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100 MW BESS operating in Los Angeles, CA — California Independent System Operator
100 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2021
Operating Since
Coordinates
33.7702, -118.0997
County
Los Angeles, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | AES ES Alamitos, LLC | — | — |
| Owner(s) | AES ES Alamitos, LLC | — | — |
| Status | Operating | — | — |
AES ES Alamitos, LLC is a 100 MW battery energy storage system (BESS) located in Los Angeles County, California. The plant, which began operating in 2021, is owned and operated by AES ES Alamitos, LLC. It utilizes lithium-ion batteries (LIB) to provide grid services within the California Independent System Operator (CAISO) balancing authority, part of the Western Electricity Coordinating Council (WECC) NERC region. The facility has a total storage capacity of 400 MWh, providing a duration of 4 hours at its full power rating.
The plant is fueled by electricity (MWH) drawn from the grid to charge its batteries. AES ES Alamitos, LLC ranks as the 108th largest power plant in California out of 112, and 490th nationally out of 514.
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
12.47 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
−1.0K MWh
Net Charging
-13.5K MWh
Annual Net Energy
-1.5%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
2021
$1,796/kW
Est. Construction Cost
Total estimated cost: $179.6M
Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Shared substation inference
Last updated 2026-03-26
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