Grant County

6006 Stage Rd, Town of Potosi, WI 53820

Plant Summary Information

Grant County is ranked #15 out of 261 power plants in Wisconsin in terms of total annual net electricity generation.

Grant County generated 128.0 GWh during the 3-month period between May 2026 to August 2026.

Plant Name	Grant County
Utility Name	Wisconsin Power & Light Co
Location	Grant County, WI
Initial Operation Date	May 2024
Last Update	Aug 2026
Annual Generation	376.0 GWh
Annual Consumption	1.4 M MMBtu
Ranked #1,755 out of 13,301 Power Plants Nationwide
Ranked #239 out of 7,209 Solar Power Plants Nationwide
Ranked #15 out of 261 Wisconsin Power Plants
Ranked #1 out of 113 Wisconsin Solar Power Plants
Fuel Types	Solar

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Summary Information
Plant Name	Grant County (65007)
Plant Address	6006 Stage Rd, Town of Potosi, WI 53820
Utility	Wisconsin Power & Light Co (20856)
Latitude, Longitude	42.71898, -90.70104
Generation Dates on File	Jun 2024 to Aug 2026
Initial Operation Date	May 2024
Annual Generation	376.0 GWh
Fuel Types	Solar

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Regulated
NERC Region	MRO
Balancing Authority	Midcontinent Independent Transmission System Operator, Inc.. (MISO)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source
Ash Impoundment	No
Transmission / Distribution Owner	American Transmission Co (659)
Grid Voltage	138.00 kV
Energy Storage	Yes

* Data obtained from the 2025 EIA 860 Report

Technology	Solar Photovoltaic
Prime Mover	Photovoltaic
Ownership	Single Owner
RTO ISO LMP Node Designation	ALTE.GRANTCTY
RTO ISO Location Designation For Reporting Wholesale Sales Data	ALTE.GRANTCTY
Nameplate Capacity	200 MW
Nameplate Power Factor	0.95
Summer Capacity	200 MW
Winter Capacity	200 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	May 2024
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Solar
Solid Fuel Gasification	No
Carbon Capture Technology	No
Other Planned Modifications	No
Multiple Fuels	No

Solar Details
Single Axis Tracking	Yes
DC Net Capacity	256 MW
Crystalline Silicon	Yes
Thin Film CDTE	Yes
Net Metering Agreement	No
Virtual Net Metering Agreement	No

Technology	Batteries
Prime Mover	Battery
Ownership	Single Owner
RTO ISO LMP Node Designation	ALTE.WOOD.ESR
RTO ISO Location Designation For Reporting Wholesale Sales Data	ALTE.WOOD.ESR
Nameplate Capacity	100 MW
Nameplate Power Factor	0.95
Summer Capacity	100 MW
Winter Capacity	100 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	October 2025
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Electricity used for energy storage
Solid Fuel Gasification	No
Carbon Capture Technology	No
Other Planned Modifications	No
Multiple Fuels	No
Cofire Fuels	No
Switch Between Oil And Natural Gas	No

Energy Storage Details
Nameplate Energy Capacity MWH	400
Maximum Charge Rate	100 MW
Maximum Discharge Rate	100 MW
Storage Technology	ECC
Nameplate Reactive Power Rating	79.9
Storage Enclosure Type	OT
Arbitrage	P
Direct Support Of Another Unit	No
Support T D Asset	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Solar.

Rank	Plant Name	Plant Location	Annual Generation
#229	Impact Solar 1	Deport, TX	388.1 GWh
#230	Yellow Pine II	Enterprise, NV	373.2 GWh
#231	Crane Solar Project	Crane, TX	387.3 GWh
#232	Buena Vista Energy Center	Chaparral, NM	381.6 GWh
#233	Madison Fields Solar Project, LLC	Irwin, OH	383.9 GWh
#234	Corazon Energy LLC	Rachito Las Lomas, TX	382.5 GWh
#235	Chestnut	Lemoore, CA	358.1 GWh
#236	Shakes Solar	Carrizo Springs, TX	380.6 GWh
#237	TAG	Rio Rancho, NM	370.1 GWh
#238	Yellow Pine Solar	Enterprise, NV	367.2 GWh
#240	Riverstart Solar Park LLC	Modoc, IN	377.0 GWh
#241	Solar Gen 2 Solar Facility	Calipatria, CA	376.7 GWh
#242	Cavalry Solar Hybrid	Monon, IN	359.8 GWh
#243	Scarlet II Hybrid	Cantua Creek, CA	350.9 GWh
#244	Swift Air Solar I	Goldsmith, TX	373.0 GWh
#245	Mustang Two	Lemoore, CA	372.7 GWh
#246	Markum Solar Farm	Valley Mills, TX	372.2 GWh
#247	Forgeview Solar	Blytheville, AR	371.2 GWh
#248	Lund Hill Solar	Bickleton, WA	368.7 GWh
#249	Prairie Wolf Solar LLC	North Ashmore, IL	368.0 GWh

Below are closest 20 power plants surrounding Grant County.

Plant Name	Plant Location	Annual Generation	Distance
Alliant SBD 9205 A Y McDonald	Dubuque, IA	16.7 MWh	15.9 mi
Alliant SBD 9301 Prairie Farms	Dubuque, IA	68.6 MWh	13.1 mi
Apple Canyon Lake Solar	Apple River, IL	3.2 GWh	32.9 mi
Badger Hollow I	Montfort, WI	198.7 GWh	23.7 mi
Badger Hollow II	Cobb, WI	211.7 GWh	23.7 mi
Bellevue	Bellevue, IA	10.0 MWh	35.5 mi
Cascade	Cascade, IA	31.0 MWh	33.1 mi
Cassville Solar	Cassville, WI	98.8 GWh	11.7 mi
Earlville	Earlville, IA	7.0 MWh	33 mi
Elk Wind Farm	Greeley, IA	172.9 GWh	35.3 mi
Fennimore	Fennimore, WI	75.0 MWh	18.4 mi
Fennimore Solar	Fennimore, WI	4.8 GWh	17.5 mi
Hopkinton	Hopkinton, IA	54.0 MWh	38 mi
John Deere Dubuque Works	Dubuque, IA	54.0 MWh	10.1 mi
McGregor	McGregor, IA	11.0 MWh	31.9 mi
Montfort Wind Energy Center	Montfort, WI	50.6 GWh	23.2 mi
Mt. Hope DPC Solar	Mt. Hope, WI	2.1 GWh	18.9 mi
Quilt Block Wind Farm LLC	Darlington, WI	369.3 GWh	22.4 mi
Red Barn Energy	Montfort, WI	257.2 GWh	20.8 mi
West Dubuque Solar	Dubuque, IA	6.3 GWh	16.4 mi