592.8 MW Solar operating in Sangamon, IL — Midcontinent Independent Transmission System Operator, Inc..
592.8 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2024
Operating Since
Coordinates
39.5373, -89.8098
County
Sangamon, 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 | Double Back Diamond Solar Power, LLC | Swift Current Energy | — |
| Owner(s) | Double Back Diamond Solar Power, LLC | Swift Current Energy [100%] | — |
| Status | Operating | operating | — |
GEM identifies the owner as Swift Current Energy [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
The Double Back Diamond solar power plant is located in Sangamon County, Illinois. The plant, owned and operated by Double Back Diamond Solar Power, LLC, has a total capacity of 592.8 MW and commenced operations in 2024. It utilizes solar photovoltaic technology with single-axis tracking. The plant is interconnected to the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority within the SERC NERC region.
Double Back Diamond is the second-largest solar plant in Illinois out of 19, and ranks twelfth nationally among 639 solar facilities. In its latest year of operation, the plant generated 914,857 MWh of electricity, achieving a capacity factor of 17.6%. Financial data is available for the plant from LBNL, though specific figures are not provided.
Generated from EIA, GEM, and public data sources
NERC Region
SERC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
345 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
29.5K MWh
Latest Month
914.9K MWh
Annual Generation
17.6%
Capacity Factor
$45.6/MWh
LCOE (Levelized Cost)
Market Position
ISO/RTO Market
MISO
LMP Node
AMIL.DBDSOL
Pricing Hub
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
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Last updated 2026-03-14
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