Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/64590
EIA plant 64590
Fitchburg · Dane · WI
O'Brien Solar Fields
Operated by Madison Gas & Electric Co
Published location
Where is O'Brien Solar Fields?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
42.997665, -89.458945
Open the interactive map ↗Map data © OpenStreetMap contributors
Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the WI plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
1845
22,665
33,300
43,784
54,596
64,325
74,796
84,214
94,256
103,325
111,177
121,169
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 845 |
| 2 | 2,665 |
| 3 | 3,300 |
| 4 | 3,784 |
| 5 | 4,596 |
| 6 | 4,325 |
| 7 | 4,796 |
| 8 | 4,214 |
| 9 | 4,256 |
| 10 | 3,325 |
| 11 | 1,177 |
| 12 | 1,169 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 845 MWh |
| 2 | 2,665 MWh |
| 3 | 3,300 MWh |
| 4 | 3,784 MWh |
| 5 | 4,596 MWh |
| 6 | 4,325 MWh |
| 7 | 4,796 MWh |
| 8 | 4,214 MWh |
| 9 | 4,256 MWh |
| 10 | 3,325 MWh |
| 11 | 1,177 MWh |
| 12 | 1,169 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| OBSFN | Solar Photovoltaic | SUN | 8.3 | OP |
| OBSFS | Solar Photovoltaic | SUN | 8.3 | OP |
| OBSFW | Solar Photovoltaic | SUN | 5.5 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
64590
Sector
Electric Utility
Water source
Unavailable
Data edition
2024-final
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right O'Brien Solar Fields power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at O'Brien Solar Fields
Variation in the published months
Across 12 numeric monthly generation entries, 7 has the highest recorded value (4,796 MWh) and 1 the lowest (845 MWh). Their difference is 3,951 MWh. Missing months have not been treated as zero.
Reading the MW column
In the 3 numeric rows displayed in this table, MW ranges from 5.5 (OBSFW) to 8.3 (OBSFN, OBSFS). The difference is 2.8 in the column's stated units. This summary covers the displayed rows and retains the table's period and scope.