IL2- WI114 Harper
Will County, Illinois · EIA plant ID 70480 · Operator: Madison Energy Investments LLC
Nameplate2MWSummer 2 MW
Generators1in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online2025
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
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.
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 |
|---|---|---|---|---|---|---|---|---|
| SP422 | Solar Photovoltaic | PV | 2 | 2 | Oct 2025 | Operating | — | coming soon |
Owner / operator
Operator: Madison Energy Investments LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Madison Energy Investments LLC | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| IL2 - W109 | — | 0.6 km |
| IGS East Central, LLC | 2 MW | 1.3 km |
| IKEA Joliet Rooftop PV System | 2 MW | 3.5 km |
| IL Joliet 1101 Cherry Hl Rd | 4 MW | 3.7 km |
| Jake Energy Storage Center | retired | 6.9 km |
| Joliet 9 | retired | 7.5 km |