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257 MW Batteries (117 MW) + Solar Photovoltaic (140 MW) operating in Kern, CA — California Independent System Operator
257 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2025
Operating Since
Coordinates
34.8425, -118.3785
County
Kern, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Golden Fields Solar IV, LLC | Golden Fields Solar IV LLC | — |
| Owner(s) | Golden Fields Solar IV, LLC | Golden Fields Solar IV LLC | — |
| Status | Operating | operating | — |
GEM identifies the owner as Golden Fields Solar IV LLC
This entity is not yet in the GEM ownership database — chain unavailable.
Rosamond South 1 is a 257 MW hybrid power plant located in Kern County, California. The facility, which combines solar photovoltaic generation with battery energy storage, is owned and operated by Golden Fields Solar IV, LLC. The plant began operating in 2025 and utilizes fixed-tilt solar tracking. The battery energy storage system (BESS) has a duration of 4.03 hours.
Rosamond South 1 operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. The plant is ranked as the 48th largest in California out of 112 facilities and 191st nationally out of 514. The plant has a reported power purchase agreement (PPA) price of $41.12 per MWh, according to FERC EQR data.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
21.8K MWh
Latest Month
—
Annual Generation
—
Capacity Factor
Golden Fields Solar IV, LLC · Data from 2025
$41.1/MWh
PPA Price
Market Position
ISO/RTO Market
CAISO
LMP Node
SLSTR2_2_SOLAR2-APND
Pricing Hub
TH_SP15_GEN-APND
Location Type
Aggregated Node
Node Source
Curated node match
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California Independent System Operator (CISO)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP