About Us

About Us

Basic Introduction


YIYEN HOLDING GROUP is a high-tech enterprise dedicated to the research and development and intelligent manufacture of electronic and electrical technologies, providing core power equipment and system solutions for the Internet of Things for Energy. At present, Yiyen company owns holding companies such as Yiyen Electric Technology Co., Ltd., Shenzhen Yiyen Electric Technology Co., Ltd. , and Lishui Yiyen Electric Technology Co., Ltd. It mainly manufactures Inverter (INV), LiFePO4 Battery Pack (LFP), Energy Storage System (ESS) , Solar Charger controller (MPPT) , AC Charger (CSB) , Automatic Voltage Regulator (AVR) , Power Convert System (PCS) , Active Harmonic Filter (AHF) , Static Var Generator (SVG) , Power Quality Correct Device (SPC) and other series products. YIYEN HOLDING GROUP upholds the business philosophy of “seeking benefits with quality and development with technology”.



Quality management is the foundation of the development of Yiyen.We control the product quality by constructing a strict quality management system, and has passed certification from international standardized management systems such as the ISO9001 international quality system and safety management system. The main products have obtained certifications of CE , TUV , MSDS ,UN38.3 ,etc. Technological innovation is the core of the Yiyen’s development. Yiyen equipped with two R&D teams (they are in Shenzhen and Nanjing respectively), and has research cooperation with Tsinghua University and Hohai University. Yiyen has obtained more than 60 product patents. It not only guarantees the advance and innovation of products, but also can continuously bring out more competitive products to meet the market demand on reliability, intelligence and environmental protection of electrical products from customers.


Company Personnel


Years Production Experience


Unit Shipments

130+ Countries

Global Deliveries


R&D Personnel

Product Applications

YIYEN HOLDING GROUP will serve the users with heart, and truly benefit society with sincerity, carefully cultivate the “Yiyen” brand, create the “Yiyen” culture, and make energy and ecology more harmonious.

Yiyen’s products have been widely used in important fields such as education system, telecommunication, power system, transportation, government agency, bank security, scientific research, medical institution, military and large industrial and mining enterprises. At the same time, YIY brand has successfully registered in more than 60 countries through the Madrid trademark. Now, Yiyen customers & users have covered more than 100 countries and regions around the world, which has laid a solid foundation for YIY’s globalization.

Perfect Engineering Service System

R&D Team

Professional and efficient R&D team


One-stop system solution

Response Speed

Timely and efficient response speed

Training Service

One-to-one training service