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ENERGY STORAGE FOR CRITICAL PROJECTS

CLEANEST, LONG-DURATION STORAGE WITH NO CAPACITY DEGRADATION AT THE LOWEST COST FOR COMMERCIAL AND UTILITY SCALE PROJECTS

UNLIMITED CYCLING WITH NO DEGRADATION  

The Iron Flow Battery we provide is capable of multiple cycles per day, allowing customers to participate in the market unconstrained to the standard “once-per-day” cycle-limit regimes imposed by other technologies. There is no performance degradation or augmentation required over our technology’s 25-year useful life. 

ENERGY STORAGE FOR CRITICAL PROJECT

Utilizing earth-abundant iron, salt and water for its electrolyte, and simple materials for battery components, the Energy Warehouse TM (EW) from ESS Inc. is a durable, environmentally safe, long-duration storage solutionthat is ideally suited for

·      Time-shifting renewable energy on a daily basis. 

·      Managing a facility’s demand or TOU charges.

·      Smoothing the intermittency of renewables on a constrained grid.

·      Increasing resiliency and fuel efficiency for remote locations. 

The Iron Flow Batteries have a lifespan that exceeds 20,000 cycles, low maintenance requirements, and an energy capacity of 4+ hours. It is complementary to the 25-year lifespan of our solar and supports those applications’ low levelized cost of energy requirements. 

Concurrent with serving these applications, the EW’s inherent quick-response power electronics can perform ancillary services such as voltage and frequency support on microgrids and utility-scale applications. 

INSTANTANEOUS, LONG DURATION PERFORMANCE

The Iron Flow Battery has a less than one millisecond DC bus response time, making it highly suitable for bulk energy shifting and ancillary services. It can go from charge to discharge instantaneously, with no risk of performance degradation. The graph to the below depicts the system power to state-of-charge of the Iron Flow Battery through the charge/discharge process. 

HAZARD-FREE ENERGY STORAGE  

The Iron Flow Battery is comprised of earth-abundant iron, salt and water. The system’s environmentally benign characteristics, containing NO HAZARDOUS CHEMICALS or rare-earth metal, make it the easiest-to-permit storage technology in the world. The Iron Flow Battery has no fire, chemical or explosive risk, eliminating the need for fire-suppression, secondary containment, and hazmat requirements. In addition, the system is fully recyclable at end-of-life. 

LOWEST COST OF OWNERSHIP

The Iron Flow Battery provides the lowest overall cost for applications that require 4+ hours of energy storage due to its 25-year useful life, no degradation, no system augmentation, and hazard-free composition. Due to the technology’s ability to store energy for over 8 hours, it is ideal for renewable generation firming, demand- side Iron Flow Battery management, peak hour replacement, microgrids, and grid enhancement applications. 

TECHNOLOGY 

The all-iron redox (reduction-oxidation) flow battery technology is based on the simplicity of the electrochemical ferrous/iron plating reaction on the negative side and the ferrous/ferric redox reaction on the battery’s positive side. 

The EW is a flexible long-duration energy storage system that safely and effectively addresses the broadest range of energy and power applications at a lower Levelized Cost of Storage (LCOS) than other technologies on the market.