Deyang, Sichuan, China – December 26, 2025 – Deyang Rata Technology Co., Ltd., a leading load bank equipment manufacturer of high-performance load banks and power testing solutions, today announced the successful customization and delivery of a 3600 kW 950 VAC resistive load bank for a key Chinese energy storage system integrator, Sunlead Intelligent (name withheld for confidentiality). This strategic collaboration marks a milestone in advanced testing support for large-scale energy storage systems and reinforces Rata’s position as an innovator in the energy testing equipment market.
In May 2025, Sunlead Intelligent — a prominent player in China’s energy storage integration sector — selected Rata to design and manufacture a bespoke resistive load bank tailored specifically for discharge performance testing of its energy storage systems. The large-scale resistive load is a critical testing instrument that simulates real-world electrical loads to validate system performance, reliability, and safety under controlled conditions.
Meeting Complex Needs with Customized Engineering
The customized Rata load bank, rated at 3600 kW and 950 VAC, is intended for full discharge testing of battery systems coupled with power conversion systems (PCS). Such testing ensures that energy storage installations perform reliably under heavy load conditions — a key requirement as energy storage supports grid stability and peak demand applications worldwide.
One of the standout technical features of this bespoke solution is its enhanced control logic for load operation. Rata engineers implemented a safety-oriented logic sequence that requires an alarm condition to persist for at least five seconds (excluding line faults) before initiating shutdown. This ensures that the PCS discharge equipment disconnects first, greatly improving operational safety and protecting the test platform from potential damage during fault conditions.
In addition, Rata’s technical team integrated high-reliability components, including Siemens Sirus series 1000V contactors, to ensure dependable on-off operations within high-voltage test environments. Robust all-copper busbars were also utilized to optimize current transmission and minimize the risk of overheating in the main circuit, contributing to long-term system stability and reliability.
Customer Feedback and Benefits
According to feedback from Sunlead Intelligent engineers, “The control operation is simple and intuitive, and the product performance is reliable.” This reflects the success of Rata’s design philosophy — delivering products that blend robust engineering with user-friendly control systems. The positive customer feedback underscores not only the quality of the equipment delivered but also Rata’s responsiveness to highly specific testing requirements.
The successful implementation of this custom load bank also demonstrates Rata’s ability to advance energy storage system testing capabilities, particularly as the industry continues to scale up storage capacities across China and globally. Advanced load banks such as this are becoming indispensable tools for verifying the performance of energy storage systems before they are deployed into utility-scale operations or commercial use.
About Deyang Rata Technology
Founded in 2013 and based in Deyang City, Sichuan Province, Deyang Rata Technology Co., Ltd. specializes in the research, development, and manufacturing of a full range of load bank equipment. With a focus on mission-critical sectors such as energy storage, renewable energy, data centers, power infrastructure, marine platforms, and aerospace applications, Rata has built a reputation for delivering high-quality, customizable solutions engineered to exacting industry standards.
Over its decade of operation, Rata has grown its global footprint, serving customers across six continents and building long-term partnerships in more than 40 countries. The company’s product portfolio includes resistive, reactive, RLC, rack-mounted, liquid-cooled, and electronic load banks, each tailored to support diverse testing and simulation scenarios.
Rata’s commitment to innovation is reflected in its extensive intellectual property portfolio, which includes numerous utility model patents, invention patents, and software copyrights. With ISO-certified quality systems and a seasoned team of technical experts, Rata continues to push the boundaries of load bank technology and performance.
Media Contact
Company Name: Deyang Rata Technology Co., Ltd.
Contact Person: Gong Zhenhua
Email: Send Email
Country: China
Website: https://www.cnloadbank.com