YX3000 series is general application VF control frequency inverters which covers such applications: Air conditioning load, Compressor load, Pump load, Music fountain load, Production line load of glass, ceramics, pharmaceutical, beverage, food, packaging, etc.

YX9000 series is high performance vector control frequency inverters which covers such applications: Crusher load, Large kiln calciner load, Rolling mill load, Hoist type load, Furnacer load, Roller type load, Crane, dump truck load, Wire drawing machine load, Delivery vehicle load, Elevator Elevated tour bus load, Stacker-reclaimer load, Mixer load, Spinning machine load, Load of laundry equipment, grinder load, Cigarette machine load, Vibration reduction and noise reduction load, Printing and dyeing machine load, Printing and dyeing machine load, Injection molding machine load, Environmental protection load such as sewage treatment, Offshore oil platform load, Electric submersible pump load ect. 

YX3900 series is special for solar pump inverters.