Largest 400V Grid-Connected Industrial Energy Storage Station Launched with 10.2MW Capacity in Anhui

A major milestone has been achieved with the official launch of a 10.2 MW/21.318 MWh energy storage power station in Anhui Province, which represents the largest single-unit capacity using a 400V grid connection in the industry. This landmark project not only verifies the feasibility of large-capacity low-voltage grid-connected energy storage but also sets a benchmark for energy transformation in high-energy-consuming enterprises through innovative comprehensive energy storage solutions.

The project is located at the Anhui Yongheng Power Technology Co., Ltd. facility, part of the Chaowei Group’s manufacturing base in Anqing. It has been invested and operated by Zhejiang Chaowei Power Co., Ltd. The system features 68 Zhihui energy storage units, each with a capacity of 150 kW/313.5 kWh, utilizing a 400V grid connection to the park’s distribution system. The total installed capacity reaches an impressive 10.2 MW/21.318 MWh, supported by the Zhihui energy storage manager’s 24-hour active operation and maintenance center, which provides full lifecycle operational services.

Technical Highlights

• The project utilizes the industry’s first self-developed AC400V output 150 kW energy storage inverter, which directly matches the existing distribution system without the need for step-up transformers or long-distance wiring. This significantly reduces initial investment and energy losses during charging and discharging.
• Each energy storage unit occupies only 1.3 square meters, achieving a high energy density of 241.1 kWh/m². This is a notable improvement compared to commonly available products of 125 kW/261 kWh, which have a reduced overall construction cost by 4-5 cents/Wh.
• The efficient and flexible modular design, along with a front-maintenance distributed solution, effectively addresses the challenges of limited space and land availability in the park, making system expansion and future maintenance more convenient.

Rapid Delivery

The entire process from equipment shipment to formal commissioning took less than one week, showcasing a compact and orderly workflow. In some cases, a single site was operational in as little as three days, demonstrating the team’s exceptional professionalism and efficient collaboration.

Project Value

After the project became operational, it is expected to provide approximately 10 million kilowatt-hours of peak power support annually, saving over 7 million yuan in electricity costs each year. Moreover, through demand management, it effectively reduces peak electricity usage and lowers basic electricity fees. Financial calculations indicate that the investment payback period is just three years. Once integrated into a Virtual Power Plant (VPP) platform, the project’s revenue potential will expand from simple peak-valley trading to include diversified revenue streams such as market trading and ancillary services, thus achieving long-term stable economic value.

Future Outlook

As photovoltaic technology and energy storage continue to converge, along with the maturation of Virtual Power Plant technology, commercial energy storage is set to create multidimensional value, becoming a key driver for enterprises’ low-carbon transformation. The successful operation of the Chaowei Power production base project not only establishes a demonstration model for large-capacity low-voltage grid-connected energy storage at the user side but also reflects Huazhi Energy’s commitment to the mission of “allowing free energy to serve every enterprise.” This initiative injects significant momentum into the cost reduction and efficiency improvement of China’s real economy and promotes green, sustainable development.

About Huazhi Energy

Huazhi Energy is an innovative new energy technology company focused on the research, development, sales, and productization of core energy storage equipment and solutions. With over a decade of expertise in energy storage, photovoltaics, wind power, charging stations, and artificial intelligence, the expert team addresses energy storage challenges and demands in commercial applications. Their mission is to provide efficient, intelligent, safe, and reliable energy storage solutions for the future. Currently, the Zhihui energy storage product has over 1,300 operating sites.