Chongqing SRJ Technology Co., Ltd. specializes in the Electrical Industry, dedicated to the development of VFD converter, Inverter, Main Board, Off-grid Solar Inverter, Gasoline Generator. Factory blueprint Development of energy storage systems for home, commercial and industrial, and utility users. With a professional development and research team, continuous product development to meet customer needs. All our products have 12 months warranty and lifetime maintenance. In addition, the instruction manuals are available in different languages for your convenience. In this field, we have passed CE, FCC and RoHS certifications.