Jiangsu solid Dulwich today announced that its 17 kilowatts dual -phase photovoltaic inverter (GW17K-DT) in a series of rigorous tests PHOTON Lab outstanding performance by its double "A" rating. Solid Dulwich has thus become the first company in one year interval two consecutive double-A ratings China PHOTON inverter manufacturers .

        Dulwich DT Series Dual solid -phase modified sine wave inverter cover 10kW, 12kW, 15kW, 17kW and 20kW power and many other models, has been successfully applied to more than a dozen domestic and commercial, industrial roofing and small photovoltaic power plant project . The test results show that the solid -phase dual Dulwich inverter conversion efficiency from either the design or the technology are among the world's forefront of similar products .

        This model uses digital control technology, advanced inverter topology and control technology, can achieve up to 98.2% conversion efficiency , optimized inductor design makes less noise , more efficient Europe . Its ability to support a reliable power grid , high waterproof and dustproof as well as components of wide voltage access range, making it capable of performing large -megawatt power plant design requirements. PHOTON Magazine October issue will be on the inverter with charger section for further analysis reports .

Recently, the world's leading research institutions IMS Research report shows that in 2011 , the global PV inverter market areas, the power of the sun from the Chinese mainland annual shipments increased significantly , nearly 1GW of shipments SMA, Power-one, Kaco, Siemens together among the world's top five , and became the only one in the top ten from China PV inverter business.

    As Asia's largest PV inverter business, sun power since its establishment 15 years ago, has been focusing on new energy sources such as photovoltaic inverter power conversion technology innovation and development, precipitation has accumulated a strong research and development , with a number of core technologies inverter . In recent years , the sun 's solar power inverter is to accelerate the pace of technology upgrades optimization , product innovation, many times by the global PV inverter authority - PHOTON Laboratory sure, the domestic industry 's leading product, into the world advanced level ranks.

    2011 , the sun power successfully landed capital markets, to become China's new energy supply industry first shares ; their SUNGROW brand also won the industry's only "China Famous Brand ." Currently, the company 1.5KW to 1.26MW full range of wind grid tie inverter products has passed TÜV, CE, ENEL-Guide, ETL, CSA, AS4777, BDEW, Golden Sun and many other authoritative certification and testing , to meet each household photovoltaic roof systems, commercial rooftop photovoltaic systems, ground systems and other large-scale photovoltaic power plants needs of different types of projects , and provides integrated system solutions.

In an increasingly competitive PV market , the sun power as an industry leader , is through continuous product development and continuous innovation to obtain a high-speed dynamic growth , its excellent brand influence to get more customers in China and Europe and the recognition of the market appeal is further enhanced .

New Energy Co., Ltd. , Guangdong Bao Wei not only provide customers with professional stent design for the total package provides turnkey photovoltaic power plant construction services , with professional knowledge and rich experience , Paul Wei inverter for supporting the selection of components and also can give constructive comments.

Since crystalline silicon cell module fill factor is high, the peak point of the inverter is easy to find , but amorphous silicon thin film battery pack is relatively low fill factor , IV curve is gentle , the inverter need to set the step voltage tracking MPPT to find the peak point .

Meanwhile amorphous silicon thin film batteries need negative ground , in order to discharge static electricity and prevent common mode voltage to ground exceeds the system voltage and the inhibition photovoltaic array panels on the distributed capacitance of the micro grid tie inverter control circuit common mode interference. So you must use an internal or external transformer isolation ( including step-up transformer ) for grid inverters , grounding lines need to add DC leakage protection device to protect the personal safety.

Negative ground is not grounding lightning protection components , but mainly to prevent static electricity , so you can use indirect grounding method , using a large value resistors indirectly grounded to avoid a direct cause and without grounding transformer -isolated off grid inverter incompatibility problems . Since the grounding resistor through the actual current is very small, will not cause the inverter without transformer -isolated DC leakage alarm, while the DC grounding line leakage protection settings can play a small role in protecting the safety of personnel .

The only downside is indirectly grounded in the inhibition of cell panel distributed capacitance of the inverter reduces common mode interference aspect , and this problem can be reduced distributed capacitance ( eg with no border component ) and the inverter internal circuitry to improve noise immunity resolved, and now most of the inverter can be fit.

August 7, 2012 , good news came from Golmud in Qinghai , XJ XJ Group subsidiary FACTS company developed 500kW photovoltaic inverter, with good health , the Yellow River in China Power Investment 200MW PV power plant site low voltage ride through testing, frequency disturbance test , power disturbance test trials, the first time passed .

It is understood that the PV plant in Qinghai Province field test requirements are very strict , low-voltage test will be conducted through the overloaded more than 70 times . Up to now, XJ Group in more than a dozen well-known brands of PV inverter manufacturer , becoming the first low- voltage ride through on-site testing is one of the few manufacturers . At the same time as an all -time field tests were successfully passed the PV inverter manufacturer , has been highly recognized field testers and praise .

XJ Group as a leading enterprise in the domestic power equipment , production lines for all products under the relevant test is particularly seriously. Xu Jiguang volt grid-connected inverter , following the first in the country through the State Grid EPRI National Energy solar power research and development ( experimental ) low voltage ride through the center (LVRT) full-function type test after he successfully passed another country scenery storage transmission demonstration project , Zhang north wind power test base

Golmud in Qinghai photovoltaic power plants and other projects live low voltage ride through pilot testing and other relevant national authorities of detection . Fully proved Xu Jiguang volt grid inverter dc to ac inverter has fully complied with the national grid and network requirements , but also the users and the testing organization for more than 40 years of XJ Group power electronics product development and technological innovation is highly recognized .

Along with the financial support of distributed PV policies , distributed photovoltaic applied into the outbreak . Three crystal grid-connected photovoltaic inverters also successfully applied to municipal household PV roof project , by the users of praise.

Recently, three crystal grid-connected photovoltaic inverter again successfully used Yancheng first home photovoltaic power generation project . And the project back in early July this year has started to build a total of 36 PV modules installed , each power of 280 watts, the entire device area of ​​60 square meters. By the end of July with the owners Choi Yancheng power company signed a " purchase " agreement .

However, the system has been running for some time, Mr. Choi found no generating capacity of the system to achieve the desired effect , found after three crystal Electric Company , through contact with the company's staff to communicate , our technicians recommend Mr. Cai increased two PV modules , matched crystal 10Kw three phase grid PV inverter which replaces the previously provided by others 10Kw frequency inverter with charger with isolation transformer , after three crystal electrical technicians Choi home system optimization, now the system is generating a day , 20% higher than before so, thus greatly reducing the return on investment of time .

Mr. Choi is now home PV system has been running for almost a month , the amount of power so far in September there 750kWh, which makes Mr. Choi excited. This time he gave facelift own system again attracted various media and local villagers onlookers. Below media scene :

Leaving Choi excited three crystal photovoltaic inverter is not only efficient, but also monitor mode is also very convenient and user friendly . Choi want their own system before the daily power generation also need to go to see the display of the inverter , and now Crystal Electric inverter built-in RJ45 interface connected to the Internet , Mr. Cai through computers, mobile phones ready for remote monitoring . Below September screenshot generating capacity of the system :

It is reported that nearly three years of distributed PV showing explosive growth. National publication of the relevant planning proposed in 2015 to be distributed PV to reach 10 million kilowatts. At the same time , clearly encourage construction in the eastern region combined with the construction of distributed photovoltaic power generation system. Therefore , distributed photovoltaic power generation is an important future direction of development.

The next three years , three Crystal Electric is committed to a new string type PV inverter R & D, through technical innovation to further reduce costs and increase inverter reliability , as co-founder enjoy green homes contribute to a force !