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- Wind & solar
- Storage
- Loads
- In development
- Under construction
- Operating
- Size not stated
- 10 · 100 · 1,000 MW
Map
- Wind & solar
- Storage
- Loads
- In development
- Under construction
- Operating
- Size not stated
Onion River: location and 3 exact-grade projects within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Onion River
Power plant · Solar
Key facts
Power plant · Solarran 19% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 2023
- Net generation, 2025
- 255,689 MWh
- Grid
- 138 kV to American Transmission Co (MISO)
- Location
- Sheboygan County, Wisconsin
- Operated by
- Wisconsin Power & Light CoSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
Details
Who’s behind it
No companies named in filings yet.
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- Technology
- Solar source: “Solar Photovoltaic”
- Age
- 3 years since 2023
All 6 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Gem |
|
| Grid |
|
| Fuel burned (MMBtu), 2025 | 872,410 |
| Capacity factor, 2025 | 0.195 |
| Net generation (MWh), 2025 | 255,689 |
| Balancing authority code | MISO |
Solar arrays
Solar arrays
The array area counts panels and inverters only, not buildings, fences or the whole site.
- Array area (acres)
- 670
- AC capacity (MW)
- 150
- DC capacity (MW)
- 180.1
- Mounting
- Fixed tilt
- Site type
- Greenfield
- Began operating
- 2023
Timeline
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · GEM · USPVDB · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory
Sources
- EIA-860M
- GEMGlobal Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- USPVDBMap services and data are available from Large-Scale Solar Photovoltaic Database, provided by the U.S. Geological Survey and Lawrence Berkeley National Laboratory via https://energy.usgs.gov/uspvdb
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| Lyndon Solar WI, LLC Filed | Solar | 5.3 mi | 5 |
| Vantage 100T Crane 1 (Port Washington data centre) Filed | Large load | 11.9 mi | |
| Edgewater Under construction | Storage | 12.4 mi | 99 |
Sources EIA-860M · FAA OE/AAA