O'Brien Solar Fields
2652 S Seminole HWY, Fitchburg, WI 53593Plant Summary Information
O'Brien Solar Fields is ranked #20 out of 112 solar farms in Wisconsin in terms of total annual net electricity generation.
O'Brien Solar Fields generated 4.7 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | O'Brien Solar Fields |
|---|---|
| Utility Name | Madison Gas & Electric Co |
| Location | Dane County, WI |
| Initial Operation Date | May 2021 |
| Last Update | Dec 2025 |
| Annual Generation | 37.4 GWh |
| Annual Consumption | 131.8 k MMBtu |
| Ranked #4,585 out of 13,094 Power Plants Nationwide | |
| Ranked #1,285 out of 7,027 Solar Power Plants Nationwide | |
| Ranked #85 out of 260 Wisconsin Power Plants | |
| Ranked #20 out of 112 Wisconsin Solar Power Plants | |
| Fuel Types | Solar |
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Monthly Net Generation for O'Brien Solar Fields
Monthly Plant Fuel Consumption for O'Brien Solar Fields
O'Brien Solar Fields Details
| Summary Information | |
|---|---|
| Plant Name | O'Brien Solar Fields (64590) |
| Plant Address | 2652 S Seminole HWY, Fitchburg, WI 53593 |
| Utility | Madison Gas & Electric Co (11479) |
| Latitude, Longitude | 42.99767, -89.45895 |
| Generation Dates on File | May 2021 to Dec 2025 |
| Initial Operation Date | May 2021 |
| Annual Generation | 37.4 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 | Madison Gas & Electric Co (11479) WI |
| Grid Voltage | 13.80 kV / 13.80 kV / 13.80 kV |
| Energy Storage | No |
Generator OBSFN Details Operating May 2021
| Technology | Solar Photovoltaic |
|---|---|
| Prime Mover | Photovoltaic |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | MGE.OBRIEN_N |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | MGE.OBRIEN_N |
| Nameplate Capacity | 8.3 MW |
| Summer Capacity | 8.3 MW |
| Winter Capacity | 8.3 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | May 2021 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Solar |
| Carbon Capture Technology | No |
| Other Planned Modifications | No |
| Multiple Fuels | No |
| Solar Details | |
| Single Axis Tracking | Yes |
|---|---|
| Azimuth Angle | 180 |
| DC Net Capacity | 9.1 MW |
| Crystalline Silicon | Yes |
| Net Metering Agreement | No |
| Virtual Net Metering Agreement | No |
Generator OBSFS Details Operating May 2021
| Technology | Solar Photovoltaic |
|---|---|
| Prime Mover | Photovoltaic |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | MGE.OBRIEN_S |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | MGE.OBRIEN_S |
| Nameplate Capacity | 8.3 MW |
| Summer Capacity | 8.3 MW |
| Winter Capacity | 8.3 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | May 2021 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Solar |
| Carbon Capture Technology | No |
| Other Planned Modifications | No |
| Multiple Fuels | No |
| Solar Details | |
| Single Axis Tracking | Yes |
|---|---|
| Azimuth Angle | 180 |
| DC Net Capacity | 9 MW |
| Crystalline Silicon | Yes |
| Net Metering Agreement | No |
| Virtual Net Metering Agreement | No |
Generator OBSFW Details Operating May 2021
| Technology | Solar Photovoltaic |
|---|---|
| Prime Mover | Photovoltaic |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | MGE.OBRIEN_W |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | MGE.OBRIEN_W |
| Nameplate Capacity | 5.5 MW |
| Summer Capacity | 5.5 MW |
| Winter Capacity | 5.5 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | May 2021 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Solar |
| Carbon Capture Technology | No |
| Other Planned Modifications | No |
| Multiple Fuels | No |
| Solar Details | |
| Single Axis Tracking | Yes |
|---|---|
| Azimuth Angle | 180 |
| DC Net Capacity | 6.1 MW |
| Crystalline Silicon | Yes |
| Net Metering Agreement | No |
| Virtual Net Metering Agreement | No |
O'Brien Solar Fields Plant Owners
| Owner Name | Address | Generator | Ownership | We couldn't locate any owners for this plant |
|---|
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Nearby Power Plants
Below are closest 20 power plants surrounding O'Brien Solar Fields.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Albany Solar (WI) | Broadhead, WI | 98.9 GWh | 23.3 mi |
| Blount Street | Madison, WI | 58.6 GWh | 7.1 mi |
| Dane County Airport Solar | Madison, WI | 17.4 GWh | 13 mi |
| Dane County Solar LLC | Cottage Grove, WI | 33.7 GWh | 11.6 mi |
| Diesel Generators | Madison, WI | 1.2 GWh | 7.1 mi |
| Epic Verona | Verona, WI | 1.8 GWh | 5.5 mi |
| Galactic Wind | Waunakee, WI | 21.2 GWh | 9.6 mi |
| Hermsdorf Solar | Madison, WI | 16.4 GWh | 10.9 mi |
| Middleton Airport Solar | Middleton, WI | 7.4 GWh | 9 mi |
| Middleton Biogas Solar, LLC | Middleton, WI | 1.9 GWh | 9.7 mi |
| Nine Springs | Madison, WI | 89.0 MWh | 5.8 mi |
| North Rock | Edgerton, WI | 92.1 GWh | 22.2 mi |
| Prairie Du Sac | Prairie du Sac, WI | 152.9 GWh | 25.5 mi |
| Rock LakeSolar WI, LLC | Waterloo, WI | 318.0 MWh | 25.7 mi |
| RockGen Energy Center | Cambridge, WI | 625.4 GWh | 20.8 mi |
| Strix Solar | Fitchburg, WI | 9.3 GWh | 3.7 mi |
| Sycamore (WI) | Madison, WI | 28.0 MWh | 10.9 mi |
| Tyto Solar | Fitchburg, WI | 11.3 GWh | 4.1 mi |
| UW Kegonsa Customer Hosted Solar | Stoughton, WI | 1.6 GWh | 8.9 mi |
| West Campus Cogeneration Facility | Madison, WI | 305.2 GWh | 5.6 mi |