Convergent Energy to build $160/kWh battery storage project for PG&E

Written By: Stratton Report
December 3, 2015


On December 3, Convergent Energy + Power, a energy storage asset developer, announced a 10 MW, 40 MW-hour project award from Pacific Gas and Electric Company. This project was selected as part of the first round of PG&E’s highly competitive Energy Storage Request For Offers solicitation.

Johannes Rittershausen, Convergent’s CEO commented: “Energy storage can provide location-targeted capacity that relieves grid constraints and meets reliability standards, while also increasing grid flexibility and resiliency. Convergent appreciates the opportunity to work with the PG&E team to bring the benefits of commercial energy storage to California’s electric grid.”

As a technology-neutral developer, Convergent offers a wide array of technology options, with currently announced projects including a 3 MWh, 6-hour continuous discharge battery used for transmission and distribution deferral in Central Maine Power service territory as well as a 5 MW, 6-minute flywheel and 7 MW, 1-hour battery used for frequency regulation and voltage support services by the Ontario Independent System Operator.

PG&E selected a Convergent proposal with four hours of continuous discharge capability for peak shaving and grid balancing services. The utility-scale energy storage system will employ a low-cost, long-life zinc-hybrid cathode (ZnythTM) battery technology, provided by Eos Energy Storage.

Eos CEO Michael Oster remarked:

“Eos is proud to support Convergent’s mission of improving grid reliability and resiliency. At a price of $160/kWh, our Aurora DC battery system enables locational capacity that is cost competitive with incumbent solutions – such as gas peaking plants and copper wire – and moreover distributed within the grid’s most congested locations.”

Eos has deployed systems with major utility partners including Con Edison of New York and Engie (formerly GDF Suez). The company recently announced a California Energy Commission funded project to deploy an Aurora system at PG&E’s San Ramon Technology Center. Eos is ramping up volume production with major contract manufacturing partners and is delivering numerous MW-scale systems in 2016.