250 MW Solar operating in Clay, IL — Midcontinent Independent Transmission System Operator, Inc..
250 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2024
Operating Since
Coordinates
38.7485, -88.5469
County
Clay, IL
Nearby Plants
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Invenergy Services LLC | Invenergy | — |
| Owner(s) | Invenergy Services LLC | WEC Energy Group | — |
| Status | Operating | operating | — |
Maple Flats is a 250 MW solar photovoltaic power plant located in Clay County, Illinois. The plant began operating in 2024 and has a single generator utilizing single-axis tracking technology. It is owned by WEC Energy Group and operated by Invenergy Services LLC. Maple Flats interconnects to the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority and resides within the SERC NERC region.
In its most recent year of operation, Maple Flats generated 493,105 MWh of electricity, achieving a capacity factor of 22.5%. The plant is ranked as the 5th largest solar facility out of 19 in Illinois, and 140th out of 639 solar facilities nationally. Financial data for the plant is available from LBNL, indicating it is tracked in research on solar power purchase agreements and installed costs.
Generated from EIA, GEM, and public data sources
NERC Region
SERC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
138 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
17.9K MWh
Latest Month
493.1K MWh
Annual Generation
22.5%
Capacity Factor
$41.3/MWh
LCOE (Levelized Cost)
Market Position
ISO/RTO Market
MISO
LMP Node
AMIL.CLAY_1.AZ
Pricing Hub
ILLINOIS.HUB
Location Type
Trading Hub
Node Source
Curated node match
Last updated 2026-03-26
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