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Technology

Our zinc-based static battery technology is a proven storage solution with active systems deployed around the world.

Our zinc-based static battery technology is a proven storage solution with active systems deployed around the world.

Eos Znyth™ 2.3

Overview Performance Specs

Three proprietary components.
One ingenious design.

With more than 95 patents pending, published, or issued, our static Znyth battery design includes just three simple components: an aqueous electrolyte, bipolar electrodes, and polymer frames.

technology
High-performance aqueous electrolyte

Our proprietary blend of water, zinc halides, additives, and buffering agents make up the Znyth aqueous electrolyte. The formula both enhances zinc solubility and plating and eliminates the dendrite and densification issues that can lead to performance decay and safety hazards.

Non-degradable bipolar electrodes

Titanium anodes (+) coated with our proprietary ceramic conductive material and carbon-felt cathodes (-) make up the Znyth electrodes. They’re mechanically tough, corrosion resistant, and chemically stable, delivering for years with virtually no degradation. Plus, our bipolar structure simplifies internal battery connections to reduce internal resistance and improve round-trip efficiency.

Fully-sealed polymer frames

Injection-molded thermoplastic polymer frames provide the structure for our internal electrochemical cells. Our streamlined design requires just 40 of them, infrared welded to two end caps, to form the sealed exterior of the Znyth 2.3 battery, minimizing materials, manufacturing, and maintenance.

Inspired by zinc plating baths

Znyth batteries store electrical energy through zinc deposition. Our aqueous electrolyte is held within the individual cells of the battery, creating a pool that provides dynamic separation of the electrodes. During charge and discharge, ions move through the electrolyte to their respective electrode to donate or accept electrons, creating a current flow through the bipolar stack.

Inspired by zinc plating baths

Realizing the full power of zinc.

Our Eos Znyth technology is as high-performing and price-competitive as leading industry storage solutions in the intraday market. But Zynth’s proven, zinc-powered chemistry delivers significant additional operational advantages to 3- to12-hour discharge duration, intraday applications that others can’t.

Simple

Fully sealed. Long lived.

Each Znyth battery module is a self-contained unit, a closed-system design with no moving or delicate parts, so they’re as easy to maintain as they are to manufacture. And they can last at least 6,000 cycles—almost twice the operational life of most conventional battery chemistries.

Lifespan
20+ years
at least 6,000 cycles

Safe

Non-flammable. Non-corrosive.

Znyth batteries are inherently safe to use. With a water-based electrolyte and flame-retardant polymer framing, there’s no risk of thermal runaway. When fully charged, they’re at most mildly acidic (pH 2-4 range). And even when over-charged, only negligible levels of hydrogen are off-gassed.

Certified to the
UL1973
Batteries in Stationary Applications standard

Durable

High tolerance. Low degradation.

No matter what conditions our Znyth batteries face, they keep on going—even fully recovering from 90⁰C+ abuse cycles with just a simple, short rest period—with no change to their overall degradation curve. Which, at less than 9% over the first 3 years and then zero thereafter, is well below conventional standards.

Retains
>91%
of rated capacity over product lifespan

Flexible

Variable DoD. Variable duration.

The Znyth chemistry is highly tolerant of significant variation in operational requirements. A module’s storage duration can range from 3 to 12 hours, with no impact on degradation. And the maximum DoD can be reduced for applications demanding round trip efficiency in the mid-80s.

Maximum of
100%
depth of discharge (DoD)

Available

Reliable supply. Ethical sourcing.

Our Znyth technology requires just five low-cost, widely-used, earth-abundant commodities, that have no geopolitical issues connected to their extraction. It enables local sourcing that minimizes the risk of supply chain disruptions—and related price swings.

Approximately
80%
of materials sourced within a day’s drive

Fully recyclable at the end of their usable life, Eos batteries are a truly sustainable solution.

Fully recyclable at the end of their usable life, Eos batteries are a truly sustainable solution.

Power that stacks up.

Znyth battery modules are the building blocks of all Eos energy storage systems. Our standard 12-module strings are racked in a variety of configurations to form our Eos Cube, Eos Hangar, and Eos Stack solutions.
Znyth 2.3 single battery module specifications1
Technology

Znyth™ (Zinc hybrid cathode)

Nominal Voltage

64 VDC

Charging Voltage @ 750W

75 VDC

Voltage Range

48 to 82 VDC

Rated Power2

0.75 kW

Maximum Rated Energy

3.2 kWh

State-of-Charge Range

0 – 100%

Nominal Discharge Capacity

51.8 Ah

Nominal Charge Capacity

59 Ah

Nominal Discharge Current

12 ADC

Maximum Current

18 ADC

Nominal Charge Current

10 ADC

Short Circuit Current (pk)

425 ADC

Short Circuit Time Constant (L/R)

< 5ms

Round Trip DC Efficiency

Approximately 75%3

Self-Discharge Energy (average)

1% per hr

Certifications

UL 1973, UL 9540A

Optimum Operating Temperature
(Ambient)

10 to 45 °C

Operating Temperature
(Ambient)4

-20 to 55/65 °C (charge/discharge)

Dimensions

15.2H x 16.9W x 23.0D in
386H x 428W x 585D mm

Weight

215 lbs / 98 kg

  1. Typical ratings for 25 °C
  2. Contact Eos about Fast Charging options (1.2 kW)
  3. RTE depends on temperature, depth of discharge, use case, as well as system sizing configuration
  4. 50 °C maximum ambient temperature required to maintain UL 1973 rating

Find out how we’re ensuring continuous innovation

Research & Development

Eos Ingenuity Lab

Learn more

See how we’re building our products—and our team

Manufacturing

Eos Ingenuity Park

Learn more