WindSun products are used in No. 2 Line, No. 3 Line, No. 11 Line and No. 13 Line, four metro lines that are operated in Qingdao. For No. 13 line, WindSun assisted Qingdao Metro in testing 1180V braking energy absorbing devices.

WindSun takes the leadership in drafting national standard for braking energy absorbing devices and plays a major role in drafting industrial standard for electricity quality governance products.

According to 2018 Electric and Mechanical Products for Chinese Urban Rail Transit Systems: Market Development Report available on www.rail-transit.com, regenerative braking energy absorbing devices (inverter type, energy storage type and resistor type) manufactured by WindSun have been widely applied in urban rail transit systems in Tianjin, Chongqing, Beijing, Chengdu, Nanjing, Zhengzhou, Qingdao and Ji’nan. In particular, Phase 1 and Phase 2 projects for No. 5 line in Chengdu Metro has established a milestone in China for application of these devices: the longest distance, the most stations and the largest capacity. According to the market research, WindSun takes over 50% of the market for braking energy absorbing devices.