# Cuyamaca Peak Energy Plant

CAISO asset profile · https://askthegrid.com/assets/facilities/cuyamaca-peak-energy-plant

## Current generation inventory

EIA plant 55512 · Inventory reporting month: 2026-08.

- natural gas: 48.7 MW operating nameplate
- 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): -116.9721, 32.796491
- OSM extract: 2026-10-09T20:21:04Z
- OSM mapped edit: 2022-06-27 00:17:38+00:00
- Map prepared: 2026-10-10T23:05:26.870233+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

Cuyamaca Peak Energy Plant is SDG&E’s gas-fired peaking facility in El Cajon, San Diego County. EIA reports 48.7 MW of nameplate capacity. Its FT8 SWIFTPAC configuration uses two combustion turbines driving one shared generator. The plant entered service in May 2002, and ownership transferred from CalPeak Power to SDG&E in January 2012.

## Profile

- **SDG&E role:** Utility owner and operator, rather than only a power purchaser or transmission neighbor.

## Reviewed metrics

- **Nameplate capacity:** 48.7 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 55512 — plant-55512

## Facts

- **Technology:** Natural Gas Fired Combustion Turbine
- **Operator:** San Diego Gas & Electric Company
- **Operating status:** Operating

## Related parties

- **Owner / operator:** San Diego Gas & Electric Company — utility owner and operator ([source](https://www.sdge.com/))
- **Parent company:** Sempra — parent company ([source](https://www.sempra.com/))
- **Former owner / seller:** CalPeak Power-El Cajon LLC — former owner and seller
- **Historical power purchaser:** California Department of Water Resources — Historical DWR purchase arrangements before SDG&E ownership. ([source](https://water.ca.gov/))
- **Equipment supplier:** Pratt & Whitney — turbine generator manufacturer ([source](https://www.prattwhitney.com/))
- **Regulator:** San Diego County Air Pollution Control District — air-quality regulator ([source](https://www.sdapcd.org/))

## Sources

- [api.eia.gov](https://api.eia.gov/v2/electricity/operating-generator-capacity/data/?api_key=DEMO_KEY&frequency=monthly&data[0]=nameplate-capacity-mw&data[1]=net-summer-capacity-mw&facets[plantid][]=55512&start=2026-07&end=2026-07) — api.eia.gov · authoritative — Source retained for exact-record publication review.
- [docs.cpuc.ca.gov](https://docs.cpuc.ca.gov/PublishedDocs/EFILE/A/129199.PDF) — docs.cpuc.ca.gov · authoritative — Source retained for exact-record publication review.
- [docs.cpuc.ca.gov](https://docs.cpuc.ca.gov/PublishedDocs/PUBLISHED/GRAPHICS/154977.PDF) — docs.cpuc.ca.gov · authoritative — Source retained for exact-record publication review.
- [caiso.com](https://www.caiso.com/documents/curtailed-non-operational-generator-am-report-20180321.html) — caiso.com · public_source — Source retained for exact-record publication review.
- [floridapsc.com](https://www.floridapsc.com/library/filings/2014/04922-2014/Support/Exhibit%20-%20120/5a2.Change%20in%20Control%20SDGE.pdf) — floridapsc.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/cuyamaca-peak-energy-plant
Website: [San Diego Gas & Electric Company](https://www.sdge.com/)

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