Energy Storage Systems (ESS, Inc.) brings deep experience in fuel cells, electrochemistry, advanced material science, and renewable energy. The breakthrough 50 kW/400 kWh Iron Flow Battery (IFB) integrates proprietary and patented all-iron electrolyte with low cost and non-toxic materials that enables us to offer one of the lowest installed cost/kWh storage systems in the market.

ESS Inc. envisions future limitations of Li-ion in the next frontier of flexible, long-duration storage and sees flow batteries, and especially the all-iron flow battery with its fast response time and limitless cycling, as being capable of making a future of energy storage capabilities a reality today.

Energy Storage Systems

   Rugged & TurnKey

Energy Storage Systems

Military – Application

ESS Inc. is poised to lead project developers, utility representatives, and EPC’s in the transition to a more flexible, longer-duration energy storage asset that can be used in many different use cases and for many different durations of time from 2-8 hours when responding to increased penetration of renewables. The IFB provides the flexibility to install a storage asset today that will be able to react to the emerging applications and use cases of the future.


ESS has cracked the code to keeping traditional iron chemistry stable for thousands of deep charge and discharge cycles with no degradation; users can expect over 20,000 cycles at over 80% depth of discharge during a 25-year life, with minimal maintenance.

Energy Storage Systems

IFB – Energy Storage

Energy Storage Systems

Commercial & Residential

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