Sapphire Sky Wind Energy LLC
De Witt County, Illinois · EIA plant ID 65316 · Operator: Invenergy Services LLC
Nameplate260MWSummer 260 MW
Generators1in service
Net generation970GWh12 mo to Aug 2026
Capacity factor43%wind units, summer MW
Heat rate—thermal plants only
First online2023
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), wind 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) |
|---|---|---|---|
| 2021 | 0 | — | — |
| 2022 | 0 | — | — |
| 2023 | 716.7 | 34.4% | — |
| 2024 | 950.7 | 41.7% | — |
| 2025 | 925.8 | 40.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 65011 | Onshore Wind Turbine | WT | 259.8 | 259.8 | Feb 2023 | Operating | — | vestas V150-4.2 |
Owner / operator
Operator: Invenergy Services LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| WEC Energy Group | 90.0% | 234 MW |
| Invenergy Services LLC | 10.0% | 26 MW |
Nearby plants
Within 80 km.
| Blue Iris Solar, LLC CSG | 5 MW | 3.2 km |
| Farmer City | 11 MW | 7.1 km |
| Prosperity Wind | 300 MW | 11.9 km |
| Madden Creek Solar | — | 14.4 km |
| SV CSG Mahomet | — | 20.7 km |
| Goose Creek Energy Center | 684 MW | 20.9 km |