# Escondido Energy Storage

CAISO asset profile · https://askthegrid.com/assets/facilities/escondido-energy-storage

## Current generation inventory

EIA plant 60570 · Inventory reporting month: 2026-08.

- Capacity basis: operating_generator_nameplate_mw
- Source inventory: [EIA-860M workbook (preliminary)](https://www.eia.gov/electricity/data/eia860m/xls/august_generator2026.xlsx)
- Inventory retrieved: 2026-10-10T22:49:53.020309+00:00
- Filed coordinate (longitude, latitude): -117.1143, 33.124446
- OSM extract: 2026-10-09T20:21:04Z
- OSM mapped edit: 2025-07-18 03:10:38+00:00
- Map prepared: 2026-10-10T23:05:22.012415+00:00

Battery power (MW) and stored energy (MWh) are separate measures. Shared physical-site membership does not establish electrical connectivity, settlement or a common export limit.

## Reviewed overview

Escondido Energy Storage is SDG&E’s lithium-ion battery facility in Escondido, San Diego County, with 30 MW / 120 MWh of installed nameplate capacity. The August 2026 EIA inventory lists generator SES as out of service but expected to return in the next calendar year (status OA). Its installed rating therefore does not establish currently available output. SDG&E developed the facility to support reliability after the Aliso Canyon gas-storage disruption. The utility reported a fire in one battery container on September 5, 2024; that incident history is separate from the dated EIA inventory status.

## Reviewed metrics

- **Nameplate capacity:** 30 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 60570 — plant-60570

## Facts

- **Technology:** Batteries
- **Operator:** San Diego Gas & Electric Company
- **Operating status:** Out of service (EIA OA; August2026)

## Related parties

- **Owner / operator:** San Diego Gas & Electric Company — Owner and operator ([source](http://sdge.com/))
- **EPC contractor / O&M provider:** AES Energy Storage LLC — Turnkey EPC contractor and long-term service provider
- **Balancing authority / market operator:** California Independent System Operator (CAISO) — Wholesale market operator and balancing authority
- **Regulator:** California Public Utilities Commission (CPUC) — State utility regulator

## Sources

- [docs.cpuc.ca.gov](https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M166/K269/166269958.PDF) — docs.cpuc.ca.gov · authoritative — Source retained for exact-record publication review.
- [docs.cpuc.ca.gov](https://docs.cpuc.ca.gov/PublishedDocs/SupDoc/A2506002/9081/603483148.pdf) — docs.cpuc.ca.gov · authoritative — Source retained for exact-record publication review.
- [energyincidentregister.com](https://energyincidentregister.com/facility/escondido-energy-storage-ca-us-60570-battery/) — energyincidentregister.com · public_source — Source retained for exact-record publication review.
- [investors.parker.com](https://investors.parker.com/news-events/press-releases/detail/162/parker-deploys-37-5-megawatts-of-power-conversion-systems) — investors.parker.com · public_source — Source retained for exact-record publication review.
- [mbrweb.ferc.gov](https://mbrweb.ferc.gov/SearchMBRAssetAppendix/AssetAppendixDetails?AssetAppendixId=13677) — mbrweb.ferc.gov · authoritative — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/escondido-energy-storage
Website: [San Diego Gas & Electric Company](http://sdge.com/)

Source: Ask the Grid — https://askthegrid.com/