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150 MW Solar operating in Cass, IL — Midcontinent Independent Transmission System Operator, Inc..
150 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2024
Operating Since
Coordinates
39.9778, -90.4711
County
Cass, IL
Nearby Plants
| 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
12.1K MWh
Latest Month
331.8K MWh
Annual Generation
25.2%
Capacity Factor
Solar photovoltaic · UNION ELECTRIC COMPANY · Data from 2024
$2,090/kW
Installed Cost
$1536.7/MWh
Operating Cost
Market Position
ISO/RTO Market
MISO
LMP Node
AMMO
Pricing Hub
ILLINOIS.HUB
Node Source
EIA-860 direct report
Last updated 2026-03-26
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