A new round of anxiety about installing surges to the PV quality

Polaris solar PV net news: with the policies of the Chinese Government to promote photovoltaic applications have been issued, China curtain of PV power station construction was opened.

According to incomplete statistics, up to now, the new national PV power stations had reached 114, and most of the large projects, with a total investment amount of more than 76 billion yuan.

Many industry insiders believe, according to annual 13GW of installed capacity target, the fourth quarter of this year will usher in a new round of PV installing the tide. But at the same time, PV power quality problems should not be underestimated, is worrying.

Hundreds of project lift capacity surge

National Energy Board data showed first half of 2014 national new PV on-grid capacity 3.3 million-kilowatt, about 100% than a year ago. Among them, the new grid-connected PV capacity 2.3 million-kilowatt, 1 million-kilowatt new distributed grid-connected PV capacity. When cumulative kWh photovoltaic power generation by about 11 billion-kilowatt, an increase of more than 200%.

It is worth mentioning that, Gansu, Xinjiang and Qinghai cumulative grid-connected PV capacity in the top three, respectively, and 4.45 million-kilowatt and 3.65 million-kilowatt, with the biggest new grid-connected PV capacity in Xinjiang, 900,000-kilowatt, Zhejiang, Jiangsu and Guangdong today distributed grid-connected capacity in the top three, respectively, and 700,000-kilowatt and 420,000-kilowatt, with the biggest new distributed grid-connected PV capacity in Jiangsu Province, is 270,000-kilowatt.

From the above data it is easy to see, national PV investment so far this year compared to last year has improved significantly. Partly due to the low base last year; but also because this year the State has stepped up its investment in the policy support.

According to incomplete statistics, national new PV power plant project has 114, invested a total of 76.23 billion yuan. Still is the focus of photovoltaic power plant investment in the Northwest region, one of the largest amount of investment of provinces of Xinjiang, to 14.15 billion yuan, more than 10 billion yuan of investment in Shaanxi, Inner Mongolia and Hebei provinces have.

Of particular concern is that above there are listed in PV PV enterprises figure, hareon, Sun power, TBEA, Yingli Green energy, investment in solar and other industry leaders have more than one project.

In jiaxing, Zhejiang at a national distributed PV power Conference held a few days ago, national energy administration Wu xinxiong, pointed out that “strive for above 13GW of new grid-connected PV power generation capacity all year round.”

According to statistics from the National Energy Board, first half of 2014 national new PV on-grid capacity is limited to 3.3GW, up 100%, but away from the annual 13GW of installed target far.

In view of this, several insiders told reporters, if Complete 13GW installed capacity goal, will enter a new round of installing photovoltaic power station in the second half surge, especially in 114 projects if digested, end plate for PV industry and capital markets that can usher in a wave of small market.

Recently, shares a number of listed solar companies disclosed, are being overweight PV investment. Sea run PV recently in Shandong, and Jiangsu, to established has over PV power company, while and Nanjing Jiangning high-tech Park signed has 150MW distributed PV project; love Kang technology is in in Inner Mongolia and Jiangsu acquisition has two a PV power project, project scale 120MW, total investment 350 million Yuan; also, recently announced suspension of days Dragon photoelectric revealed, its founding shareholders to through increased funding spread unit introduction strategy investors.

According to press reports, another reason to PV installed capacity market rally also related to PV performance turns for the better. Wind statistics show share photovoltaic plates issued by 30 companies in 2014, compared with most of its first-half net profits have achieved varying degrees of growth. Among them, 27 companies with an average net profit of 87.67 million Yuan, compared with the average of 15.71 million dollars of last year’s performance, rose 658%.

Quality storage worries

However, in a photovoltaic power station built at the same time, the component’s quality problems are also emerging.

Third-party testing organization Beijing Jian Heng Ji Zhenshuang Certification Center Deputy Director told reporters that “in the country’s 32 provinces, 3.3GW, 425, including large power plants and distributed PV power station’s equipment detected, PV modules there are hot spots, cracked, attenuation, etc.”

According to Beijing mirror scale Certification Center on Xinjiang a 8MW PV station of sampling in the found, 3178 block PV component in the infrared imaging sampling 2856 block, which 19% exists virtual welding hot spot effect; Qinghai a 50MW PV station, sampling 44080 block PV component, found 29% component appeared obviously worms lines hidden crack; a domestic well-known component factory production of 1.6MW component arrival acceptance in the, sampling in the found 10% component appearance fault, 20% exists hidden crack fault; Gansu a 10MW PV station , Sampling found PV module has power sharp attenuation of up to 58%. Generally speaking, the annual decay component of photoelectric conversion rate should be less than 0.8%, but such PV module performance were beyond the scope of this.

Life cycle of up to 25 years for PV power plant, component quality is one of the decisive factors that affect investment returns. If the component life is substandard or conversion decay too quickly, then all the investment measure is building castles in the sand.

According to press reports, the current domestic photovoltaic power plant has been completed, it can be the potential takeover target very small margin of safety, in addition to the uncertainty of the policy and market environment factors, investors ‘ biggest concern is the quality of these PV lack the confidence.

“Banks and investors are an important reason to PV misgivings, still lie in the plant’s quality, but this did not raise the power plant developer attention. “The NDRC Energy Research Institute researcher Wang Sicheng in the case said in an interview with reporters.

For PV module manufacturers, Silicon part is the core components from silicon materials procurement to manufacturing enterprises, each production process should implement effective quality control. But non-Silicon parts, such as back panels, borders, silver paste, junction boxes and other material effects on the quality of components should not be overlooked. Especially the back sheet materials, is one of the decisive factors of component life.

According to experts, backplane material failure of the packaging materials within the components and the battery direct exposure in harsh outdoor environments, causing hydrolysis of packaging materials, batteries and solder corrosion and delamination problems, quickly reduce the power output and longevity, seriously it can cause insulation failures, resulting in a fire and casualty.

Of course, to ensure that the components function will not be easy. As a protective layer of PV modules, back sheet materials to withstand 25 years of ultraviolet light, dust, moist and dry heat ageing factors of long-term tests.

Original title: a new round of anxiety about installing surges to the PV quality

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