North Rock — Plant Summary
- EIA Plant ID
- 65010
- Capacity
- 50 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Rock, WI
- Operating Since
- 2022
- Generators
- 1
- Operator
- Wisconsin Power & Light Co
- Parent Company
- Alliant Energy
- Annual Generation
- 100,733 MWh
- Capacity Factor
- 23.0%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
North Rock
OperatingSolar
Ranked #20 of 102 Solar plants in WI#1362 of 7447 nationally
50 MW Solar operating in Rock, WI — Midcontinent Independent Transmission System Operator, Inc..
EIAGEMWD
50 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2022
Operating Since
Location
Coordinates
42.8099, -89.1018
County
Rock, WI
Nearby Plants
- Rock County Customer Hosted SolarSolar1.4 MW · 11.6 km
- RockGen Energy CenterNatural Gas561 MW · 19.0 km
- Hackbarth Solar WI, LLCSolar5 MW · 20.3 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wisconsin Power & Light Co | Wisconsin Power and Light | — |
| Owner(s) | Wisconsin Power & Light Co | Alliant Energy | — |
| Status | Operating | operating | — |
Ownership Chain
About
North Rock is a 50 MW solar photovoltaic power plant located in Rock County, Wisconsin. The plant began operating in 2022 and is owned by Alliant Energy and operated by Wisconsin Power & Light Co. It utilizes a single-axis tracking system to maximize solar energy capture. As of its latest annual generation data, North Rock produced 100,733 MWh, achieving a capacity factor of 23.0%.
The plant is connected to the Midcontinent Independent Transmission System Operator (MISO) balancing authority. North Rock is ranked as the 15th largest solar plant in Wisconsin out of 99, and 1159th nationally out of 7108. Financial data indicates an installed cost of $1756 per kW, based on FERC data.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
69 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Interconnection Queue1 projectBeta
OperationalSolar50 MWMISOLBNL + Live
Generation
3.2K MWh
Latest Month
100.7K MWh
Annual Generation
23.0%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$1,763/kW
Installed Cost
$3.9/MWh
Operating Cost
Wisconsin Power and Light Company
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
North Rock Solar · 69 kV
Substation Distance
< 10 km
Operator
Alliant Energy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
ALTE.NROCK
Pricing Hub
MICHIGAN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Industry·corporate
Construction in Motion on Alliant Energy's Solar in Wisconsin
The projects are included in the company's Clean Energy Blueprint, a plan for cost-effectively accelerating its transition to renewable energy while...
Alliant Energy (developer)
CSRwire·2 weeks ago
Industry·other
Port Washington approves $8B AI data center, residents voice energy and water concerns
Port Washington officials approved a development agreement for an $8 billion AI data center campus to the dismay of residents critical of...
Milwaukee Journal Sentinel·7 months ago
Industry·corporate
Alliant Energy’s proposed natural gas facility fuels Beloit area climate concerns
The facility would house more than two billion cubic feet of fossil fuels in Rock County, Wisconsin.
Alliant Energy (developer)
WIFR·8 months ago
Regulatory·state puc
Janesville-area Dawn Harvest solar farm gets state approval
The Public Service Commission of Wisconsin unanimously approved the Dawn Harvest Solar Energy Center Thursday, giving the green light to a...
Public Service Commission of Wisconsin (regulator)
GazetteXtra·11 months ago
Last updated 2026-03-14
View all 10 articles