Community of green energy, renewable power, electrical machinery, automation, process control...

But where's the market for frequency inverter?

I think different demands exists in different areas. The requirements for frequency inverter in Japan may be different from that in India. The requirements for frequency inverters in USA are different from Mexico. So different qualities meet the demands of different countries because of the cost.

The market for low power AC drives in India exceeded $150 million in 2006. According to a ARC Advisory Group study, the market for low power ac drive in India will grow at a compount annual growth of 15.4% from 2007 to 2011 because of the country's growing manufacturing sector. You can refer to the study here: the article in our Automation and Control Forum. And experts believe that suppliers of low power ac drives are benefiting from the increasing level of automation in manufacturing, leading to a greater use of low-power AC drives in industries such as automotive, mining & metals, printing and publishing, and textiles, for applications such as conveying and material handling, fans, pumps, and compressors.