an inevitable barrier in the orderly expansion of the market

"at present, the optoelectronic building integration market is still in the early stage of development and faces many problems, but the biggest problem is the standard." Wen Jianhua, CEO of Hunan Gongchuang Photovoltaic Technology Co., Ltd., told this newspaper at the forum

there are not a few people who hold similar views, and the forum organizers seem to be aware of this, focusing one of the forum topics on standards

"there are many applications for relevant standards at the national, industrial and local levels involving optoelectronic building integration, and some have also been implemented, but the specific provisions are vague and superficial, and their guidance is not strong." Luo duo, chief engineer of China industrial solar energy technology Holding Co., Ltd., told this newspaper

according to Rodo, at present, the relevant component standards have been basically improved; The general standard for building photovoltaic has been issued; The relevant BIPV test methods and performance indicators are not perfect; "There are also system standards, but the content is a little shallow"; The technical code for the application of solar photovoltaic systems in civil buildings was also published in 2010, but the content is more related to rooftop power stations and has little reference value for BIPV. Currently, relevant units are preparing to redraft it

in addition, provinces and cities including Fujian, Zhejiang and Guangdong have also formulated local standards related to the integration of optoelectronic buildings. Generally speaking, whether national, industrial or local standards, their content requirements are not harsh, and their main role is to teach people how to do photoelectric buildings. The vast majority of them are guiding standards. There are indeed intersections between standards, and they are relatively scattered. Although a considerable number of standards have submitted approval applications to relevant national departments, there are not many actually approved and implemented

there are many reasons for the above problems. In addition to various cumbersome approval procedures, which are time-consuming, it is also closely related to the existing technology, the level of participating enterprises and insufficient capital investment

"after all, in the process of formulating some standards, a lot of experiments must be done to determine an index, which requires a lot of money, but the source of funds is very problematic." Rodo said

it is the "lag" in the formulation and implementation of standards that makes the whole industry fall into chaos and disorder in the early stage of development. However, in Xiao Pengjun's view, this seems extremely normal: "as an emerging industry, it is reasonable for standards to lag behind. Standards are often gradually improved with the development of the industry."

perhaps to meet the needs of the time, the relevant units are currently formulating the "guidelines for optoelectronic buildings", which is rich in content and seems to draw a clear line for the optoelectronic building integration market

according to Xiao Pengjun, the guidelines first defined the basic definitions of "building material type" and "component type" of optoelectronic building integration

"although many articles have been sent before, and relevant concepts have been mentioned, it is not accurate and clear from a professional point of view, and I can't figure it out now." Xiao said

in addition, the guide also stipulates the design conditions and methods, construction conditions and methods, engineering inspection and acceptance methods, etc. At present, the formulation of the guidelines is in the internal discussion stage of the working group, and will eventually be submitted to the Ministry of housing and urban rural development for approval

the market with high cost is still in the demonstration stage

"the optoelectronic building integration market is still relatively limited. At present, the technology is basically mature. The key is that the construction cost is high and the investment recovery cycle is long." Lu Yufa, general manager of Anhui Tianzhu Green Energy Technology Co., Ltd., said

Rodo said that bapv can usually conduct investment analysis. Generally speaking, the system cost is 10 yuan/watt, while BIPV is difficult to be cost-effective, but the cost must be very high. Generally, the vast majority of owners invest in BIPV not for economic benefits, but for aesthetic or advertising effects. For example, as a landmark demonstration project, as a sign of a place, the actual market scale is very small, which is naturally related to the high cost. Its components and supports are 3 times and 2 times more expensive than ordinary rooftop power stations respectively, while the cost of other BOS (components and system balancing parts) is roughly the same or slightly higher, but a large number of small inverters are used, and their price is much higher than that of large inverters

Luo duo pointed out for example that at present, in Guangdong, the market quotation of 1 watt installed capacity is about 10 yuan, and the power generation is about 1.2 kwh a year. If the benchmark electricity price of 1 yuan/kWh is implemented, it will take about 7 to 8 years to recover the cost. But in fact, only the five major power generation groups and other large state-owned power generation enterprises can enjoy the treatment of electricity price on the benchmark, and some private enterprises cannot get involved and reach it

although the prices of crystalline silicon batteries and components have been falling, and supported by the notice on organizing and implementing the 2012 solar photovoltaic building application demonstration jointly issued by the Ministry of Finance and the Ministry of housing and urban rural development and the subsidy of the "golden sun demonstration project", the construction cost has been reduced to a certain extent, but many projects also need to purchase energy storage devices, which means that investment needs to be increased

according to the data provided by liboping, director and CEO of Nanjing Huabo Instrument Technology Co., Ltd., in terms of the energy storage mode of ordinary independent photovoltaic power stations, the net investment costs (10000 yuan/kw120h) of lead-acid batteries, lithium-ion batteries, sodium sulfur batteries and supercapacitors are 9.6, 43.2, 22.1 and 480 respectively

if the above inputs are only the so-called explicit costs, then some are implicit costs

Meng Xiangan, vice president of China Renewable Energy Association, also made it clear in an interview with this newspaper that the application market of optoelectronic building integration in cities is not large, because the project involves issues such as coordination with urban construction planning, composition of various standards of building materials, and redesign and reconstruction of buildings, which will also incur additional costs, These costs are often invisible and clearly calculated on the table

in terms of power generation, for low latitude areas such as Guangzhou, the power generation of the facade of photoelectric buildings is small and the cost of kilowatt hour electricity is high. Even in Beijing, where the latitude is relatively high, the installed capacity of a 1 kW rooftop power generation project in the Asian Games Village is less than 3 kwh a day, and the power generation cost is about 2 to 3 yuan

micro electricity is difficult to break and merge

"we have done more than 100 distributed photovoltaic power generation projects across the country, and only two or three projects have been merged." Rodo said. In fact, this is not an individual case. Quite a few projects of the "golden sun project" have not been established. As an important form of distributed photovoltaic power generation application, that is, the photoelectric building integration project cannot be spared

self use and redundancy are the basic principles for the operation of distributed photovoltaic power generation projects. However, in China, due to problems such as power system and interest game, electricity has always regarded the electricity generated by distributed power generation projects as "garbage electricity", believing that it will increase the cost of electricity construction and operation and threaten electricity safety. Therefore, the enthusiasm for its acceptance is not high, and it is difficult to limit electricity and other phenomena occur frequently

in fact, many existing projects, if not all, belong to the user side. However, Rodo pointed out that there will be new problems, that is, when the load consumption can not be started again until one minute after we turn off the main motor source, there will be electric energy countercurrent, which will impact the public electricity. Therefore, an anti countercurrent device will be set. Once countercurrent occurs, the device will automatically cut off, which will waste 30% to 50% of photovoltaic power generation

in order to solve the problems of power consumption of distributed generation projects, the industry has gradually pinned its hopes on wechat, but it is also subject to standards, technology, costs, policies and other issues. The future of wechat also seems to be unclear, and the existing projects have different situations

Luo duo said that Xingye Solar has invested in and operated intelligent micro electricity systems on the two isolated islands of Dongao and Wanshan in Zhuhai. Among them, the "fengfengchai smart micro electricity storage" in Dongao has been operating safely for more than two years, completely isolated and self used. The power purchase price of residents on the island has been reduced from 2.5 yuan/kWh (including government subsidies) when they used to rely solely on diesel for power generation to 1.6 yuan/kWh (excluding government subsidies)

in addition to the above two "completely detached" projects, Xingye solar also built a micro electric system in its Hunan Industrial Park and Tianjin eco city. Luo duo said that in the construction process, it was subject to multiple restrictions of electricity. "Electricity is only allowed to establish a self used micro electric system in a single building, and it is not allowed to expand the scale, that is, a transmission and distribution system cannot be established between two or more buildings."

distributed photovoltaic power generation projects such as photovoltaic building integration are facing difficulties or will be broken. Meng Xiangan disclosed to this newspaper earlier that a report entitled "opinions of state power on vigorously supporting photovoltaic power generation and work" has been submitted to the national level, and its core is to effectively simplify the process of distributed generation and merger, shorten the time and reduce the difficulty of merger. This is obviously great good news, but whether it can be effectively implemented remains to be seen. Zhonghua glass () Department