Double Back Diamond — Plant Summary
- EIA Plant ID
- 66624
- Capacity
- 592.8 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Sangamon, IL
- Operating Since
- 2024
- Generators
- 1
- Operator
- Double Back Diamond Solar Power, LLC
- Parent Company
- —
- Annual Generation
- 914,857 MWh
- Capacity Factor
- 17.6%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- SERC
Double Back Diamond
OperatingSolar
Ranked #2 of 325 Solar plants in IL#23 of 7447 nationally
592.8 MW Solar operating in Sangamon, IL — Midcontinent Independent Transmission System Operator, Inc..
EIAGEM
592.8 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2024
Operating Since
Location
Coordinates
39.5373, -89.8098
County
Sangamon, IL
Nearby Plants
- Lotus WindWind200 MW · 11.2 km
- Lincoln Land Energy CenterNatural Gas1276.8 MW · 20.2 km
- USS Solar BrickSolar2 MW · 21.0 km
Ownership & Operator
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 | — |
Ownership Chain
GEM identifies the owner as Swift Current Energy [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
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
Engineering & Generators
Grid Context
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
Generation
29.5K MWh
Latest Month
914.9K MWh
Annual Generation
17.6%
Capacity Factor
Financial DataBeta
Source: LBNL Utility-Scale SolarHIGH
$45.6/MWh
LCOE (Levelized Cost)
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
AMIL.DBDSOL
Pricing Hub
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Industry·corporate
Editorial: Illinois must move fast to ensure consumers don’t run short on power
Fifteen months ago, this page warned that Illinois faced likely electricity shortages in the next few years if Gov.
Illinois (other)
Chicago Tribune·3 months ago
Industry·corporate
First data center in Sangamon County
A Dallas-based company is seeking zoning approval to establish a $500 million data center on 280 acres of farmland southwest of Springfield...
Dallas (other)
Illinois Times·5 months ago
Deals·debt financing
Swift Current Energy closes US$242 million financing for Virginia battery storage project
Swift Current Energy has secured US$242 million for what the developer claimed will be the biggest BESS project in the PJM service area.
Swift Current Energy (developer)
Energy-Storage.News·6 months ago
General
Swift Current Energy closes US$242 million financing for Virginia battery storage project
Swift Current Energy has secured US$242 million for what the developer claimed will be the biggest BESS project in the PJM service area.
Energy-Storage.News·6 months ago
Last updated 2026-03-14
View all 10 articles