ENERGY STORAGE FOR CRITICAL PROJECTS
Utilizing earth-abundant iron, salt and water for its electrolyte, and simple materials for battery
components, the Energy Warehouse™ (EW) from ESS Inc. is a safe (no hazardous materials)
and sustainable (fully recyclable) iron flow battery storage solution that 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 EW has an energy storage capacity of 400 kWh, a 25-year design life, and can be configured
with variable power to provide storage durations of 4 to 12 hours. These features make it ideal for
traditional renewable energy and utility projects where long-life and unlimited cycling capability
are desired. Concurrent with serving these applications, the EW’s inherent quick-response power
electronics can perform ancillary grid services such as voltage and frequency support on microgrids.
UNLIMITED CYCLING TECHNOLOGY
ESS Inc.’s 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 firm’s patented electrode design and control system allow the battery to operate at high
efficiency over literally an unlimited number of deep charge and discharge cycles, with no
degradation or capacity fade. Our products are designed for a 25-year operating life with
minimal annual operations & maintenance (O&M) requirements.