Coffeen Solar BESS
Montgomery County, Illinois · EIA plant ID 68147 · Operator: Dynegy Inc
Nameplate46MWSummer 46 MW
Generators2in service
Net generation94GWh12 mo to Aug 2026
Capacity factor24%solar units, summer MW
Heat rate—thermal plants only
First online2024
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2024 | 2.1 | 6.5% | — |
| 2025 | 85.1 | 22.1% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | PV | 44.2 | 44.2 | Dec 2024 | Operating | — | coming soon |
| 2 | Batteries | BA | 2 | 2 | Dec 2024 | Operating | — | coming soon |
Owner / operator
Operator: Dynegy Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Dynegy Inc | 100.0% | 46 MW |
Nearby plants
Within 80 km.
| Horseshoe Solar Project, LLC | — | 9.7 km |
| Anacott | 5 MW | 10 km |
| Bluestar Solar Project, LLC | 5 MW | 10.3 km |
| AC IL - Hillsboro CSG | 5 MW | 12.8 km |
| McCray Solar 1, LLC | 5 MW | 19.7 km |
| PIKE Solar | — | 23 km |