About YIY Energy Storage - Company Profile and History

Zhejiang YIYEN Holding Group, headquartered in Lishui, Zhejiang, is a national high-tech enterprise and a provincial-level "Specialized and Sophisticated" enterprise dedicated to the R&D and manufacturing of high-power power electronics, power quality management, energy storage and mobile power supply systems. The group platform was established in 2022, with core subsidiaries including Lishui YIY Tech. Co., Ltd., Nanjing Shuowei Tech. Co., Ltd., Hangzhou Weiyao Tech. Co., Ltd., Wenzhou YIYEN Supply Chain Management Co., Ltd., and Wenzhou YIYEN Energy Development — covering R&D, manufacturing, supply chain, and energy services — thus forming an integrated industrial cluster encompassing R&D, production, sales, and service. The Group's core business segments are three main lines: power quality systems, commercial & industrial (C&I) energy storage systems, and vehicle-mounted & mobile power supply systems. It has self-developed core technologies including PCS, BMS, SVG, APF, voltage regulation, DC-coupled PV-storage architectures, SiC power conversion, EMS energy dispatching, grid-connected/off-grid diesel hybrid systems, and specialized vehicle-mounted power supply. The Group possesses full capabilities in system solution design, complete machine manufacturing, EPC delivery, and long-term energy operation & maintenance (O&M) services.

Technology DNA: The Group started with power quality management, which remains its deepest moat. Evolving from passive compensation, active filtering, static var generators (SVG), and high-precision voltage stabilization to integrated power quality + energy storage solutions, it naturally differentiates itself from pure battery integrators, championing the distinct strategy of "energy storage is not just about storing electricity, but also about managing power quality". Product Portfolio: Covers distribution network side, industrial users, data center campuses, mining and island applications, specialized vehicle-mounted systems, and mobile power for RVs, emergency response, and telecommunications. Hardware is self-developed and controlled, with independently defined topologies. Key offerings feature 1500VDC high-voltage platforms, DC coupling, string-type distributed architectures, liquid cooling/constant-temperature thermal management, EMSU cluster-level control, station-level EMS, and grid-interactive systems supporting VPP, AGC, and AVC.

Products have been deployed in multiple provincial and municipal power grids, high-energy-consuming factories, data centers, and industrial/commercial microgrids across China. Overseas business covers Southeast Asia, Central Asia, the Middle East, Africa, and South America (Colombia, Madagascar, etc.), with products exported to over 130 countries. The Group has established a dual-market structure (domestic + overseas) and possesses import/export capabilities as well as localized overseas delivery capacity.

The Group adheres to value-based operations, rejecting low-price competition and avoiding a pure equipment-margin model. Instead, it generates sustainable revenue through system solutions, integrated power quality management, energy O&M, full-lifecycle services, and VPP aggregation operations. It is positioned as a comprehensive system service provider of "power electronics + energy storage + mobile energy" under the new power system paradigm.