ESS Inc.

Energy Warehouse

ShippingIron FlowUnited StatesPassive Cooled

Key Differentiator

Zero degradation — electrolyte lasts 25+ years; no fire risk; no rare materials; ideal for long-duration

Energy

0.4MWh

Power

0.075MW

RTE

70%

Cycle Life

20,000

Warranty

25yr

Weight

18t

Energy Capacity
0.4MWh
Power Output
0.075MW
Duration Options
6h / 12h
Round-Trip Efficiency
70%
Cycle Life
20,000cycles
Depth of Discharge
100%
Chemistry
Iron Flow

Notes

Iron flow battery — fundamentally different tech. No fire risk, no rare materials, no degradation. Lower RTE (70%) but 25-year life with zero augmentation. 40ft container.

Data Confidence

Medium — from public specs and filings

Last verified: 2025

Pricing & Trends

$/kWh tracking and historical trends

Coming soon

Documents

Datasheets, installation manuals, warranty terms

Coming soon

Industry Reviews

References and evaluations from industry sources

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