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Bridge

Introduction

Modular Sodium-Ion Battery Energy Storage

Bridge™ is ESS’s modular, integrated AC sodium-ion battery energy storage system designed for utilities, AI data centers, commercial and industrial facilities, and critical infrastructure. Delivering up to 16 hours of energy storage in a scalable, plug-and-play platform, Bridge provides a safer alternative to conventional lithium-ion batteries while reducing operational complexity and supporting long-term energy resilience.

Why Choose Bridge?

More value. Greater flexibility. Less risk.

As energy demand grows and infrastructure evolves, battery storage must do more than simply store electricity. Bridge is engineered to improve safety, simplify deployment, and provide the flexibility needed for today’s highest-growth applications.

Non-Lithium Technology.

Non-lithium sodium-ion technology

Flexible-Duration Energy.

Capable of short duration power applications and up to 16-hours of energy

Modular, Scalable Design.

Modular, stackable architecture

Reliable Temperature Performance.

Superior performance in a wide range of temperatures—without complex cooling or the fire risk associate with lithium-ion

Long-Term Maintenance Simplicity.

20-year design life eliminates augmentation risk and makes maintenance simpler

Safer by design.

Bridge eliminates the thermal runaway risks associated with conventional lithium-ion batteries and operates using simple forced-air cooling.

The result is lower operational complexity, reduced maintenance requirements, and improved safety for demanding environments. The system is designed to operate from -40°C to 50°C, making it suitable for a broad range of climates and applications.

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Built for What's Next

Built to power critical infrastructure.

As energy demand grows and infrastructure evolves, battery storage must do more than simply store electricity. Bridge is engineered to improve safety, simplify deployment, and provide the flexibility needed for today’s highest-growth applications.

Built for Modern Energy Infrastructure.

Bridge combines advanced sodium-ion battery technology with ESS’s expertise in system integration, battery management, and energy management software.

Each modular 1.2 MWh building block arrives as a fully integrated AC battery system, simplifying transportation, installation, and project expansion. Stackable modules can deliver up to 4.8 MWh in the footprint of a conventional 20-foot battery container, enabling customers to maximize site utilization while scaling capacity as needs grow.

Built for Energy Security & Supply Chain Resilience

Bridge is designed to help customers reduce exposure to global supply chain uncertainty with a U.S.-aligned sodium-ion energy storage solution. By leveraging abundant materials and a diversified supply chain, sodium-ion technology reduces dependence on constrained critical minerals and geopolitical hotspots associated with conventional battery technologies. ESS’s approach supports customers seeking energy storage solutions that can help address Foreign Entities of Concern (FEOC) requirements, strengthen domestic energy infrastructure, and provide greater confidence in long-term project development.

Why Sodium-Ion?

Safer, more resilient energy storage.

Sodium-ion batteries provide a safer, more sustainable alternative to lithium-ion technology using abundant, widely available materials. The chemistry supports resilient supply chains, reduces dependence on constrained critical minerals, and offers excellent performance across a wide range of operating conditions with reduced cooling requirements. As demand for energy storage continues to accelerate, sodium-ion technology provides utilities and infrastructure owners with a reliable platform for long-term deployment.

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Ready to Build What's Next?

Whether you’re powering AI infrastructure, modernizing the electric grid, or lowering energy costs for commercial operations, Bridge delivers the flexibility, safety, and performance needed to meet tomorrow’s energy demands.

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News

investing.com

ESS Signs 500 MWh Deployment Agreement

ESS has signed a Letter of Intent with Juniper Energy for the deployment of 500 MWh or more of sodium-ion battery energy storage systems, marking a significant commercial milestone for the company’s growing non-lithium energy storage portfolio. The agreement establishes a framework for long-term collaboration, beginning with a…

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