Convergent to supply energy storage system to Pacific Gas and Electric

Convergent Energy + Power on Dec. 3 announced a 10-MW, 40-MW-hour project award from Pacific Gas and Electric for a project that was selected as part of the first round of PG&E’s highly competitive Energy Storage Request For Offers solicitation.

PG&E announced Dec. 2 several winners from this solicitation, including this project.

“Energy storage can provide location-targeted capacity that relieves grid constraints and meets reliability standards, while also increasing grid flexibility and resiliency,” said Johannes Rittershausen, Convergent’s CEO. “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 the 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 (Znyth) battery technology, provided by Eos Energy Storage.

“Eos is proud to support Convergent’s mission of improving grid reliability and resiliency,” said Eos CEO Michael Oster. “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 Consolidated 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.

“This is just the beginning of a rapidly expanding energy storage industry,” said Rittershausen. “Utilities – as well as end-users of electricity – can take advantage of a variety of reliable, responsive and environmentally friendly energy storage solutions to overcome expensive grid infrastructure challenges. PG&E’s project award further demonstrates Convergent’s reputation and capabilities as a leading developer of energy storage assets.”

The seven projects selected by PG&E and announced Dec. 2 include four Lithium Ion Battery projects, two Zinc/Air Battery storage facilities and one Flywheel project (a first for PG&E). Flywheel technology uses kinetic energy to store energy and later supply that energy to the grid. These first projects are due to come online in May 2017. The project backers, project names, technology and size are:

  • Amber Kinetics, Energy Nuevo, Flywheel, 20 MW;
  • Hecate Energy, Molino, Lithium Ion Batteries, 10 MW;
  • NextEra Energy, Golden Hills, Lithium Ion Batteries, 30 MW;
  • Convergent, Henrietta, Zinc/Air Batteries, 10 MW;
  • Western Grid, Clarksville, Zinc/Air Batteries, 3 MW;
  • Hecate Energy, Old Kearney, Lithium Ion Batteries, 1 MW; and
  • Hecate Energy, Mendocino, Lithium Ion Batteries, 1 MW.

Pacific Gas and Electric, a subsidiary of PG&E Corp. (NYSE: PCG), is one of the largest combined natural gas and electric utilities in the United States.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.