Marathon Petroleum - Robinson Refinery
Crawford County, Illinois · EIA plant ID 69735 · Operator: Onyx Asset Services Group
Nameplate5MWSummer 5 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor21%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 | 5.4 | 20.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 10676 | Solar Photovoltaic | PV | 5 | 5 | Jun 2025 | Operating | — | coming soon |
Owner / operator
Operator: Onyx Asset Services Group. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Onyx Asset Services Group | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| 950th Sun 2 | 2 MW | 3.1 km |
| Osprey Point RES | 13 MW | 20.1 km |
| Merom | 1,080 MW | 20.1 km |
| Fairbanks Solar Project | 250 MW | 27.4 km |
| Sycamore Riverside Energy, LLC | — | 28.1 km |
| River Ferry Solar 1 | 165 MW | 29.7 km |