AES to install largest battery-based energy storage project in US for SDG&E

LinkedIn
Twitter
Reddit
Facebook
Email

AES will deploy its Advancion 4 storage systems at two SDG&E substations in San Diego County, California, with 30MW in Escondido and 7.5MW in El Cajon. Credit: AES
US-based storage provider AES Energy Storage, a subsidiary of AES Corporation, has signed contracts with utility San Diego Gas and Electric (SDG&E) to install two energy storage arrays with a combined capacity of 37.5MW.

AES will deploy its Advancion 4 storage systems at two SDG&E substations in San Diego County, California, with 30MW in Escondido and 7.5MW in El Cajon. They will help the utility improve regional reliability and integrate more renewable energy. The Advancion arrays will be able to provide 37.5 MW of power for four continuous hours and serve as a 75 MW of flexible resource to the grid.

The systems will include batteries by Samsung SDI and power conversion systems by Parker Hannifin.

The projects will become operational by the end of January 2017 and the Escondido array will be the largest battery-based energy storage project in operation in the US, according to AES.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

The utility is trying to accelerate its uptake of energy storage with support from the California Public Utilities Commission (CPUC).

Andrés Gluski, AES president and chief executive, said: “We are excited that SDG&E has selected AES’ Advancion energy storage solution to help meet peak demand and ensure the reliability of the electric grid in Southern California. AES recently made Advancion available to utilities, developers and commercial customers interested in owning our innovative and scalable solution.”

James Avery, SDG&E’s chief development officer, said: “These batteries are beneficial because they maintain a reliable flow of energy to customers when they need it most. We also are national leaders in supplying renewable resources, with more than 33% of the energy we supply to customers coming from wind and solar. These batteries will help smoothly integrate this growing supply of clean energy onto the power grid for use by our customers.”

AES Energy Storage recently made significant expansions away from established markets into relatively untapped regions across the globe.

Read Next

September 16, 2026
Interconnection costs for utility-scale energy storage in California are significantly lower than in other major US markets, with developers also benefiting from network upgrade cost reimbursements unavailable elsewhere, according to a senior executive at Rev Renewables.
September 16, 2026
Recent moves from the US federal government could prove more damaging to US renewable energy deployment than foreign entity of concern (FEOC) compliance requirements, according to legal and industry experts.
September 16, 2026
Dubai is planning to build 1,000MW of lithium-ion battery storage, expandable to 2,000MW and delivering 6,000MWh of capacity, according to panellists speaking on the “Key Trends from Early Middle East BESS Projects” panel at Energy Storage Summit Middle East 2026.
September 14, 2026
Heron Power and NeoVolta have secured significant credit facilities, while Carina Energy has launched a FEOC compliance support practice to help developers navigate increasingly complex regulatory requirements.
September 8, 2026
EPC Renewables has signed an MoU with state-linked utility Energy Fiji Limited for the development of the Yaqara Solar & Battery Project.