KOLKATA, February 25, 2026 – Delta Electronics India, a leading provider of power management and smart green solutions, announced today the successful implementation of a 6.4 MWh/4 MW Battery Energy Storage System (BESS), which was today inaugurated by Metro Railway Kolkata at the Central Sub-station of the Blue Line. With this milestone, Kolkata Metro becomes India’s first underground metro railway to adopt a large-scale Battery Energy Storage System to enhance operational resilience and energy efficiency.
Niranjan Nayak, Managing Director, Delta Electronics India, said, “The deployment of our Battery Energy Storage System reflects Delta’s vision of enabling safe, resilient, and energy-efficient power solutions for critical public infrastructure across India. We are proud to support Kolkata Metro while demonstrating how our energy storage solutions play a vital role in strengthening India’s urban transport infrastructure, especially by strengthening reliability in underground metro operations where uninterrupted power supply is essential.”
Integrated at the Central Sub-station of the Blue Line, the newly operational system has been designed and delivered to enhance network preparedness against grid disturbances and power-related contingencies. Furthermore, it enables Kolkata Metro to draw immediate traction power support during grid failures or power interruptions, allowing passenger-carrying trains to be safely hauled to the nearest station.
Rajesh Kaushal, Vice-President, Energy Infrastructure Business Group, Delta Electronics India, added, “The fully integrated BESS combines high-efficiency power electronics with Lithium Iron Phosphate battery technology to deliver rapid response during grid disturbances. In addition to emergency traction support, the system enables peak power management, power factor improvement, driving sustained operational efficiency. All the critical components in this solution (PCS, EMS & Battery Racks) are designed, developed & manufactured inhouse within Delta giving us an edge over the design, quality, reliability & long-term sustainability of the solution for such critical applications.
The project aligns with the National Programme on Advanced Chemistry Cell (ACC) Battery Storage approved by the Union Cabinet, supporting India’s broader objectives of strengthening energy storage infrastructure and advancing sustainable electric mobility across critical public transport systems.
With this inauguration, Kolkata Metro sets a benchmark for the adoption of large-scale battery storage in metro rail systems, while Delta Electronics India reinforces its leadership in delivering safety-critical, energy-resilient power solutions for high-density urban mobility networks.
About Delta Electronics India
Delta Electronics India Private Limited, is a leading power and energy management company in the country. Delta operates in three business categories: Power Electronics, Automation and Infrastructure. It has a legacy of operating in India with market leadership in Telecom Power Solutions, Renewable Energy Solutions and Display Solutions. It is also a leading provider of Industrial Automation Solutions, UPS & Datacenter Solutions, EV Charging Solutions, Rail Transportation Solutions, Energy Storage Solutions, DC Fans & Blowers, and Components. With fourteen regional offices, manufacturing facilities in Rudrapur, Gurgaon and Krishnagiri, and two R&D centres (Gurgaon and Bengaluru), Delta has a strong presence across India with more than 200 channel partners. The company has been awarded ISO 9001:2015, ISO 14001:2015 and OHSMS 45001:2018 certifications for Quality Procedures and Environment management. For detailed information, please visit: www.deltaelectronicsindia.com
About Delta
Delta, founded in 1971, and listed on the Taiwan Stock Exchange (code:2308), is a global leader in switching power supplies and thermal management products with a thriving portfolio of IoT-based smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its ESG-embedded business model to address key environmental issues, such as climate change. Delta serves customers through its sales offices, R&D centers and manufacturing facilities spread over close to 200 locations across 5 continents.
Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies and dedication to ESG. Since 2011, Delta has been listed on the Dow Jones Best-in-Class World Index (formerly the DJSI World Index of Dow Jones Sustainability™ Indices). Delta has also won CDP with double A List for 3 times for its substantial contribution to climate change and water security issues and has been named Supplier Engagement Leader for its continuous development of a sustainable value chain for 8 consecutive years. For detailed information about Delta, please visit: www.deltaww.com