Dark Sky Energy Center

Dark Sky Energy Center — 7 MW battery storage, CA · Ask the Grid

Generation and physical site

EIA plant 66599 · Inventory reporting month unavailable.

Reported operating nameplate by technology

Battery storage: 7.3 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (1)

EIA generator status and nameplate capacity for selected plant
Generator	Technology	Status	Power (MW)	Energy (MWh)
1	Batteries	Operating	7.3	Unknown

Sources and observation dates

Inventory source: EIA generator registry
EIA reporting month: Not reported
EIA retrieved: Not reported
OSM extract: Not reported
OSM last mapped edit: Not reported
Map prepared: Not reported
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
1	7.3 MW 7.1 MW summer	Batteries Electricity used for energy storage · BA	Jul 2025	Operating

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operatorMarket / regulatorRelated asset

Parties and identifiers

OrganizationRoleBasis

San Diego Gas & Electric CompanyOwner / operatorOwner and operator

SempraParent companyParent company of SDG&E

Reporting portfolio

EIA reporting entity

San Diego Gas & Electric Co

Entity 16609

Operating portfolio

17 plants

1 states

Reported capacity

902.8 MW

Batteries · Natural Gas Fired Combined Cycle · Natural Gas Fired Combustion Turbine

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Palomar Energy	559 MW	CA
Miramar Energy Facility	106 MW	CA
Cuyamaca Peak Energy Plant	48.7 MW	CA
Fallbrook Energy Storage	40 MW	CA
Top Gun Energy Storage	30 MW	CA
Melrose BESS	20 MW	CA

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

2019
2019
CPUC D.19-09-051 approves Advanced Energy Storage projectdocs.cpuc.c...
CPUC Decision D.19-09-051 approved SDG&E's Advanced Energy Storage project at the Borrego Springs microgrid.
2020
2020
Project Commencementdocs.cpuc.c...
SDG&E commenced the Advanced Energy Storage project. (Note: an earlier workpaper states 2021 commencement; the 2026 completed-project report retrospectively records 2020.)
2022
2022
Additional funding requested in TY 2024 GRCdocs.cpuc.c...
SDG&E requested additional funding for the Advanced Energy Storage project in its Test Year 2024 General Rate Case.
View 2 more milestonesHide 2 milestones
1. Nov 1, 2023
  Nov 1, 2023
  FERC EIA active datembrweb.ferc...
  The FERC EIA index lists this date as the plant's active date in its registry. SDG&E separately reports a later CAISO commercial operation date.
2. Feb 20, 2024
Jul 2025
Jul 2025
Generator enters operationEIA-860
EIA-860 lists generator 1 with this operating date.
Nov 2025
Nov 2025
First dual-asset microgrid operationdocs.cpuc.c...
SDG&E reports that the Advanced Energy Storage project was first operated as a dual-asset microgrid for reliability and resiliency purposes.
Feb 2026
Feb 2026
Project completion for reportingdocs.cpuc.c...
SDG&E completed the necessary energy data validation and deemed the Advanced Energy Storage project complete for the purposes of the cost-benefit reporting requirement.

Sources

PublisherReferenceType

U.S. Energy Information AdministrationEIA-860 generator inventoryFederal registry

docs.cpuc.ca.govdocs.cpuc.ca.govauthoritative

mbrweb.ferc.govmbrweb.ferc.govauthoritative

Common questions about Dark Sky Energy Center

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.

How big is Dark Sky Energy Center?

Dark Sky Energy Center reports 7.3 MW battery storage of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Form 860M.

What kind of plant is Dark Sky Energy Center?

Dark Sky Energy Center is a batteries facility in San Diego County, CA, participating in the CAISO market.

Where is Dark Sky Energy Center located?

Dark Sky Energy Center is in San Diego County, CA, inside the CAISO balancing area.

Who operates Dark Sky Energy Center?

Dark Sky Energy Center is operated by San Diego Gas & Electric Co according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How does Dark Sky Energy Center compare to other plants?

By capacity, Dark Sky Energy Center ranks #656 of 1,061 operating plants of the same technology nationally. It ranks #175 of 272 in CA.

Co-located assets

Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.

Desert Green Solar Farm LLCSolar PhotovoltaicSolar Photovoltaic6 MW102 m Borrego Springs Energy StorageBatteriesBatteries · same type2 MW246 m Solar Borrego ISolar PhotovoltaicSolar Photovoltaic26 MW3.2 km

Overview

Structured profile

Dark Sky Energy Center

Overview

Structured profile

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