
NINGBO JINYUAN (G.S) ELECTRICITY CO., LTD. manufactures voltage stabilizers, transformers, and power supplies under the Goldsource brand, combining product breadth with a quality-focused management system.
NINGBO JINYUAN (G.S) ELECTRICITY CO., LTD. is a large-scale manufacturer in Ningbo, China, integrating R&D, sales, and technical service for power supply products. Operating under the Goldsource brand, the company positions quality and service at the center of its customer commitment.
The product portfolio covers voltage stabilizers and contact voltage regulators, step-up/step-down transformers, voltage converters, DC regulated power supplies, battery chargers, DC-DC converters, DC-AC inverters, switch power supplies, PA amplifiers, AC/DC adaptors, educational power supplies, satellite antennas, and plug adaptors.
With years of self-operated import and export experience, the company serves both domestic and overseas customers and continues to expand its international presence. Its management and quality system foundations are supported by ISO 9000 certification and a range of product safety approvals.
The company has received multiple local and regional enterprise recognitions in Yuyao, Ningbo, and Zhejiang, reflecting its scale, performance, and export activity.

A large-scale industrialized enterprise integrating research and development, sales, and technical service for power supply products in Ningbo, China, serving customers at home and abroad.
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The product range spans 12 categories, 27 series, and over 200 varieties, supporting diverse voltage regulation, conversion, and power supply applications.
Operates with years of self-managed import and export experience and continues to develop its international market presence.
Guided by the motto “We mean what promised based on the high quality,” the company emphasizes modernized management and consistent product quality backed by system certification and safety approvals.
Booster products have been recognized as a famous brand in Ningbo and a local famous product in Zhejiang Province.