NRG Rockford II Energy Center
Natural gas power plant in Winnebago County, Illinois. 168 MW of nameplate capacity across 1 generator, operated by Rockford Generation LLC.
Also known as EIA plant 55936
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 168 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 2002First generator online
- Operator
- Rockford Generation LLCEIA operator ID 60504
- Grid
- PJMBalancing authority PJM
- Price nodes
- 1 PJM nodeResource nodes with prices
- Location
- Winnebago County, IL42.2383, −89.1011
- EIA plant ID
- 55936EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power NRG Rockford II produces
Free · EIA-923Net generation, 2025
56.1 GWh
56,116 MWh, final
Capacity factor, 2025
3.8%
2024: 4.4%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
46.4–167.8
GWh a year. Low 2023, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 0 | Not reported | 7 of 12 |
| 2003 | 2,957 | Not reported | 12 of 12 |
| 2004 | 6,333 | Not reported | 12 of 12 |
| 2005 | 43,092 | Not reported | 12 of 12 |
| 2006 | 29,178 | Not reported | 12 of 12 |
| 2007 | 34,061 | Not reported | 12 of 12 |
| 2008 | 33,668 | Not reported | 12 of 12 |
| 2009 | 15,599 | Not reported | 12 of 12 |
| 2010 | 17,360 | 1.2% | 12 of 12 |
| 2011 | 27,850 | 1.9% | 12 of 12 |
| 2012 | 38,228 | 2.6% | 12 of 12 |
| 2013 | 22,395 | 1.5% | 12 of 12 |
| 2014 | 48,840 | 3.3% | 12 of 12 |
| 2015 | 114,422 | 7.8% | 12 of 12 |
| 2016 | 118,207 | 8.0% | 12 of 12 |
| 2017 | 81,813 | 5.6% | 12 of 12 |
| 2018 | 122,646 | 8.3% | 12 of 12 |
| 2019 | 85,390 | 5.8% | 12 of 12 |
| 2020 | 82,936 | 5.6% | 12 of 12 |
| 2021 | 167,822 | Not reported | 12 of 12 |
| 2022 | 61,887 | 4.2% | 12 of 12 |
| 2023 | 46,369 | 3.2% | 12 of 12 |
| 2024 | 64,603 | 4.4% | 12 of 12 |
| 2025 | 56,116 | 3.8% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · PJMEmissions
Free · EPA CAMPDCO₂, 2025
31,849
US short tons. 2024: 37,379
SO₂, 2025
0
US short tons
NOx, 2025
15
US short tons
CO₂ per MWh, calculated
0.57 t
About 1,135 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (U1), matched to EIA plant 55936 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GT3 | Natural Gas Fired Combustion Turbine | 168.0 | June 2002 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Rockford Generation LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
300 analyst questions a month, plus MCP
Query NRG Rockford II Energy Center and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near NRG Rockford II
More plants operated by Rockford Generation LLC
Questions about NRG Rockford II
How much power does NRG Rockford II Energy Center produce?
NRG Rockford II Energy Center reported 56,116 MWh (56.1 GWh) of net generation in 2025, a 3.8% capacity factor on 168 MW of nameplate capacity.
Where is NRG Rockford II Energy Center?
NRG Rockford II Energy Center is in Winnebago County, Illinois, at 42.2383, −89.1011. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates NRG Rockford II Energy Center?
EIA-860M for August 2026 lists Rockford Generation LLC as the operator (EIA operator ID 60504). The operator is not always the owner.
When did NRG Rockford II Energy Center start operating?
Its first generator began operating in June 2002, according to EIA-860M.
Does InfraMap have power prices for NRG Rockford II Energy Center?
Yes. InfraMap has PJM day-ahead and real-time prices at 1 price node linked to NRG Rockford II Energy Center, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page