Rosamond South 1 — Plant Summary
- EIA Plant ID
- 67764
- Capacity
- 257 MW
- Primary Fuel
- Solar
- Technology
- Batteries, Solar Photovoltaic
- Status
- Operating
- Location
- Kern, CA
- Operating Since
- 2025
- Generators
- 2
- Operator
- Golden Fields Solar IV, LLC
- Parent Company
- —
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Rosamond South 1
OperatingBESSSolarHybrid
Ranked #39 of 963 Solar plants in CA#181 of 7447 nationally
257 MW Batteries (117 MW) + Solar Photovoltaic (140 MW) operating in Kern, CA — California Independent System Operator
EIAGEM
257 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2025
Operating Since
Location
Coordinates
34.8425, -118.3785
County
Kern, CA
Nearby Plants
- Golden Fields Solar I, LLCSolar54 MW · 0.9 km
- Solar Star California, XLI, LLCSolar54 MW · 0.9 km
- Golden Field Solar III, LLCBESS339 MW · 1.6 km
Ownership & Operator
| 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 | — |
Ownership Chain
GEM identifies the owner as Golden Fields Solar IV LLC
This entity is not yet in the GEM ownership database — chain unavailable.
About
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
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
230 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
21.8K MWh
Latest Month
—
Annual Generation
—
Capacity Factor
Financial DataBeta
Source: FERC Electric Quarterly ReportsHIGH
$41.1/MWh
PPA Price
Golden Fields Solar IV, LLC
Contract Seller
Pricing & Market Data
MEDIUM confidenceMarket 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
News & Articles (3)Beta
Deals·ppa
Clearway negotiates 560MWh tolling agreements with California IOU SDG&E, sells BESS to yieldco
Clearway Energy Group has negotiated tolling agreements with SDG&E for one of its solar and storage complexes in Kern County, California.
Clearway Energy Group (seller)SDG&E (buyer)
Energy-Storage.News·3 months ago
Industry·corporate
Clearway wraps up 140-MW solar, 117-MW storage project in Kern County
Clearway Energy Group announced that its Rosamond South 1 project in Kern County, California, has reached commercial operations.
Clearway Energy Group (developer)
Solar Power World·4 months ago
Deals·debt financing
Wilson Sonsini Advises Clearway on $550 Million Construction Financing
On August 26, 2024, Clearway Energy Group announced that it has closed $550 million in construction financing and started construction on...
Clearway Energy Group (other)Wilson Sonsini (other)
Wilson Sonsini·1 years ago
Last updated 2026-03-14
View all articles