Hangzhou Heller Science & Technology Co., ltd is a professional manufacture of various generator production, sales and maintenance, corporate HQ is located in hangzhou city which owns the reputation of the paradise of the world, with factory area of 60000 M2, and more than 20000 m2 modern workshop equipped with many kinds of advanced producing, machining and testing equipment. We are the OEM of well-known international and domestic manufactures: USA Cummins, UK Perkins, Volvo, Weichai, Stanford