The Kings County Zinc Air Battery Energy Storage System is a 10,000kW energy storage project located in Kings County, California, US. The rated storage capacity of the project is 40,000kWh.

The electro-chemical battery energy storage project uses others as its storage technology. The project was announced in 2015 and will be commissioned in 2021.


The Kings County Zinc Air Battery Energy Storage System is being developed by Convergent Energy and Power. The project is owned by Pacific Gas and Electric (100%), a subsidiary of PG&E.

The key applications of the project are distribution upgrade due to solar, electric energy time shift, ramping, renewables capacity firming and renewables energy time shift.

Contractors involved

Pacific Gas and Electric is the owner. Convergent Energy and Power is the developer. Eos Energy Enterprises is the technology provider for the project.

Additional information

Convergent was awarded a 10 MW, 40 MWh energy storage contract by Pacific Gas and Electric Company via their 2014 Energy Storage Request for Offers solicitation. The system will provide up to four continuous hours of dispatchable capacity to meet PG&E’s Resource Adequacy (RA) / system capacity requirements.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.