PSE&G installs, commissions 1MWh battery system for microgrid project in New Jersey

By Conor Ryan
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Eos Energy Storage grid-scale system. This and cover image: Eos Energy Storage.

Eos Energy Storage has installed and commissioned a 1MWh Eos Aurora battery system at a wastewater treatment plant in Caldwell, New Jersey.

This system will serve as a main component of utility Public Service Electric and Gas Company's (PSE&G) on-site energy storage microgrid that will help keep the facility operational during extended power outages.

The microgrid system includes an Eos Energy Storage system, along with an 896kW solar PV system designed and installed by Advanced Solar Products. Siemens Energy Management integrated the Eos Aurora system, solar facility, and existing diesel generator — utilising Eos Znyth technology as the base of the microgrid. Znyth use zinc hybrid cathodes, which Eos claims makes its batteries 30% to 40% lower cost than comparable lithium-ion systems.

The company is shipping its systems this year for US$160 per kWh and once it scales up into larger utility-scale systems, Eos says it could give solar-plus-storage projects an LCOE of below 10 cents per kWh. Utility Engie is testing Eos Znyth batteries, stacked into Eos' 'Aurora' branded grid-scale systems, in Brazil, while Eos also has an agreement to collaborate with engineering giant Siemens on developing energy storage systems with AC power conversion and controls.

The Caldwell wastewater treatment plant microgrid stands as part of a 3MW portion of PSE&G's Solar 4 All program — a plan that looks to develop projects that mesh solar with other technologies to strengthen the electricity grid.

Todd Hranicka, director of solar energy at PSE&G, said: “One of the goals of our Solar 4 All program is to help support the growth and development of solar and related industries in New Jersey. So we were especially happy to include the battery technology from a fellow New Jersey company like Eos into a project that helps make our electric system and a piece of critical infrastructure more reliable and resilient.”

Construction of the storage system was a joint undertaking between Advanced Solar Products, Eos, and Siemens Energy Management.

Michael Oster, CEO at Eos, said: “The Caldwell project is truly a landmark for us. It shows that municipalities and utilities are embracing large-scale, long-duration energy storage in a manner that will greatly enhance public safety and grid resiliency. We are proud to partner with these industry leaders and look forward to setting new standards for energy reliability and cost effectiveness.”

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