The large and medium-sizedseries inverter of Sofar Solaris widely used in more than 60 countries and regions around the world. It is not only regarded as an “ice breaker” to improve the power generation, but also the most effective means to reduce the investment cost of owners. It also has a decent market performance in the harsh installation environment, and wins the favor of the market and users.
In 2018, in order to cope with the harsh requirements of the severe environment on the inverter, make up for the faults in the power section in the market, and meet the demands of domestic and foreign users for large and medium-sizedseriesinverters, the 50-70kw large and medium-sizedseriesinverter independently developed and designed by Sofar Solarofficially went on the market, and subsequently accepted a series of tests in harsh environment, such as drought, humidity, sand and other installation environment.
Now, the machine has been running for more than two years, and it has been running stably in the 50MW agricultural project in Gujarat, India, the 50MW poverty alleviation project in Henan, the 20MW barren mountain project in Brazil, the 10MW tidal flat project in South Korea, 1.2MW sewage treatment plant in Zhejiang, etc. Sofar Solar ‘s 50-70kw inverter really did it: stable operation in harsh environment is not inferior, and owners’ choice and theirinvestment returnare guaranteed..
1、Avoidance of PID Effect
The installation of photovoltaic power station in humid environment causes PID Effect to become a fatal killer of the power station’s revenue. Thiseffect willnot only lead to the decline ofcomponent output powerand affect the amount of power generation,but also shorten the life of the powerstation, so it is constantly criticized.In the process of designing and developing inverters, Sofar Solarhas taken these factors into consideration and taken effective measures from the inside, so as to avoid PID Effect more safely,achieve active fault isolation, and reduce the occurrence probability of this effect.
2、Solution of HarmonicResonance
Some power stations are installed in mountainous areas with complex environment, and the array is spaced back and forth.When multiple inverters are connected in parallel, it is easy to lead to grid sheddingand vibration, which affects the power quality, and even bring security risks to the gridin serious cases.Sofar Solar’s inverteradopts intelligent control and has self-adaptive function, which solves the problem that the inverter is easy to oscillate when multiple inverters are connected to the same network.This can not only output better power quality, but also better meet the requirements of grid access.
3、Strict ControlofQuality
Sofar Solar always adheres to the quality control, and adopts 6 strict 100% factory inspections internally, involving component materials, aging, sealing and other links. At the same time, the selection of component suppliers is also layer by layer. At present,the suppliers are allworld-class brands, aiming to improve the quality, reduce the failure rate, and ensure the stable operation of the machine in the harsh environment.
4、Guarantee of Efficiency
The selection of T-type three-level inverter is a major innovation highlight of large and medium-sizedseries inverterof Sofar Solar, which makes the machine more reliable and efficient during operation. Anda large number of silicon carbide devices are used insideto ensure the good heat dissipation performanceof the machine, and the efficiency is increased by more than 0.3%. In addition, the wide range of voltagesbetween 250Vand 960Vandthe real-time and accurate MPPT algorithm ensure the high output of the inverter and the maximum profit of the power station.
5、High Levelof Protection
The operation of the large and medium-sizedseries inverter of Sofar Solaris not inferiorin the harsh environment, and the key point is to do a good job in protection. This series of machine hasoutdoor IP65 protection leveland can adapt to most severe weather. At the same time, the machine adopts built-in input DC secondary lightning protectionand built-in anti reverse diodes, controlling the component current flowin a friendlyway and protectingthecomponents from damage. In addition, it also has the functions of AC surge protector, audible and visual alarm, etc.
Adhering to strict quality control, continuous technological innovation, and increased internal protection have established Sofar Solar’s mainstream position in the large and medium-sized series inverter market. In the future, Sofar Solar will still focus on innovation and development, pursue quality products, seek new commanding heights in quality and efficiency, create more value for customers, and lead the market development .
