Melrose BESS
Battery storage project in San Diego County, California. 20 MW of nameplate capacity across 2 generators, operated by San Diego Gas & Electric Co.
Also known as EIA plant 66281
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 20 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- March 2024First generator online
- Operator
- San Diego Gas & Electric CoEIA operator ID 16609
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 2 CAISO nodesResource nodes with prices
- Location
- San Diego County, CA33.2072, −117.2528
- EIA plant ID
- 66281EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Melrose BESS produces
Free · EIA-923Net generation, 2025
−2.42 GWh
−2,420 MWh, final
Battery discharge, 2025
11.3 GWh
Charge 13.7 GWh
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2024 to 2025
−2.4–−2.4
GWh a year. Low 2025, high 2024
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | −2,408 | Not reported | 12 of 12 |
| 2025 | −2,420 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Battery plants can report negative net generation, when charging uses more energy than they discharge.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Batteries | 10.0 | March 2024 |
| 2 | Batteries | 10.0 | March 2024 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists San Diego Gas & Electric Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Melrose BESS
More plants operated by San Diego Gas & Electric Co
Questions about Melrose BESS
How much power does Melrose BESS produce?
Melrose BESS reported −2,420 MWh (−2.42 GWh) of net generation in 2025.
Where is Melrose BESS?
Melrose BESS is in San Diego County, California, at 33.2072, −117.2528. It is in the California Independent System Operator balancing area (CISO).
Who operates Melrose BESS?
EIA-860M for August 2026 lists San Diego Gas & Electric Co as the operator (EIA operator ID 16609). The operator is not always the owner.
When did Melrose BESS start operating?
Its first generator began operating in March 2024, according to EIA-860M.
Does InfraMap have power prices for Melrose BESS?
Yes. InfraMap has CAISO day-ahead and real-time prices at 2 price nodes linked to Melrose BESS, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page