AES' Seguro storage project is a proposed battery energy storage project in North San Diego County, California, near Escondido, and San Marcos, that will provide a critical, cost-effective source of reliable power to support the region’s electric grid.
By delivering stored power when it is most needed, the Seguro storage project provides flexibility that will be critical to helping the San Diego region meet its decarbonization goals and California achieve 100% carbon-free energy by 2045.
Project overview
Up to 320 MW 1,280 MWh capacity*
Enough stored energy to power approximately 240,000 California homes for four hours
Supports electric grid reliability by providing a flexible energy resource
*The proposed original size for the Seguro BESS was 400 MW / 1600 MWh. The size has been reduced due to stakeholder and community feedback and project design requirements.
Project details
Seguro energy storage
- Containerized lithium-ion battery energy storage system (BESS)
- 22.5 acres of privately held land site location
- Features metal storage containers that will house racks of battery modules equipped with insulation and robust safety monitoring and management systems
- Feeds into the nearby existing San Diego Gas & Electric (SDG&E) Escondido Substation
- AES will be the long-term owner and operator of the facility
Project timeline
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Environmental & economic benefits
Utilizes land near existing electric grid infrastructure to minimize need for new overhead transmission lines
Designed in accordance with the latest applicable codes, safety standards, security, lighting, landscaping and noise requirements
Expected economic benefits include:
- More than $11 million in local tax revenue and more than 450 direct jobs during construction, while supporting indirect employment and businesses in the area
- Almost $6 million in local tax revenue annually during operations, including $3.6 million that will benefit local schools
Environmental and technical studies
The project will be reviewed under the California Environmental Quality Act (CEQA). Environmental and technical studies for the project will include a Phase I Environmental Site Assessment, hydrology, geotechnical, cultural resources, land, topography, biological, wetlands, economic impact and other studies. AES will work with the relevant government and regulatory agencies to mitigate potential environmental impacts from the project.
Community engagement
AES is committed to being a good neighbor and partner to the communities where our projects are located. This includes informing and engaging project stakeholders and the public throughout all phases of the project. AES also supports local contractors, community organizations and programs. AES is proud to partner with Palomar College, Escondido Education Foundation, San Diego Children’s Discovery Museum, Solana Center, and Solutions for Change.
If you are interested in receiving updates about AES’ Seguro storage project, please fill out and submit this form.