Tully 1
Grundy County, Illinois · EIA plant ID 67255 · Operator: Greenbacker Renewable Energy Corporation
Nameplate2MWSummer 2 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor25%solar units, summer MW
Heat rate—thermal plants only
First online2025
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) |
|---|---|---|---|
| 2025 | 2.2 | 25.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 814 | Solar Photovoltaic | PV | 2 | 2 | Jul 2025 | Operating | — | coming soon |
Owner / operator
Operator: Greenbacker Renewable Energy Corporation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Greenbacker Renewable Energy Corporation | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| NL IL Old Stage | — | 6.7 km |
| USS Middle Solar | — | 13.4 km |
| LaSalle Generating Station | 2,340 MW | 15 km |
| Marseilles Lock and Dam Hydro | — | 16.4 km |
| Grand Ridge Battery Projects | 36 MW | 17 km |
| Grand Ridge Wind Energy Center | 210 MW | 17 km |