Double Back Diamond

Double Back Diamond is a 593 MW solar farm in Sangamon County, Illinois, operated by Double Back Diamond Solar Power, LLC. EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 2024.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity
592.8 MW
592.8 MW net summer
Generating units
1
In service
2024
EIA plant ID
66624

Where it is

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County
Sangamon County, Illinois
Coordinates
39.5373, -89.8098
Balancing authority
MISO
Sector
IPP Non-CHP

Units, technology and status

Operator of record
Double Back Diamond Solar Power, LLC
Primary energy source
Solar
Technologies
Solar Photovoltaic
Status
Operating

Every plant Double Back Diamond Solar Power, LLC reports to EIA →

Double Back Diamond: FAQ

Where is Double Back Diamond?
In Sangamon County, Illinois (IL). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Double Back Diamond?
593 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Double Back Diamond?
EIA-860M names Double Back Diamond Solar Power, LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Double Back Diamond LLC?
Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Double Back Diamond Solar Power, LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Double Back Diamond LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Double Back Diamond still running?
EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.