With the result of the state subsidy bidding for the photovoltaic power inverter generation project of the State Energy Administration in 2019, the sunshine power source (300274.SZ), which was not a “visible landscape” in the investment field of power plants in the industry, went to the center of the stage. According to industry statistics, Sunshine Power has won the 1570MW bidding project. If the first batch of 860MW parity projects are superimposed, a total of 2430MW power plant projects will be captured, ranking first among residential photovoltaic enterprises in scale. The fierce move shocked the industry. Headquartered in Hefei Hi-tech Zone, Anhui Province, Sunshine Power has been deeply cultivated in the photovoltaic industry for 22 years. It has been known to the industry as the leading enterprise of global inverters before. In fact, as early as 2014, its photovoltaic power inverter station business revenue has surpassed the inverters business and become one of the main business, and in 2017, it joined the global light industry. Volt EPC market three. Industry insiders told China Business Daily that such a large-scale investment in solar power plants is likely to change the market pattern of photovoltaic power plant investment in 2019. But what’s the logic behind it? Short-term performance decline was founded in 1997, Sunshine Power Supply, one of the earliest domestic enterprises engaged in research and development and production of inverters. Its business involves six parts: photovoltaic inverters, power plant system integration, wind energy converter, energy storage, new energy vehicle drive system and floating system. Among them, the integration of photovoltaic inverters and power system is the company’s main business, accounting for more than 90%. Up to 2018, the total installed inverters exceeded 79GW, accounting for about 30% and 15% of the domestic and foreign markets respectively. Over the past few years, with the support of inverters technology and services, the performance of Sunshine Power Source has soared rapidly as a result of the superimposition of a market environment that has been advancing all the way. Especially from 2013 to 2017, the company’s revenue reached 2.12 billion yuan, 3.062 billion yuan, 4.569 billion yuan, 6.044 billion yuan and 8.886 billion yuan, respectively, increasing by 95.73%, 44.42%, 49.21%, 31.39% and 4.801% over the same period of last year; net profit reached 181 million yuan, 283 million yuan, 425 million yuan, 554 million yuan and 1.024 billion yuan, respectively, up by 14.866%, 55.21%, 31.39% and 4 billion yuan over the same period of last year. 91%, 50.17%, 30.14% and 85%. However, this trend of high growth began to turn with the landing of the “531” policy in 2018. Reporter statistics found that more than 60% of the net profit of photovoltaic enterprises has declined, of course, as the leader of the inverters, the sun power is no exception. As can be seen, the growth rate of Sunshine Power’s business revenue slowed down in 2018, and the net profit also declined to a certain extent. Among them, in 2018, the company’s operating income was 10.369 billion yuan, an increase of 16.69%, and its net profit was 810 million yuan, a decrease of 20.95%. Facing the industry dilemma, many photovoltaic enterprises, including sunlight power, have chosen to break through by “developing overseas markets and opening up diversified management”. It is understood that since the second half of 2018, Sunshine Power has vigorously exploited overseas markets such as the United States, India, Vietnam, and coordinated the development of energy storage, new energy vehicles and other businesses, especially the energy storage business increased by 495.75% year-on-year in 2018. Nearly half a year after the “531” New Deal landed, the industry’s difficulties can be said to have passed. Cao Renxian, chairman of Sunshine Power, told reporters publicly that after “531”, the industry has indeed been greatly affected, but much better than expected. It’s not as moisturizing as before, but it’s still healthier. The reality is that domestic subsidies and indicators policies have been in a blank period for a long time, and the demand of domestic photovoltaic market has shrunk dramatically. Relevant data show that from January to May 2019, China added 7.61 GW of new photovoltaic installed units, a decrease of 44% compared with the same period last year. Affected by this, the net profit of sunshine power supply continued to decline in the first quarter and half of 2019. Among them, in the first quarter of 2019, Sunshine Power realized business income of 2.219 billion yuan, an increase of 30.11% compared with the same period last year; net profit attributable to shareholders of listed companies was 171 million yuan, a decrease of 15.56% compared with the same period last year. The first half of 2019 performance forecast shows that net profit is estimated to be 314 million to 352 million yuan, down 8% to 18% from the same period last year. In terms of solar power inverter supply, the domestic installed capacity of new photovoltaic devices declined considerably year-on-year, and domestic business was affected to a certain extent. In response, an analyst at Guosheng Securities also said that the first half of the domestic photovoltaic scale was not planned too much, the company’s performance in the first half was affected, which is basically in line with expectations. At the same time, Huachuang Securities believes that the company will benefit significantly from the start of the domestic photovoltaic market in the second half of the year and the sustained high growth of overseas exports.

After a slightly sluggish year, the domestic photovoltaic market has been fully launched in the second half of 2019, and many enterprises have made great efforts to seize the market. And filling power station business undoubtedly becomes a powerful weight of sunshine power supply. On July 11, the State Energy Administration announced the results of photovoltaic subsidy bidding in 2019. It plans to include 3921 projects from 22 provinces (districts and municipalities) such as Beijing and Tianjin into the scope of the national bidding subsidy in 2019, with a total installed capacity of about 22.79GW. Among them, Sunshine Power won the power station development right with 1570MW bidding index, ranking first among residential enterprises in scale. On the contrary, peer companies, influenced by last year’s “531” policy, such as Xiexin New Energy (00451. HK), Panda Green Energy (00686. HK), North Control Clean (01250. HK) and Jiangshan Holdings (00295. HK), have all sold their photovoltaic power plant assets in succession, opening up the “big withdrawal” mode of power plant investment. Among them, Xiexin New Energy, the second domestic photovoltaic power plant investor, has won only 120 MW bidding project. “Not much has been done before, but this year is quite radical.” According to an EPC enterprise manager in the industry, at present, the profit of photovoltaic inverters is getting thinner and thinner, and its business volume of energy storage and floating is not so large, so it may need to change its business direction. In addition, a person in charge of inverters told reporters: “Sunshine power supply pressure is also very high, no longer do some projects, the results are not good.” Reporters from a person close to sunshine power sources also received confirmation, he disclosed that the recent chairman of sunshine power Cao Renxian struggled, may personally out of Mana many projects. For the power plant project indicators related matters, the sunshine power source did not respond to reporters, saying that keep a low profile, temporarily do not publicize. In the view of industry insiders, extending the industrial chain to the power inverter station and exerting the synergistic effect of “product + power station” is the profit-making mode of photovoltaic manufacturing enterprises. This can not only increase the business income of power plants, but also bundle and sell their own inverters, playing a “two wings fly together” effect.

In 2013, Sunshine Power set up a power plant business department, which began to develop, design, construction and operation and maintenance of power plant projects. At present, the company’s power station business model mainly includes EPC (also known as turnkey engineering, namely design, procurement, construction) and BT (namely investment, construction and transfer). According to the company’s financial report from 2014 to 2018, the revenue of power station system integration business has soared, accounting for 49.56%, 49.50%, 54.72%, 52.52% and 56.59% of the total revenue, respectively, of 1.518 billion yuan, 2.262 billion yuan, 3.285 billion yuan, 4.667 billion yuan and 5.868 billion yuan. It is noteworthy that in 2014, the company’s first super photovoltaic inverters in power plant system integration business revenue increased by 129.56% year on year. And in 2018, when the photovoltaic inverters business suffered a certain impact, the power plant business still boosted the overall main revenue. Foreign media pv-magazine cited data from IHS Markit’s “Photovoltaic EPC and O&M Provider Tracking” show that in 2018, with a market share of 1.3%, Sunlight Power ranked second in China and third in the world after Tec Substation. However, an employee of Sunshine Power Station Business told reporters that at present, the Business Department of Power Station includes wind power and photovoltaic business at home and abroad. Although in the same power station, the inverters may only account for 5% and the power station is 100%, the influence of the inverters is still relatively large. According to the incomplete statistics of the company’s financial report in 2018, the construction of photovoltaic projects by BT and EPC modes for solar power in 2018 is about 1437 MW, including 436 MW for BT service grid-connected power station, 50 MW for construction project, 944 MW for EPC service grid-connected project and 7 MW for construction project. By contrast, in 2019, only bidding and parity projects won more than 2GW, which is a big deal. “Flexible” investment logic photovoltaic power plant assets business belongs to the heavy assets industry, marching into this field in a large scale, the greatest test test test is the operating cash flow of enterprises, or financing capacity. It is understood that, constrained by financing pressure and high asset-liability ratio, some power plant developers have been affected to varying degrees after changes in the domestic policy environment. At the same time, as the photovoltaic industry rapidly enters the initial stage of bidding and parity, the cost pressure of power plant construction is relatively high, and the performance of these power plant developers is not positive. On July 17, journalists learned from their practice that even some enterprises that have already obtained the bidding target for power plants in 2019 have begun to consider selling, looking for “bottom” enterprises everywhere, because of the financial pressure.
So, is there any financial pressure for the construction of power plants in the sunshine power supply? Reporters combed the company’s earnings from 2016 to 2018 and the first quarter of 2019, and found that the operating cash flow of Sunshine Power declined to a certain extent, and the liabilities also tended to rise. The results of the first quarter of 2016-2018 and 2019 show that the net cash flow generated by the company’s business activities during the reporting period is 866 million yuan, 855 million yuan, 181 million yuan and -723 million yuan, respectively. In the 2018 financial report, the company explained that the net cash flow from its business activities had declined a lot, which was due to the purchase of commodities in the current period, the payment of cash for labor services, the salary of employees, and other cash increases related to its business activities. Meanwhile, from 2016 to 2018 and the first quarter of 2019, the total liabilities of sunshine power supply reached 5.693 billion yuan, 9.225 billion yuan and 10.698 billion yuan, 109.47 billion yuan respectively, showing an obvious upward trend. Reporters noted that Sunshine Power Company launched a major move to raise funds from banks at the same time as it released its earnings report for 2018 and its earnings forecast for the first quarter of 2019. On March 30, the company issued a bulletin on the application for comprehensive credit lines to banks in 2019. According to the company’s daily operation needs, the total amount of credit lines applied to 18 banks, such as Luyang Branch of China Construction Bank, Hefei Branch of Agricultural Bank of China and Hefei Science and Technology Branch of Industrial and Commercial Bank of China, is no more than 8.6 billion yuan. As for the problem of capital pressure, an EPC executive of a photovoltaic enterprise calculated an account to reporters: according to the calculation of 4 yuan/W, the 2GW power station will be about 8 billion yuan. Therefore, there should be no problem with the financial pressure of sunlight power supply. In the view of the above-mentioned executives, Sunshine Power has a good “flexibility” investment space in this large-scale filling of power station business, whether from the enterprise’s own power station business model or from the policy buffer time point of view. According to reports, the photovoltaic policy in 2019 buffers the first batch of parity and bidding projects, and does not pose a greater risk to power plant investment enterprises. This also means that according to market, cost and capital requirements, solar power inverter can consider some parity projects to postpone grid-connected time. “Parity projects can be done next year. Bidding can be done as part of the project, even if the price of the first half of next year can be reduced by one or two cents. These executives told reporters that if there is pressure this year, it may be the pressure to buy components, but the power plants built by Sunshine Power are generally to be sold, so that part of the funds can be recovered quickly, and the overall turnover can be achieved. The reporter contacted a person in charge of the new energy of the Three Gorges, who has a close cooperation with Yangguan Power Supply. The other party said that the sunshine power supply generally builds its own projects and transfers them after completion. In recent years, it has developed well and should have capital.

Recently, Bloomberg New Energy Finance BNEF released Solar Module & Inverter Bankability 2019, which mainly focused on the financing value of world-renowned photovoltaic industry manufacturers.
With sound financial performance, reliable product quality and good corporate goodwill, Huawei, Sunshine, Jinlang and Toshiba Mitsubishi rank among the top four brands in Asia in terms of the financing ability of power inverter .
Bloomberg New Energy Finance (BNEF) is one of the most credible third-party research institutions in the global new energy market. As a leading global provider of business, financial and financial information, Bloomberg’s professional research institute, BNEF regularly publishes various professional analysis reports in the field of renewable energy, which have long been widely used by many international financial institutions as an important reference for credit business.
BNEF independently develops and establishes quarterly Tier 1 supplier ratings for photovoltaic modules, which are graded according to the “bank financing” of major manufacturers of photovoltaic modules, in order to create a transparent distinction among hundreds of suppliers worldwide. “Banking Financability” represents whether a solar product project can obtain non-recourse debt financing from the bank, and BNEF traces the completed transactions of manufacturers through its complete database as the basis of the conditions. At the same time, it investigates the time range of the transactions to be able to finance the bank funds.
Due to the strict qualifications, BNEF evaluation data are often used as fair, objective and reliable data in industry production forecasting and analysis of major competitors. power inverter
The BNEF report focuses on the financing value of world-renowned photovoltaic inverters manufacturers. They sent questionnaires to stakeholders in the photovoltaic industry such as global financial institutions (banks, funds), project developers (EPC), independent power producers and operators, and conducted in-depth interviews with quality inspection and technical experts, covering 25 gigawatts of photovoltaic products worldwide.
This article was first published on Wechat Public No. Huaxia Energy Network. The content of the article belongs to the author’s personal opinion, which does not represent the position of Hexun. Investors operate on this basis, at their own risk.

With the wide application of photovoltaic power inverter plants, photovoltaic inverters are also widely used. According to the application of photovoltaic power station in different scenarios, it can be divided into household type, commercial type and power plant type. Household and commercial photovoltaic systems in roof power inverter plants are usually called series grid-connected inverters, which are distinguished from power plant or centralized inverters. Today, the inverters manufacturer will elaborate on the technology of household photovoltaic inverters.
The output power level of household photovoltaic grid-connected inverters usually ranges from 1 kW to 30 kW or less than tens of kilowatts. This kind of photovoltaic inverters usually meet the following requirements:

1. Single-phase or three-phase low/medium voltage grid connection
2. Transformer-free design, conversion efficiency greater than 96%.
3. Wall-mounted installation, IP65 protection level, to meet outdoor use conditions
4. The whole machine is portable, friendly display interface, beautiful appearance, etc.
   The end users of household photovoltaic power inverter are individuals and families, so the design of the inverters is close to the design of household appliances. Household inverters are used indoors, so the products themselves should meet the needs of low noise, beautiful appearance and small size. For the inverters manufacturers, they should fully study the needs of the target market users for the appearance, installation and other aspects of such electrical products, to meet the differential needs of customers, so as to make the inverters products in addition to. With the conditions of safety and efficiency, it can also meet the needs of users on appearance, interface display, installation and other aspects, in order to better meet customer needs, promote market development and product upgrading.

According to a statement released this week by Roth Capital Partners, Huawei withdrew from the U.S. frequency converter market, dismissed all U.S. employees and transferred non-U.S. employees abroad. Huawei has reportedly laid off 80% of its employees in business units.
Although the news has not yet been confirmed, foreign media reported earlier this year (two months) that 11 U.S. lawmakers encouraged the U.S. Department of Homeland Security and the Department of Energy to prevent Huawei from supplying solar power inverter to the U.S. market. The inverter converts solar energy into electricity that can be transmitted to the grid of the U.S. Energy Corporation.
According to the information, Huawei has been thinking about introducing the accumulation of Huawei’s digital information technology into the field of photoconductivity, and contributing to the sustainable development of the photoconductive industry through cross-border integration and innovation. Based on the in-depth understanding of the photoconductive industry and power inverter plant operation, the “silicon forward and backward” products are proposed. Design concepts and innovative solutions of “intelligent photoelectric station” have been standardized and applied.
Huaneng Solar Power Station is a new type of power inverter station, which is based on the light energy conversion and power transmission network. It combines modern advanced digital information technology, communication technology, Internet technology, cloud computing technology, large data acquisition technology and light energy technology. It fully satisfies customers’high development of energy power plants. In order to meet the needs of electricity consumption, low initial investment, low operating cost, high reliability and safety, we can achieve high income, operability, manageability and performance in the 25-year life cycle.
Huawei ranked third among the top 10 solar inverters suppliers in India in 2018, with a market share of 12%.

At present, PWM is mainly used in power inverter , and the controller switches to DC quickly in a pulse period to ensure that the DC integral value equals the sampling value of AC sinusoidal wave at the same time. After filtering, more than 96% sinusoidal output can be achieved. Pulse inverters are self-excited inverters, and the output voltage is pulse modulation. This power inverter reduces the number of voltage and current pulses by increasing the number of cycle pulse switching, which is achieved only by increasing the number of commutation times of the inverter.
The inductance of AC power inverter determines the current harmonic content. Therefore, in order to meet the requirements of grid access, the equivalent inductance of photovoltaic power generation system should be small. Power inverters are connected to low-pass filters and isolation transformers. It can filter the harmonics below N-1, where N is the trigger pulse current of the current cycle. In order to increase the switching frequency, the power loss of electronic devices will increase, but the loss of low-pass filters with low switching frequency will increase. If combined with the current clock frequency multiplier of single-phase AC network, the frequency of AC control signal that modulates the DC output of photovoltaic generator will be doubled.
Usually, converting AC energy into DC energy can be called rectifier. This circuit is called rectifier circuit. It completes the function of rectifier. The rectifier process of this device is called rectifier device or rectifier device. Correspondingly, the process of converting direct current to alternating current is called inverting phase, and the circuit that completes the inverting circuit is called inverting circuit. The inverting process of this device is called inverting device or inverting power supply.
Modern inverting power supply technology is a subject to study the theory and application of inverting circuit. It is a practical technology based on industrial electronics, semiconductor technology, modern control technology, modern power inverter electronics technology, semiconductor converter technology, pulse width modulation (PWM) technology and other topics. It mainly includes semiconductor power integrated devices and their applications, inverters and inverters control technology.

I. About Charging

1. When UPS is floating charging, please charge it with constant voltage or current below 0.002CA at a charge voltage of 2.275V/cell (set at 20 C). When the temperature is below 0C or above 40C, it is necessary to modify the charging voltage. With 20C as the starting point, the single cell voltage changes – 3MV with each change of one degree.
2. When cycling charging, the charging voltage is 2.40-2.50V/cell (the setting value at 20 C), and the charging voltage is constant. When charging at temperatures below 5C or above 35 C, starting at 20 C, the charging voltage is adjusted to -4mv/cell for each change.
3. The initial charge current is controlled below 0.25CA.
4. Charging capacity is set to 100-120% of discharge capacity, but when the ambient temperature is below 5C, it is set to 120-130%.
5. The lower the temperature (below 5C) is, the longer the charging end time is, the higher the temperature (above 35C) is, the more likely it is to be overcharged. Therefore, it is better to charge within 5C-30C, especially in cyclic use.
6. In order to prevent overcharging, install charging timer as far as possible, or automatically convert to Trickle-flow charging mode.
7. When charging, the temperature of the battery should be controlled in the range of – 15C to + 40C.
   II. ON DISCHARGE
   When discharging, the temperature of the battery should be controlled in the range of – 15 -+50%.
   Continuous discharge current should be controlled below 3CA (H below 6CA).
   The discharge termination voltage varies with the magnitude of the current, as described below. Note that when amplifying, the voltage should not be lower than the following voltage.
   Please charge quickly after discharging. If discharged carelessly, please charge immediately.
   III. Installation Notes
   When installing batteries, the following must be observed:
8. Do not install batteries near the sealed space or fire, otherwise there is a risk of explosion and fire. UPS
9. Don’t cover the battery with ethylene film which may cause static electricity. Sometimes it will cause explosion when static electricity is generated.
10. Do not install batteries in places where water is likely to enter. Otherwise, there is a risk of electric shock and fire.
11. Do not install batteries in the environment of – 40 C~60 C.
12. Do not use batteries where there is dust, otherwise it may cause short circuit of batteries.
13. When putting the battery into the box, we should pay attention to the air circulation.
14. Do not press the upper cover with sticky or labeled objects. Because there is an exhaust valve under the upper cover, the gas generated in the battery will not escape.
15. When the number of parallel connection is floating charging, the plug-in terminal batteries can only be connected with three rows. There is no special restriction on bolted terminals, but the number of connection is small and the reliability increases. In addition, in parallel connection, it is necessary to consider making the connection conductor and contact resistance equal between the columns. In order to keep the charge and discharge batteries in balance, the actual use should not exceed three columns.
16. When using batteries with different capacities, new and old, and manufacturers with different batteries, it is possible to damage batteries and machines because of their different characteristics, so please avoid using them.
    IV. On custody
17. When keeping, please note that the temperature should not exceed – 20 ~40 ~C.
18. Batteries must be kept in full charge when they are in storage. Since some capacity will be lost due to self-discharge during transportation or storage period, please make up the power supply when using.
19. For long-term storage, in order to compensate for self-discharge during storage, please make a supplementary call. Storage over 40C has a bad effect on battery life, please avoid!
20. Keep in a dry, low temperature and well ventilated place.
21. If the battery packaging is improperly wetted by water during storage or transfer, the packaging carton should be removed immediately to avoid the water-wetted carton becoming a conductor and causing battery discharges or burning positive extremities.
    V. Daily Inspection and Maintenance UPS
22. Check batteries regularly. If dust and other external contamination are found, please clean the batteries with water or cloth soaked in warm water. Do not use gasoline, banana water and other organic solvents or oils for cleaning, in addition, please avoid the use of chemical fiber cloth.
23. When the total voltage or the indicator value of the voltmeter on the indicator panel deviates from the benchmark value shown in the table below (+0.05V/cell) during floating charging, the reasons should be investigated and handled.

First, what is UPS ? What is its working principle and application scope?
Uninterruptible power supply (UPS) is a kind of power supply equipment that can keep its load equipment from external power system interruption for a period of time.
With the continuous development of digital computer technology, its application has gradually penetrated into industrial control, banking, power, military, financial, communications and other important departments, which also puts forward more stringent requirements for the stability and reliability of computers. The emergence of UPS is to cope with the sudden power outage, voltage instability, power line clutter* and other problems that often occur in the power system, to ensure that the computer system can continue to work normally when the power supply problems arise.
UPS works like a reservoir. When the external power supply is normal, UPS will not only supply power to the load normally, but also convert part of the electric energy into chemical energy to store. Once the external power supply is suddenly interrupted, UPS will immediately start the inverters, which will rapidly convert the chemical energy into electrical energy to supply power to the load continuously, so as to ensure the normal work of the load equipment. Do.

1. How to Choose an UPS Power Supply Suitable for You
   According to the statistics of 86ups.com, a global professional UPS power data website, there are as many as 20 UPS power brands in the market, totaling 1643 UPS power products. Faced with so many kinds of UPS power products, which one is more suitable for you?
2. How to Choose Online and Backup UPS Power Supply
   Generally, online UPS has a high price, but its protection function is very perfect. It can filter out all kinds of viruses parasitic on the vast majority of power grids and fully guarantee the stability and safety of load equipment. Backup UPS has a small volume and low price, and can also prevent data loss caused by power failure for some equipment systems that are not particularly important. No problem.
   If economic conditions permit, of course, first online UPS. But from an economic point of view, a backup UPS power supply is enough for ordinary families, or ordinary office space with low requirements.
3. Choose what capacity of UPS power supply is adequate
   At present, the average power consumption of a computer is about 250 VA, and a backup 500 VA UPS can provide about 10 minutes of power for it. This period of time has fully guaranteed that you have enough time to save the files, and then shut down the computer normally. There are many computers at home that can calculate the total power by themselves, and then select the appropriate UPS capacity. For some special commercial and industrial applications, the calculation is much more complicated. Because these departments often require UPS to ensure that dozens of computers can work for more than ten hours or even tens of hours without power supply.

Reporters learned that the photovoltaic poverty alleviation project has been identified as one of the “Ten Precision Poverty Alleviation Projects” by the state, and has been widely concerned by people inside and outside the industry. It has also been the market that many photovoltaic enterprises competed to enter.
The project of photovoltaic poverty alleviation power inverter station is listed as “asset income” poverty alleviation in the type of industrial poverty alleviation project. Generally speaking, after the power station is connected to the grid, the project is transferred to the local government. The local government benefits from the income of the power station assets, and solves the employment of some poor people, so as to realize the transformation from “blood transfusion” poverty alleviation to “hematopoietic” poverty alleviation.
Using its own expertise and ability in the new energy industry, Sunshine Power is also actively practicing the photovoltaic poverty alleviation model to cultivate the hematopoietic function of poor areas and families. By the end of 2018, the solar photovoltaic poverty alleviation footprint has spread across 16 provinces in China, helping over 300,000 poor households and 2,200 poor villages with a total scale of 1.2 million KW.
Up to now, solar power has donated 5100KW photovoltaic power stations to many places in Anhui Province, 1070KW photovoltaic power stations have been built in Sichuan, Shanxi, Guangxi and Jiangxi, and nearly 18,000 poor households in Yuexi County, Shandong Caoxian County and other places have undertaken the task of operation and maintenance of 760,000 KW photovoltaic poverty alleviation power stations, providing 3000 yuan per year for poor households. Electricity revenue escorts.
On March 26, 2018, in order to standardize the construction and operation management of photovoltaic poverty alleviation power stations and ensure the implementation effect of photovoltaic poverty alleviation, the State Energy Administration and the State Council Poverty Alleviation Office formulated and issued the Measures for the Management of Photovoltaic Poverty Alleviation Power Stations (hereinafter referred to as the Measures). The Measures stipulate that the construction of photovoltaic poverty alleviation power stations shall be funded by local governments according to their financial resources, including financial funds at all levels, East-West cooperation, fixed-point assistance and social donation funds. Photovoltaic power inverter stations for poverty alleviation shall not be built in debt and enterprises shall not invest in shares.
This regulation suddenly disrupted the financing chain of the photovoltaic industry poverty alleviation project, which was previously “enterprise advancement – Asset Transfer – government financing with assets – repayment to enterprises”, and many enterprises stayed away from it.
The change of this policy has resulted in the increase of accounts receivable or bad debts of several photovoltaic listed companies, or a huge impairment of assets. Among them, due to the influence of the new policy of photovoltaic industry and the policy changes of photovoltaic poverty alleviation projects in poor counties, the recovery of accounts receivable of the company’s commercial power plants and poverty alleviation projects can not be fulfilled on schedule, and the company has made 394 million yuan of provision for new bad debts.
In addition, Hailu Heavy Industries acquired Jiangnan Integrated Photovoltaic Enterprise in 2017. In 2018, the proportion of integrated accounts receivable in business income in Jiangnan increased significantly compared with the previous year. Hailu Heavy Industry explained that due to this year’s national macro-control of the photovoltaic industry, the photovoltaic poverty alleviation power plants are not allowed to finance leasing and other restrictions, resulting in a larger receivable in this year. The annual report of Hailu Heavy Industry in 2018 has put forward 814 million yuan of goodwill impairment for Jiangnan Integrated Project.
However, it is noteworthy that, after the issuance of the Measures, the sunshine power supply is still lending through banks in the construction of photovoltaic poverty alleviation power inverter plants.
In August 2018, due to the development, construction and operation and management needs of the 80MW distributed photovoltaic power generation poverty alleviation PPP project in Caoxian County, Shandong Province, Caoyang Caoxian Company, a subsidiary of Sunshine Power Supply, applied to the subbranch of Qilu Bank Co., Ltd. for a loan amount not exceeding 300 million yuan, with a borrowing period not exceeding 5 years; in June 2018, Yinxiao County applied for a loan amount not exceeding 300 million yuan. To meet the needs of development, construction and operation management of 0 MW photovoltaic poverty alleviation power station project, Xiaoxian Yiguang Company applied to Anhui Branch of ICBC for a loan amount not exceeding 100 million yuan and a loan term not exceeding 15 years.

Sunshine power inverter , the world’s leading supplier of inverters solutions, renewable energy, announced that BloombergNEF, which has been rated “100% bank guarantee”, is among its latest investigative inverters companies, suggesting that inverters using Sunshine Power are more likely to obtain non-recourse debt financing from banks than other competitors. Endowment.
BloombergNEF Banking Survey asked banks, developers and technology due diligence firms, who believed that 17 inverters manufacturers thought they had capital. BloombergNEF, recognized by many international financial institutions as one of the most reliable third-party renewable energy research centers, first asked about the financing of inverters. Sungrow is one of the few inverters that can be converted to 100%.
The survey highlighted the credibility and reliability of cooperation with Sunshine Investment, taking into account the comprehensiveness of the assessment, especially long-term warranty and insurance, local support and excellent product quality. It is noteworthy that Sungrow has a leading testing center in the industry, and all major international certification bodies have passed the certification, including Rhein TV, TV South Deutsche Group, CSA, UL and CNAS. Sunshine inverters have passed more than 1,000 independent quality and reliability tests, which most inverters manufacturers can not match.
“We are proud to be the preferred brand for customers, partners and financial institutions,” said Cao Renxian, chairman of Sunshine Power. “Sungroup is providing the most advanced products and is continuing to devote itself to R&D. We are building our own integrated service platform covering six continents.
It is noteworthy that the current financial report of Sunshine Power in the first half of the year shows an annual growth rate of 14.56%, compared with last year, indicating that the company’s “trumpet strongly drives sustainable economic development”. The company’s international expansion is particularly important, and currently has a leading market position in the Americas, Southeast Asia and other regions.
Sungrowth power inverter Supply Co., Ltd. (“Sungrowth”) is the world’s leading supplier of renewable energy inverters solutions. As of June 2019, more than 87 GW has been installed worldwide. Founded in 1997 by Professor Cao Renxian, Sungrow is a leader in the research and development of solar inverters. It has the largest professional R&D team and a wide range of product portfolios, providing photovoltaic inverters solutions and energy storage systems for utility-scale businesses. And residential applications, as well as internationally recognized floating photovoltaic power plant solutions. With a 22-year strong record in the photovoltaic field, Sungrow products have power inverter installations in more than 60 countries, maintaining a global market share of more than 15%.

Recently, good news came from Deqin photovoltaic power inverter station in Tibet. Huawei’s smart photovoltaic solution passed the performance test of LVRT at one time. It is the first inverter enterprise to pass the test in the environment of Tibet power grid. Deqin Photovoltaic Power Station has also become the first photovoltaic power station in Tibet to optimize the performance of power grids such as on-site low voltage crossing.
This test is carried out jointly by the National Grid and Tibetan Electrical Academy. It is based on the National Standard GB/T 19964-2012 “Technical Regulations for the Access of Photovoltaic Power Stations to Electric Power Systems”, and puts forward more stringent requirements for the access of photovoltaic grid-connected inverters to Tibetan grid. In order to reduce the impact of short-circuit faults on Tibet’s power grid and enhance the ability of photovoltaic power plants to support the stable operation of the grid, several photovoltaic inverters enterprises participated in the test. Huawei is the only enterprise that has passed the test.
Due to the particularity of Tibet power grid, this test standard is stricter and more difficult than the national standard GB/T 19964-2012 “Technical Regulations on the Access of Photovoltaic Power Stations to Power Systems”, while Huawei passed it directly and smoothly.

1. Continuous active current output capability is required during LVRT: Huawei Inverter achieves precise output of active current through AI-supported intelligent grid-connected control algorithm, and under the premise of stable control of reactive current output during LVRT, by improving active current control capability. The grid-connected stability of inverters under LVRT transient and steady-state impact is guaranteed, and the continuous output of active and reactive power inverter supports the rapid restoration of power grid.
2. The LVRT end-inverters should have the ability of active power fast recovery: Huawei Inverter can quickly identify LVRT status through advanced Fault-Crossing detection algorithm, and ensure continuous power output through real-time and fast power inverter control when LVRT restores. After the end of LVRT, the active power restores to the pre-fault level within 0.5 seconds, which reduces the risk of active power/frequency instability caused by LVRT.
3. Stricter LVRT duration requires that more than 70% of Un inverters have the ability of continuous grid-connected operation. Huawei inverters also have LVRT curves to set interfaces. Through hardware and software design, the inverters can operate reliably in a wide voltage range, and support the long-term grid-connected operation ability of light LVRT70% Un.
   As early as 2014, Huawei’s 200 MW photovoltaic power station in Qinghai Gonggong successfully passed the field LVRT test. In the weak grid environment of India, Middle East, North Africa and other countries, Huawei’s smart photovoltaic solutions have shown excellent performance in Fault-Crossing capability, which has been highly evaluated by the owners. This time, more rigorous LVRT tests were successfully passed in Tibet power inverter grid environment, which once again shows that Huawei is in the absolute leading level in the friendliness of photovoltaic grid-connected, leading photovoltaic from adapting to the grid to supporting the grid.