Search
Search plants, projects, owners, and states
Search plants, projects, owners, and states
22.1 MW Solar operating in Dane, WI — Midcontinent Independent Transmission System Operator, Inc..
22.1 MW
Nameplate Capacity
3
Generators
units
Solar Photovoltaic
Technology
2021
Operating Since
Coordinates
42.9977, -89.4590
County
Dane, WI
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Madison Gas & Electric Co | Madison Gas & Electric | — |
| Owner(s) | Madison Gas & Electric Co | MGE Energy | — |
| Status | Operating | operating | — |
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
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
13.8 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
1.2K MWh
Latest Month
38.5K MWh
Annual Generation
19.8%
Capacity Factor
Data from 2021–2024
$27.3/MWh
Energy Value
$2.5/MWh
Capacity Value
Point 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
Alt. Hub / Zone
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about O'Brien Solar Fields