NOVI, Michigan – [Date], 2026 — A123 Systems, a global leader in advanced lithium-ion battery technology, and Nuvation Energy, a leading provider of battery management and energy control solutions, today announced an integrated battery pack and battery management system (BMS) solution designed to simplify deployment and accelerate time-to-market for utility-scale energy storage projects.

The solution combines A123 Systems' 52S liquid-cooled battery pack with Nuvation Energy’s UL Recognized G5 Battery Management System, providing battery energy storage system (BESS) manufacturers, integrators, and developers with a streamlined path to system integration.

Designed for 1500V DC energy storage architectures, the integrated solution comes pre-configured with Nuvation Energy’s G5 Level 1 BMS and is designed for compatibility with Nuvation Energy’s G5 Stack Switchgear. By reducing integration complexity and engineering effort, customers can move more efficiently from system design to deployment.

As energy storage projects continue to scale in size and complexity, developers and system providers are seeking solutions that simplify deployment while addressing evolving cybersecurity considerations, supply chain priorities, and regional regulatory requirements. The collaboration between A123 Systems and Nuvation Energy helps meet these needs through a purpose-built, integrated platform designed for large-scale energy storage applications.

The announcement builds on a long-standing collaboration between the two companies, which together have supported hundreds of megawatt-hours of deployed energy storage systems across commercial and utility-scale applications.

“A123 Systems has built an impressive battery pack for utility-scale energy storage,” said Michael Worry, CEO & Founder of Nuvation Energy. “By combining A123’s proven battery technology with our UL Recognized G5 BMS, customers gain a pre-integrated solution that simplifies system design and helps accelerate the deployment of large-scale energy storage projects.”

The integrated solution combines A123 Systems’ battery technology with North American-developed battery controls, helping customers address evolving market requirements without introducing unnecessary integration complexity.

“As the energy storage industry continues to evolve, customers are increasingly looking for solutions that strengthen cybersecurity, support local supply chain strategies, align with regional regulatory requirements, and simplify deployment for large-scale utility projects,” said Manuel Spitzlay, Senior Director of Sales at A123 Systems. “Our collaboration with Nuvation Energy helps address these priorities by delivering an integrated, purpose-designed solution built to support the reliability, scalability, and performance needs of utility-scale energy storage.”

About A123 Systems

A123 Systems is a trusted global innovator in advanced lithium-ion battery technology and energy storage solutions, serving leading automotive and energy customers across North America and Europe. With more than two decades of continuous innovation in materials science, manufacturing, and intelligent control systems, A123 delivers the performance, safety, and reliability demanded by modern mobility and energy applications. Learn more at www.a123systems.com.

About Nuvation Energy

Nuvation Energy provides battery management and energy control solutions for large-scale energy storage systems. With BMS technology in development since 2008 and products deployed at scale since 2015, Nuvation has supported hundreds of commercial, industrial, and utility-scale energy storage installations worldwide. Nuvation’s core BMS products are UL 1973 Recognized and are designed, engineered, and manufactured in North America.