Solar Borrego I
Solar power plant in San Diego County, California. 26 MW of nameplate capacity across 1 generator, operated by NRG Solar Borrego I.
Also known as EIA plant 57455
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 26 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- February 2013First generator online
- Operator
- NRG Solar Borrego IEIA operator ID 57271
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- San Diego County, CA33.2989, −116.3508
- EIA plant ID
- 57455EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Solar Borrego I produces
Free · EIA-923Net generation, 2025
61.3 GWh
61,307 MWh, final
Capacity factor, 2025
26.9%
2024: 27.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
61.3–71.4
GWh a year. Low 2025, high 2015
| 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 | 0 | Not reported | 1 of 12 |
| 2013 | 66,993 | Not reported | 12 of 12 |
| 2014 | 73,138 | 32.1% | 12 of 12 |
| 2015 | 71,444 | 31.4% | 12 of 12 |
| 2016 | 71,082 | 31.1% | 12 of 12 |
| 2017 | 69,024 | 30.3% | 12 of 12 |
| 2018 | 68,512 | 30.1% | 12 of 12 |
| 2019 | 66,362 | 29.1% | 12 of 12 |
| 2020 | 65,167 | 28.5% | 12 of 12 |
| 2021 | 70,418 | 30.9% | 12 of 12 |
| 2022 | 64,706 | 28.4% | 12 of 12 |
| 2023 | 64,610 | 28.4% | 12 of 12 |
| 2024 | 62,170 | 27.2% | 12 of 12 |
| 2025 | 61,307 | 26.9% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
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 |
|---|---|---|---|
| SB1 | Solar Photovoltaic | 26.0 | February 2013 |
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 NRG Solar Borrego I as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Questions about Solar Borrego I
How much power does Solar Borrego I produce?
Solar Borrego I reported 61,307 MWh (61.3 GWh) of net generation in 2025, a 26.9% capacity factor on 26 MW of nameplate capacity.
Where is Solar Borrego I?
Solar Borrego I is in San Diego County, California, at 33.2989, −116.3508. It is in the California Independent System Operator balancing area (CISO).
Who operates Solar Borrego I?
EIA-860M for August 2026 lists NRG Solar Borrego I as the operator (EIA operator ID 57271). The operator is not always the owner.
When did Solar Borrego I start operating?
Its first generator began operating in February 2013, according to EIA-860M.
Does InfraMap have power prices for Solar Borrego I?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Solar Borrego I, 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