Santee BESS
San Diego Gas & Electric CompanySan Diego County
Overview
- Project power / energy
- 10 MW / 40 MWh
- 4-hour project design reported by the utility or supplier; power is MW and stored energy is MWh.
- Registry anchor
- Plant 67118
- plant-67118
Profile
- SDG&E role
- Utility owner and operator, rather than only a power purchaser or transmission neighbor.
Structured profile
- Technology
- Batteries
- Operator
- San Diego Gas & Electric Company
- Operating status
- Operating
Generation and physical site
EIA plant 67118 · Inventory reporting month unavailable.
Reported operating nameplate by technology
- Battery storage
- 10 MW
Generator records (1)
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 1 | Batteries | Operating | 10 | Unknown |
Sources and observation dates
Questions answered by the public record
How much storage does Santee BESS provide?
SDG&E’s project fact sheet specifies 10 MW / 40 MWh, a four-hour system using lithium iron phosphate batteries in twelve twenty-foot containers. It is located on SDG&E-owned property beside Santee Substation.
When did Santee BESS become operational?
EIA’s August 2026 preliminary generator inventory records January 2026 as the operating month. Earlier July 2024 and Q1 2025 dates were project targets or estimates, rather than the current EIA-reported operating month.
Source: www.eia.gov exact-project record · as of 2026-08
Related assets
Similar plants ranked by technology, capacity, and distance.
Units and generators
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 | Jan 2026 | Operating |
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Market registration
CAISO resource registryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Transactions and agreements
Regulatory Filing
Sep 29, 2023
SDG&E submitted Advice Letter 4290-E requesting approval of two EPC contracts with Stella Energy Solutions for 39.6 MW total of utility-owned energy storage, including the 10 MW Santee project.
San Diego Gas & Electric Company · Stella Energy Solutions
Construction Start
Jan 2024
SDG&E fact sheet listed January 2024 as the project construction start date.
San Diego Gas & Electric Company
Scheduled Commercial Operation
Jul 17, 2024
The CPUC-approved contractual commercial-operation date for the Santee BESS project. Later construction updates and workpaper forecasts indicate this target was not met.
San Diego Gas & Electric Company · Stella Energy Solutions
Construction Update
Jul 30, 2024
SDG&E issued a second construction notification letter describing ongoing crew mobilization and primary construction and installation work. Anticipated schedule was ongoing through approximately Q1 2025.
San Diego Gas & Electric Company
Commercial Operation
Jan 2026
EIA’s August 2026 preliminary inventory lists Santee generator 1 as operating, with January 2026 as its operating month. This monthly inventory record does not disclose a specific contractual commercial-operation day.
San Diego Gas & Electric Company · U.S. Energy Information Administration
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
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AssetOwner / operatorContractorMarket / regulatorRelated asset
Timeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Advice Letter 4290-E filed with CPUCdocs.cpuc.c...
SDG&E submitted Advice Letter 4290-E requesting approval of two EPC contracts with Stella Energy Solutions for 39.6 MW total of utility-owned energy storage, including the 10 MW Santee project.