Eos Aurora®

Grid-Scale Energy Storage

A decade in the making, the Eos Aurora® uses proven chemistry with accessible non-rare earth components in a durable system design that’s been tested in real world deployments. It delivers results in even the most extreme temperatures and conditions and is safe, long lasting and 100% recyclable. Most importantly, it is ready to scale.

With 3-10 hours of discharge capability, immediate response time, and modular construction, the Eos Aurora DC battery system can be scaled and configured to reduce cost and maximize profitability in utility, commercial and industrial, and military market segments. The Eos solution offers many competitive advantages including a 100% depth of discharge and a wide operating temperature range to enable deployment without the use of dedicated heating or cooling.

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Low Cost/kWh

Eos is cost competitive with existing peak generation technologies.

Extreme Durability

Designed to last 5,000 cycles for a 15-year calendar life, with no subcooling or pumps required.

High Energy Efficiency

Up to 80% efficiency in 100% depth of discharge applications, Eos is one of the most efficient non-lithium long duration energy storage solutions.

100% Safe

Non-flammable aqueous electrolyte has no flashpoint; non-hazardous and non-corrosive when shipped.

Each Znyth battery is individually monitored and includes DC protection measures and a protective enclosure around the battery.

72 Batteries are placed in our outdoor-rated racking system to create the Energy Stack, the basic building block of the Eos system.

Two Energy Stacks and our DC Control Box are combined into a single subsystem. Subsystems are aggregated to meet overall capacity needs of a project.

Outdoor-rated enclosure, suitable for field installation from -25 to +40°C

Modular plug-and-play construction for the lowest on-site assembly costs

Convection cooled for installation in an open, canopy or enclosed plant site

Includes Znyth batteries, outdoor-rated enclosure, internal wiring, BMS and a one-year warranty


Znyth Zinc Hybrid
Cathode Technology

The core of the Eos Aurora® is the Znyth® (zinc hybrid cathode) battery technology. It employs inexpensive, widely available materials within a robust, scalable design to achieve long life and extremely low cost. Eos’ Znyth® technology is built on 21 patents and patent applications with over 600 claims covering cell configuration and architecture, cathode design and materials, electrolyte and electrolyte additives, battery management systems, and low-cost manufacturing processes. The result is a battery technology with unparalleled performance and market reach.

Titanium current collector

with proprietary ceramic coating is permanently conductive, non-corrosive, and self-healing

Aqueous, near neutral pH electrolyte

is non-dendritic and does not absorb CO2, eliminating carbonate clogging issues

Proprietary electrolyte additives and buffering agents

enhance zinc solubility and plating to improve energy density and run-time

Hybridization of cathode chemistries

and electro-active catalysts improves power density and roundtrip efficiency