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150 MW Solar operating in Cass, IL
150 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2024
Operating Since
Coordinates
39.9778, -90.4711
County
Cass, IL
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Union Electric Co - (MO) | Union Electric Co | — |
| Owner(s) | Union Electric Co - (MO) | Ameren | — |
| Status | Operating | operating | — |
The Cass County Renewable Energy Center is a 150 MW solar photovoltaic power plant located in Cass County, Illinois. The plant began operating in 2024 and has one generator. It is owned by Ameren and operated by Union Electric Co. (MO), a subsidiary of Ameren. The facility utilizes single-axis tracking technology to maximize solar energy capture.
The plant's latest annual generation was 331,772 MWh, resulting in a capacity factor of 25.2%. The installed cost was $2,089.91 per kW, according to FERC data. The Cass County Renewable Energy Center is interconnected to the Midcontinent Independent Transmission System Operator (MISO) balancing authority and is located within the SERC NERC region. It is the 9th largest solar plant in Illinois out of 19, and ranks 399th nationally out of 639 solar plants.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
138.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
12.1K MWh
Latest Month
331.8K MWh
Annual Generation
25.2%
Capacity Factor
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Solar photovoltaic · UNION ELECTRIC COMPANY · Data from 2024
$2,090/kW
Installed Cost
$1536.7/MWh
Operating Cost
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Market Position
ISO/RTO Market
MISO
LMP Node
AMMO
Pricing Hub
ILLINOIS.HUB
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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