225 MW Batteries (75 MW) + Solar Photovoltaic (150 MW) operating in San Bernardino, CA — California Independent System Operator
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
| 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
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
VENTANA RELIABILITY PROJECT
14.8K MWh
Latest Month
297.4K MWh
Annual Generation
15.1%
Capacity Factor
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.
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Last updated 2026-03-14
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