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225 MW Batteries (75 MW) + Solar Photovoltaic (150 MW) operating in San Bernardino, CA
225 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2024
Operating Since
Coordinates
34.6092, -117.4543
County
San Bernardino, CA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | AES Clean Energy | AES | — |
| Owner(s) | AES Clean Energy | AES | — |
| Status | Operating | operating | — |
Baldy Mesa Solar & Storage is a hybrid power plant located in San Bernardino County, California. The plant, owned by AES and operated by AES Clean Energy, began operating in 2024. It has a total capacity of 225 MW and consists of two generators utilizing both solar photovoltaic and battery storage technologies. The battery energy storage system (BESS) has a capacity of 300 MWh, providing a duration of 4 hours and employing lithium-ion battery (LIB) chemistry. The solar component uses single-axis tracking.
The plant's latest annual generation was 297,449 MWh, resulting in a capacity factor of 15.1%. Baldy Mesa Solar & Storage operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. The plant ranks 59th out of 112 power plants in California and 240th out of 514 nationally. Financial data is available for the plant from LBNL Solar.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
115.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
14.8K MWh
Latest Month
297.4K MWh
Annual Generation
15.1%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
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Data from 2024
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Point of Interconnection
Nearest Substation
Hamlin Substation · 230 kV
Substation Distance
< 10 km
Operator
AES
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Shared substation inference
Substation identified. Node ID not yet resolved against ISO roster.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-04-19
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Data tables and metrics from the InfraSure database.
Top solar plant owners in the US
Data tables and metrics from the InfraSure database.
Top 10 solar states
Data tables and metrics from the InfraSure database.
Forward forecasts, scenario decomposition, and risk-decision tooling for this asset.