Clairemont Energy Storage
San Diego Gas & Electric CompanySan Diego County
Clairemont Energy Storage is SDG&E’s battery microgrid beside Clairemont Substation in San Diego. The utility’s August 2024 financing report describes 9 MW / 29 MWh, while the August 2026 EIA inventory records 10 MW / 10 MWh and an operating start in March 2024. These are distinct reported capacity figures. The microgrid was designed to support local critical facilities during grid outages and participate in CAISO under normal conditions.
Mapped infrastructure geometry associated with this asset.
EIA plant 66266 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 1 | Batteries | Operating | 10 | 10 |
SDG&E’s August 2024 report gives 9 MW / 29 MWh. The August 2026 EIA inventory lists 10 MW / 10 MWh. These source records describe the same facility with different reported values; the utility project rating and EIA inventory are shown separately.
Source: SDG&E August 2024 Sustainable Financing Report · as of 2024-08-09
The August 2026 EIA operating inventory gives March 2024. SDG&E’s August 2024 financing report also says Clairemont was completed in March 2024. The July 31, 2023 date in the 2022 CPUC resolution was an estimated commercial-operation target.
Source: EIA August 2026 operating generator inventory · as of 2026-08
The CPUC’s approved project description identifies Balboa Branch Library, Fire Station 36 and nearby schools among the facilities intended to receive resiliency support from Clairemont circuit 278.
Source: CPUC Resolution E-5219 · as of 2022-06-23
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 10 MW 10 MW summer | Batteries Electricity used for energy storage · BA | Mar 2024 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
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Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
SDG&E's 2018 energy-storage procurement plan (Application A.18-02-016) included a proposed Clairemont project rated at 10 MW / 10 MWh, with an expected commercial date of December 31, 2020.
EIA-923 reports gross generation and net grid exchange for storage plants. Gross generation is shown as a discharge proxy; it is not a cycle count or conventional capacity factor.
| 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 | |
| Elliott Energy Storage | 10 MW | CA | |
| Boulevard Energy Storage | 10 MW | CA |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioCPUC Decision 21-12-004 authorized SDG&E to develop up to four circuit-level storage microgrids, each initially described as 10 MW with four-hour duration, and required CAM cost recovery.
The official August 2026 EIA operating inventory records plant 66266 with one operating 10 MW / 10 MWh battery and an operating start in March 2024.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
SDG&E’s August 2024 report gives 9 MW / 29 MWh. The August 2026 EIA inventory lists 10 MW / 10 MWh. These source records describe the same facility with different reported values; the utility project rating and EIA inventory are shown separately.
The August 2026 EIA operating inventory gives March 2024. SDG&E’s August 2024 financing report also says Clairemont was completed in March 2024. The July 31, 2023 date in the 2022 CPUC resolution was an estimated commercial-operation target.
The CPUC’s approved project description identifies Balboa Branch Library, Fire Station 36 and nearby schools among the facilities intended to receive resiliency support from Clairemont circuit 278.
Clairemont Energy Storage reports 10 MW battery storage of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
Clairemont Energy Storage is a batteries facility in San Diego County, CA, participating in the CAISO market.
Clairemont Energy Storage is in San Diego County, CA, inside the CAISO balancing area.
Clairemont Energy Storage is operated by San Diego Gas & Electric Co according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Clairemont Energy Storage reports a commercial operation date of 2024-03. Current status: operating. Source: EIA Aug 2026.
Clairemont Energy Storage reported 5.5 GWh over the twelve months to 2024-12. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.
By capacity, Clairemont Energy Storage ranks #488 of 1,061 operating plants of the same technology nationally. It ranks #154 of 272 in CA.
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.