Ameresco JanesvilleOut of service
Rock County, Wisconsin · EIA plant ID 56427 · Operator: AMERESCO Janesville LLC
Nameplate3MWSummer 3 MW
Generators3in service
Net generation3GWh12 mo to Dec 2025
Capacity factor12%other units, summer MW
Heat rate—thermal plants only
First online2004
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), other 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) |
|---|---|---|---|
| 2005 | 16.5 | 62.9% | — |
| 2006 | 18.6 | 70.8% | — |
| 2007 | 15.1 | 57.6% | — |
| 2008 | 11.1 | 42.2% | — |
| 2009 | 11.8 | 44.9% | — |
| 2010 | 17.5 | 66.8% | — |
| 2011 | 17.8 | 67.6% | — |
| 2012 | 17.2 | 65.1% | — |
| 2013 | 13.5 | 51.4% | — |
| 2014 | 13.9 | 53.0% | — |
| 2015 | 11.5 | 43.7% | — |
| 2016 | 11.2 | 42.5% | — |
| 2017 | 11.1 | 42.2% | — |
| 2018 | 12.7 | 48.4% | — |
| 2019 | 11.5 | 43.7% | — |
| 2020 | 10.8 | 40.8% | — |
| 2021 | 9 | 34.3% | — |
| 2022 | 7.3 | 27.8% | — |
| 2023 | 9 | 34.4% | — |
| 2024 | 9.1 | 34.4% | — |
| 2025 | 3.1 | 11.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| Unit1 | Landfill Gas | IC | 1 | 1 | Oct 2004 | Operating (Out of service) | — | coming soon |
| Unit2 | Landfill Gas | IC | 1 | 1 | Oct 2004 | Operating (Out of service) | — | coming soon |
| Unit3 | Landfill Gas | IC | 1 | 1 | Oct 2004 | Operating (Out of service) | — | coming soon |
Owner / operator
Operator: AMERESCO Janesville LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| AMERESCO Janesville LLC | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Rock County Customer Hosted Solar | 1 MW | 1.7 km |
| Janesville Community Solar | 2 MW | 1.7 km |
| North Rock | 50 MW | 13.2 km |
| Rock River | retired | 13.9 km |
| Riverside Energy Center | 675 MW | 14 km |
| West Riverside Energy Center | 728 MW | 14.1 km |