Baldy Mesa Solar & Storage
Solar and battery storage project in San Bernardino County, California. 225 MW of nameplate capacity across 2 generators, operated by AES Clean Energy.
Also known as EIA plant 66598
This project groups Baldy Mesa Solar & Storage (EIA 66598). EIA reports them as separate plants.
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 225 MWSolar 150.0 · Battery storage 75.0
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 2024First generator online
- Operator
- AES Clean EnergyEIA operator ID 64904
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 2 CAISO nodesResource nodes with prices
- Location
- San Bernardino County, CA34.6092, −117.4543
- EIA plant ID
- 66598EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Baldy Mesa Solar & Storage produces
Free · EIA-923Net generation, 2025
297 GWh
297,449 MWh, final
Capacity factor, 2025
23.1%
2024: 9.6%
January to July 2026
183 GWh
Provisional
| 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 | 31,334 | 9.6% | 3 of 12 |
| 2025 | 297,449 | 23.1% | 12 of 12 |
| 2026 (provisional, partial year) | 183,199 | 24.5% | 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 |
|---|---|---|---|
| BDMSS | Batteries | 75.0 | May 2024 |
| BLDMS | Solar Photovoltaic | 150.0 | May 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 AES Clean Energy 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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Power plants near Baldy Mesa Solar & Storage
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Questions about Baldy Mesa Solar & Storage
How much power does Baldy Mesa Solar & Storage produce?
Baldy Mesa Solar & Storage reported 297,449 MWh (297 GWh) of net generation in 2025, a 23.1% capacity factor on 225 MW of nameplate capacity. From January to July 2026 it reported 183 GWh, which is provisional.
Where is Baldy Mesa Solar & Storage?
Baldy Mesa Solar & Storage is in San Bernardino County, California, at 34.6092, −117.4543. It is in the California Independent System Operator balancing area (CISO).
Who operates Baldy Mesa Solar & Storage?
EIA-860M for August 2026 lists AES Clean Energy as the operator (EIA operator ID 64904). The operator is not always the owner.
Is Baldy Mesa Solar & Storage a solar or a battery storage plant?
Both. Solar capacity totals 150 MW and battery storage capacity totals 75 MW.
When did Baldy Mesa Solar & Storage start operating?
Its first generator began operating in May 2024, according to EIA-860M.
Does InfraMap have power prices for Baldy Mesa Solar & Storage?
Yes. InfraMap has CAISO day-ahead and real-time prices at 2 price nodes linked to Baldy Mesa Solar & Storage, 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