SE Athos II, LLC
Solar power plant in Riverside County, California. 200 MW of nameplate capacity across 1 generator, operated by SE Athos II, LLC.
Also known as EIA plant 64290
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 200 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2021First generator online
- Operator
- SE Athos II, LLCEIA operator ID 63869
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Riverside County, CA33.7513, −115.3550
- EIA plant ID
- 64290EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power SE Athos II produces
Free · EIA-923Net generation, 2025
562 GWh
561,991 MWh, final
Capacity factor, 2025
32.1%
2024: 27.7%
January to July 2026
296 GWh
Provisional
Range, 2022 to 2025
487.5–615.7
GWh a year. Low 2024, high 2022
| 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 | 33,259 | Not reported | 1 of 12 |
| 2022 | 615,710 | 35.1% | 12 of 12 |
| 2023 | 575,343 | 32.8% | 12 of 12 |
| 2024 | 487,492 | 27.7% | 12 of 12 |
| 2025 | 561,991 | 32.1% | 12 of 12 |
| 2026 (provisional, partial year) | 295,961 | 29.1% | 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 |
|---|---|---|---|
| IPAT2 | Solar Photovoltaic | 200.0 | December 2021 |
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 II, 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 SE Athos II
How much power does SE Athos II, LLC produce?
SE Athos II, LLC reported 561,991 MWh (562 GWh) of net generation in 2025, a 32.1% capacity factor on 200 MW of nameplate capacity. From January to July 2026 it reported 296 GWh, which is provisional.
Where is SE Athos II, LLC?
SE Athos II, LLC is in Riverside County, California, at 33.7513, −115.3550. It is in the California Independent System Operator balancing area (CISO).
Who operates SE Athos II, LLC?
EIA-860M for August 2026 lists SE Athos II, LLC as the operator (EIA operator ID 63869). The operator is not always the owner.
When did SE Athos II, LLC start operating?
Its first generator began operating in December 2021, according to EIA-860M.
Does InfraMap have power prices for SE Athos II, LLC?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to SE Athos II, LLC, 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