O'Brien Solar Fields — Plant Summary
- EIA Plant ID
- 64590
- Capacity
- 22.1 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Dane, WI
- Operating Since
- 2021
- Generators
- 3
- Operator
- Madison Gas & Electric Co
- Parent Company
- MGE Energy
- Annual Generation
- 38,452 MWh
- Capacity Factor
- 19.8%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
O'Brien Solar Fields
OperatingSolar
Ranked #23 of 102 Solar plants in WI#1536 of 7447 nationally
22.1 MW Solar operating in Dane, WI — Midcontinent Independent Transmission System Operator, Inc..
EIAGEMWD
22.1 MW
Nameplate Capacity
3
Generators
units
Solar Photovoltaic
Technology
2021
Operating Since
Location
Coordinates
42.9977, -89.4590
County
Dane, WI
Nearby Plants
- FitchburgNatural Gas57.6 MW · 1.9 km
- Sunnyside Solar Energy CenterBESS60 MW · 2.3 km
- Strix SolarSolar6 MW · 6.0 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Madison Gas & Electric Co | Madison Gas & Electric | — |
| Owner(s) | Madison Gas & Electric Co | MGE Energy | — |
| Status | Operating | operating | — |
Ownership Chain
About
O'Brien Solar Fields is a 22.1 MW solar photovoltaic power plant located in Dane County, Wisconsin. The plant, which began operating in 2021, is owned by MGE Energy and operated by Madison Gas & Electric Co. It consists of 3 generators utilizing single-axis tracking technology. O'Brien Solar Fields ranks as the 20th largest solar plant in Wisconsin (out of 99) and 1337th nationally (out of 7108).
The plant's latest annual generation was 38,452 MWh, resulting in a capacity factor of 19.8%. O'Brien Solar Fields operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the MRO NERC region. Financial data is available for the plant from LBNL Solar.
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
13.8 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
1.2K MWh
Latest Month
38.5K MWh
Annual Generation
19.8%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: LBNL Utility-Scale SolarHIGH
$51.0/MWh
LCOE (Levelized Cost)
$27.3/MWh
Energy Value
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Fitchburg Substation · 138 kV
Substation Distance
< 10 km
Operator
MG&E
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
MGE.OBRIEN_N
Pricing Hub
MICHIGAN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
General
Morgan Stanley raised MGE Energy (MGEE) price target during utilities review
MGE Energy, Inc. (NASDAQ:MGEE) is included among the Dividend Kings List: Top 15 Stocks. On February 20, Morgan Stanley raised its price...
MSN·4 weeks ago
General
Morgan Stanley raised MGE Energy (MGEE) price target during utilities review
MGE Energy, Inc. (NASDAQ:MGEE) is included among the Dividend Kings List: Top 15 Stocks. On February 20, Morgan Stanley raised its price...
MSN·4 weeks ago
Industry·corporate
UW-Madison launches environmental sustainability initiative
The University of Wisconsin-Madison is launching an environmental sustainability initiative that will include carbon-reduction goals and a...
University of Wisconsin-Madison (other)
WPR·2 years ago
Industry·corporate
New solar field gives UW a sustainable boost
The panels, which provide 20 megawatts of renewable electricity to the local community, are part of O'Brien Solar Fields, a collaborative partnership between...
UW (other)O'Brien Solar Fields (operator)
University of Wisconsin–Madison·4 years ago
Last updated 2026-03-26
View all 10 articles