1. How to select proper inverter?
Before purchasing any inverter, the following questions should be made clearly: DC voltage, loading size and type . Generally, DC voltage of the inverter has only one grade, users can choose corresponding inverter according to DC power supply. Loading size and type are the important factors that users should consider when select any inverter. Maximum output power of inverter is fixed, if choose loading with compressor, its starting power will exceed several times of rated power, so inverters with big output power have to be chosen as a result.
2. What kind of inverters?
Architectural diversity certainly results in the diversity of solar-panel installation. In order to get the highest solar conversion efficiency and make artistic architectural appearance, inverter diversity is required to realize the optimal conversion. There are several popular types of solar inverter:
Central inverter
Central inverter is generally applied in the system of large PV power plant (>10kw). Many collateral PV strings are connected to DC input terminal of same one central inverter, big-power inverter takes three-phase IGBT generally, while small-power inverters take FET. DSP conversion controller is used to improve output power quality simultaneously to make it extremely close sine wave current. The biggest feature for the system is big power and low cost. However, PV string matching and partial shadow will affect the efficiency and power capacity of the whole PV system. Meanwhile, generating reliability of the whole system is influenced by bad working condition of a certain PV unit group. The latest research is to get high efficiency with partial load by the modulation and control of space vector, as well as developing new topology connection.
Sunforest central inverter can be added an interface box of PV array to monitor PV panel strings, if one group string works abnormally, the system will send the info to remote controller, as well as suspend this string by remote control to avoid the reduction of the whole system capacity resulted from the failure of that string.
String inverter
String inverter has become the most popular inverter in the world. String inverter is based on the concept of modularization, every PV string 1kW-5kW goes through one inverter, which has MPP tracking at DC point, and is parallel connected to the grid at AC point. Many large PV power plants are using string inverters. The advantages are not being affected by shading and differences among strings, and reducing the situations of the optimal working place of solar panels.
3. Why need solar inverter?
Solar inverter is a kind of device that changes direct current to alternating current. It can provide power for AC load in the conditions of no AC. It can be applied to the following sites: 1. cars, ships and airplanes: inverter can provide power for AC load by use of DC power of these vehicles. 2. In the places of no power, inverter can provide AC for users with other generating equipment (solar energy, wind energy and all kinds of fuel generators). For example, inverter can be assorted with diesel generator to shorten working time of the generator, save fuel and reduce generating cost. 3. Provide temporary AC power by use of portable power.
DC to AC Power Inverter 1000w 2000w 3000w 4000w 5000w 6000w Hybrid solar pure sine wave inverter
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* Company profiles
Guang Zhou ESG New Energy Techology LTD sister company (Guangzhou Hengda Battery Co.Ltd). Belong ESG POWER systems group .was established in 1988, covers an area of 80,000 square meters, located in Panyu District, Guangzhou City, with a total investment of nearly 200 million yuan, annual output of 1,000,000 kVA, the largest in China one battery manufacturer.
We production of battery products are widely used in communications, power, financial systems, uninterruptible power supply systems (UPS), power plant and substation switch control, solar panels ,controllers inverter etc solar systems, emergency lighting, alarm systems, cars, ships, motorcycles, electric bicycles and other industries. Sales network covers all provinces, municipalities, autonomous regions and established offices in various places and after-sales service center.
* Main customers are: China Electric Power system and power supply companies, China Southern Power Grid, Northeast China Grid, the Northwest Power Grid, China Telecom, China Mobile, China Unicom, China Netcom, China Bank, China Industrial and Commercial Bank of China, Agricultural Bank of China, China Construction banks, Tibet light engineering, supply Titan, Shida Group, China Southern Securities, such as the Delta-CIMIC; but also open up a wide range of foreign markets, products exported to Japan, South Korea, the United States, Europe, Australia and other places.
* In November 1996 a one-time adoption of international authoritative certification body Det Norske Veritas (DNV) and the Guangdong Provincial Quality System Certification Center of the certification audit, is the national industry's first access to ISO9001 quality management system authentication of international and domestic manufacturers. Guangzhou Hengda Battery Co., Ltd always maintain the quality system is working effectively, and continuously improve the development,
* in November 1999 have again been Norske Veritas (DNV) ISO9001 quality system certification review,
* in November 2002 passed the 2000 Quality System certification.
Guangzhou Hengda Battery Co., Ltd., high-quality products have won numerous honors: in 1996 our maintenance-free lead-acid batteries by State Science and Technology "Spark Program" Outstanding Project Award;
* in October 1997 by China's Ministry of Posts and quality network card, the same year Our full range of lead-acid batteries, Guangzhou won the brand, the Company also won the title of Guangdong quality of trust companies;
* in 1999 won the national award of the export quality license, and passed the United States SGS product safety certification, EU CE certification.
* March 2001 was issued by the State Administration of Radio, Film and Television's "radio and television network equipment and devices that certificate."
* In June 2001 by China National Petroleum Corporation Pipeline Company building market access (battery item) Certificate.
* In December 2001 as "American Independent Battery Manufacturers Association International member" (the only one).
* June 2002 China Unicom supporting equipment (battery) shortlisted enterprises;
* in August 2004, the first access to the battery manufacturing business license.
* Main products, production capacity
* 10 .June 2010 won xizhang solar project
* 11.OCT 2012 We won two million dollars bid of order from state construction committee in china . Need 2years so finish the order .
* 12. JULY 2013 We won 3million dollars bid of order from Beijing government of solar street lighting of project.
* 13.August 2014. We won 1.5million dollars bid of from xinjiang solar on grid systems projects
ESG’s Sintegrity, strength and product quality obtain industry acceptance. Welcome friends from all walks of life come to visit, guidance and business negotiation.
