The Cochrane Thermal Power – Lithium Ion Battery Energy Storage System is a 20,000kW energy storage project located in Mejillones, Antofagasta, Chile.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was announced in 2012 and was commissioned in 2016.


The Cochrane Thermal Power – Lithium Ion Battery Energy Storage System was developed by AES Energy Storage and AES Gener. The project is owned by Mitsubishi (40%) and AES Gener (60%), a subsidiary of The AES .

The key applications of the project are electric supply capacity and electric energy time shift.

Contractors involved

AES Energy Storage, AES Gener, GS Yuasa , Lithium Energy Japan and Mitsubishi have delivered the battery energy storage project.

Additional information

The Cochrane thermo project calls for the construction and operation of a coal-fired thermoelectric plant in the bay of Mejillones. Developed by Empresa Eléctrica Cochrane, a 60-40 JV between INVERSIONES NUEVA VENTANAS (subsidiary of AES Gener), and Diamond Pacific Investment (subsidiary of Mitsubishi Corp), the plant will feature two generation units, a substation and a 153km transmission line (220kV) that will inject power to the country’s northern Sing grid. The energy generated will be sold at a fixed price to mining companies including SQM and Sierra Gorda.

About AES Energy Storage

AES Energy Storage LLC (AES Energy), a subsidiary of The AES Corp, is an energy service provider that offers commercial energy storage solutions. The company provides operation and maintenance, and planning and deployment services. Its planning and deployment services include facilities design and engineering, site development and preparation, geotechnical evaluation and permitting, interconnection engineering, bidding management, procurement and construction, critical system commissioning, facility commissioning, and project planning. AES Energy owns and operates power plants in the US. The company caters its services to the utilities, power markets, independent power producers, and renewable developers. AES Energy is headquartered in Arlington, Virginia, the US.

About AES Gener

AES Gener SA (AES Gener), a subsidiary of The AES Corp, is an integrated electric utility. It produces, markets, exports and imports electric power. The company generates electricity using coal, gas, diesel, hydro, biomass and solar sources. AES Gener provides electricity in four independent markets: SIC and SING in Chile; SIN in Colombia; and SADI in Argentina. It owns energy storage and water desalination assets; and has interests in various water and power projects under construction phases. AES Gener operates a portfolio of generation assets in Chile, Colombia and Argentina. The company is owned by AES Corp, Chilean Pension Funds and other shareholders. AES Gener is headquartered in Santiago, Chile.


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.