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185 MW BESS operating in Yuma, AZ — California Independent System Operator
185 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
32.9460, -113.4916
County
Yuma, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | AES Clean Energy | — | — |
| Owner(s) | AES Clean Energy | — | — |
| Status | Operating | — | — |
McFarland C is a battery energy storage system (BESS) located in Yuma County, Arizona. The plant has a total capacity of 185 MW and consists of a single generator. It began operating in 2025 and is owned and operated by AES Clean Energy. The BESS has a duration of 4 hours.
The plant's primary fuel source is listed as MWH, indicating it draws power from the grid to charge its batteries. McFarland C operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In terms of size, McFarland C ranks as the 38th largest power plant in Arizona out of 47, and 339th 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
−1.6K MWh
Net Charging
-12.0K MWh
Annual Net Energy
-1.1%
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.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $251.8M
Market Position
ISO/RTO Market
CAISO
LMP Node
HN_LNODER2A
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
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ask pi about McFarland CCalifornia Independent System Operator (CISO)
Grid Voltage
500.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP