Athos Solar Project
Solar power plant in Riverside County, California. 250 MW of nameplate capacity across 1 generator, operated by SE Athos I, LLC.
Also known as EIA plant 63300
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 250 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 2022First generator online
- Operator
- SE Athos I, LLCEIA operator ID 62983
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Riverside County, CA33.7513, −115.3550
- EIA plant ID
- 63300EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Athos Solar Project produces
Free · EIA-923Net generation, 2025
700 GWh
700,249 MWh, final
Capacity factor, 2025
32.0%
2024: 28.1%
January to July 2026
397 GWh
Provisional
Range, 2023 to 2025
618.1–707.0
GWh a year. Low 2024, high 2023
| 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 | 440,276 | Not reported | 7 of 12 |
| 2023 | 707,034 | 32.3% | 12 of 12 |
| 2024 | 618,067 | 28.1% | 12 of 12 |
| 2025 | 700,249 | 32.0% | 12 of 12 |
| 2026 (provisional, partial year) | 397,453 | 31.2% | 7 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 |
|---|---|---|---|
| IPAT1 | Solar Photovoltaic | 250.0 | June 2022 |
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 SE Athos I, LLC 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 Athos Solar Project
How much power does Athos Solar Project produce?
Athos Solar Project reported 700,249 MWh (700 GWh) of net generation in 2025, a 32.0% capacity factor on 250 MW of nameplate capacity. From January to July 2026 it reported 397 GWh, which is provisional.
Where is Athos Solar Project?
Athos Solar Project is in Riverside County, California, at 33.7513, −115.3550. It is in the California Independent System Operator balancing area (CISO).
Who operates Athos Solar Project?
EIA-860M for August 2026 lists SE Athos I, LLC as the operator (EIA operator ID 62983). The operator is not always the owner.
When did Athos Solar Project start operating?
Its first generator began operating in June 2022, according to EIA-860M.
Does InfraMap have power prices for Athos Solar Project?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Athos Solar Project, 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