Eos Cube

All-in-one, ready-to-run innovation.

Shipped ready for deployment, our 125kW/500kWh-rated Eos Cube comes with all battery modules, electrical equipment, and the BMS pre-integrated into a standard 10 x 20 foot ISO outdoor-rated shipping container. Loaded with our Eos ZnythTM 2.3 battery modules—the current generation of our zinc-powered technology—a single Cube includes two racks of 12-battery strings, each stacked six high, for a total of 144 Znyth batteries.

Designed to meet a wider range of needs.

Simple, safe, durable, flexible. In every aspect of our Eos Cube we’ve intentionally considered how storage will be used in a decentralized, democratized, and decarbonized energy future in which a wider range of people, across a wider range of places will be responsible for—and relying on—our systems.

Easy to install, run, and maintain.

Standard exterior venting in our fire-proof Eos Cube systems provides airflow to dissipate waste heat, eliminating the need for complicated AC systems, and since each Znyth battery is fully sealed, no flow pumps or external tanks are required. So balance-of-plant installation requirements and related ongoing upkeep are minimal.  And when it’s time for battery maintenance, access is made quick and easy through hinged doors on three sides.

Safely site in hot, dry places.

Our Eos Znyth batteries are made of and filled with non-flammable, non-corrosive materials that are less harmful than common household cleaning products. They don’t need noisy AC systems to stay cool. And they can be shipped and installed at zero charge. Which means our Cube solution can be safely transported to almost anywhere in the world without a hazmat classification, sited in hot, dry climates in both remote and densely populated places, and handled and operated with basic workplace safety procedures and equipment.


The workhorse of energy storage.

Like the Eos Znyth battery modules they house, our Cube is a self-contained unit—a closed-system design with no delicate internal or external moving parts like AC systems or flow pumps that degrade from continuous, daily wear and tear. Lasting at least 6,000 cycles and retaining a full 91% of the rated capacity, today’s Cubes will still be powering away well into the 2040s, no matter what temperature abuse or operational shifts you put them through.

Shift operational goals on a dime.

Need a maximum power, 3-hour discharge one day, and a high round-trip efficiency over a 12-hour discharge the next? No problem. Because our Eos Znyth chemistry is highly tolerant of significant variation in operational requirements, a Cube’s discharge depth and duration can be reset on a cycle-by-cycle basis. And all without any impact on the system’s total degradation or lifespan.


Ready to pair with renewable energy generation, this American-made solution can accelerate the shift to clean energy.

Ready to pair with renewable energy generation, this American-made solution can accelerate the shift to clean energy.

Power that stacks up.

Based on your power and space requirements, an Eos Cube project can range from a single to a multi-Cube installation. A single-stacked Cube installation rated at 10MW/40MWh requires approximately 25,000 square feet.
Eos Cube with Znyth 2.3 battery technology specifications
Nominal System Power (DC)

150 kW

Maximum Power During Discharge

120 kW

Maximum Power During Charge

150 kW

Maximum Delivered Energy

460 kWh

SOC Operating Range


Average Discharge Voltage

768 VDC

Nominal Charge Voltage

912 VDC

Minimum Operating Voltage

576 VDC

Maximum Operating Voltage

1000 VDC

Maximum Charge Current

150 ADC

Maximum Discharge Current

225 ADC

Response Time2

<5 ms

Storage State of Charge


Storage / Initial Start Voltage


Self-Discharge Power (average)

1% / hr @ 100% SOC


Modbus TCP/IP

SOC Accuracy3


Estimated Footprint4

20(L) x 8 (D) x 9.5 (H) ft
6.1(L) x 2.4(D) x 2.9(H) m

Estimated Weight

46,000 Lbs
20,865 kg

Operating Ambient Temperature Range5

10 to 45 °C
50 to 113 °F

Max. Operating Ambient Temperature Range6

-20 to 50 °C
-4 to 131 °F

Storage Temperature

-20 to 50 °C
-4 to 158 °F

Energy Block Enclosure Rating

NEMA 3R | IP54

Thermal Management

Forced Ambient Air

Seismic Rating7

Zone 3

  1. RTE depends on temperature, depth of discharge, use case, as well as upsizing relative to capacity performance guarantee
  2. Does not account for response lag due to AC hardware or communications; power may be derated due to String contactors being open as a normal part of top-of-charge SoC management Confidential & Proprietary
  3. Subject to battery cycling profile
  4. Double stack configuration is available to reduce footprint
  5. Operating outside this range may impact performance but permanent capacity loss is not realized
  6. Hot or low temperature weather packages available as options
  7. Zone 4 option available

We’re charged to implement with ease and speed.

Eos Project Teams support customers from conceptual design through full turnkey system delivery. Our Project Managers and Engineers have broad project delivery experience and the hands-on knowledge to address the challenges capital projects face in meeting safety, quality, schedule, and cost expectations.

What’s your energy storage challenge?

Tell us a little more about your project, and we’ll connect you with the right Eos team member.

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