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128.9 MW Solar operating in Imperial, CA — California Independent System Operator
128.9 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2013
Operating Since
Coordinates
32.6633, -115.6583
County
Imperial, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | CSOLAR IV South LLC | First Solar | — |
| Owner(s) | Tenaska CSOLAR South Holdings, LLC, Tenaska CSOLAR South, LLC, Tenaska IV South Partners, LLC | Tenaska Energy | — |
| Status | Operating | operating | — |
The Tenaska Imperial Solar Energy Center South is a 130 megawatt (MW) photovoltaic power plant built in Imperial County, California. Construction began in December 2011 and full commercial operation was achieved in November 2013. Power is sold to San Diego Gas & Electric on a 25-year agreement.
Read more on WikipediaImperial Solar Energy Center South is a 128.9 MW solar photovoltaic power plant located in Imperial County, California. The plant began operating in 2013 and has one generator. It is owned by Tenaska Energy and operated by CSOLAR IV South LLC. The plant utilizes a fixed-tilt solar tracking system. It is interconnected to the California Independent System Operator (CAISO) balancing authority within the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of data, the plant generated 264,268 MWh of electricity, resulting in a capacity factor of 23.3%. The plant's power purchase agreement (PPA) price is $148.44 per MWh. Imperial Solar Energy Center South is ranked as the 43rd largest solar plant in California out of 59, and 465th nationally out of 639.
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
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
18.3K MWh
Latest Month
264.3K MWh
Annual Generation
23.3%
Capacity Factor
Data from 2013–2024
$9.8/MWh
Energy Value
$9.6/MWh
Capacity Value
Market Position
ISO/RTO Market
CAISO
LMP Node
CSLR4S_2_SOLAR
Pricing Hub
TH_SP15_GEN-APND
Node Source
EIA-860 direct report
Last updated 2026-03-14
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