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50 MW Solar operating in Rock, WI
50 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2022
Operating Since
Coordinates
42.8099, -89.1018
County
Rock, WI
Nearby Plants
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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 | — |
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
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
3.2K MWh
Latest Month
100.7K MWh
Annual Generation
23.0%
Capacity Factor
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Solar photovoltaic · Wisconsin Power and Light Company · Data from 2022–2024
$1,763/kW
Installed Cost
$3/kW
Annual CapEx
$3.9/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Point 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
Alt. Hub / Zone
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-04-09
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