Solar installations in Rock County, WI
667 recorded installations in Rock County, Wisconsin — capacity, prices and the installers doing the work.
At a glance
Rock County, Wisconsin has 667 recorded solar installations totalling 228.9 MW of capacity — the 5th-highest count among the 72 Wisconsin counties with records, and 3% of the state total. That is about 0.94% of the county's 70,694 housing units, against 0.83% statewide. The median installed price is $4.60/W before incentives, about 31% above the Wisconsin median of $3.52/W.
Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Severe-weather exposure: solar sites here have been matched to an average of 4.4 hail (1.6 severe) and 3.7 high-wind NOAA storm events — a regional inspection/maintenance signal (proximity, not confirmed damage).
Search every recorded installation in Rock County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 358 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 186% of that. A yardstick, not dated records.
Most active
Top installers in Rock County
| # | Installer | Installs here |
|---|---|---|
| 1 | Everlight Solar | 377 |
| 2 | Midwest Solar Power | 44 |
| 3 | All Energy Solar | 25 |
| 4 | Sun Badger Solar | 24 |
| 5 | Next Energy | 24 |
| 6 | Freedom Forever | 18 |
| 7 | Drews Solar | 14 |
| 8 | Tron Solar | 13 |
| 9 | Arch Electric | 11 |
| 10 | Convergence Energy | 8 |
Growth
Installations by year
How does Rock County compare with the rest of Wisconsin?
The median recorded system in Rock County is 7.13 kW, roughly in line with the state median of 7.4 kW. By share of housing units with a recorded system, Rock County ranks 22nd of 70 Wisconsin counties with at least 10 installations.
How has solar adoption changed in Rock County?
The earliest recorded installation in Rock County dates to 2003. The busiest year on record is 2023, with 143 installations. 2025 has 79 recorded installations so far. The county's cumulative total rose from 131 at the end of 2020 to 667 today. Recent years fill in as state programs and permit offices report, so the latest counts are provisional.
Who installs solar in Rock County?
Everlight Solar has the most recorded installations in Rock County (377, 57% of the county's records). Other active installers here include Midwest Solar Power, All Energy Solar and Sun Badger Solar. Installers based anywhere in Wisconsin are listed in the state installer directory.
Frequently asked questions
How many homes have solar in Rock County?
PanelCensus records 667 solar installations in Rock County, Wisconsin (228.9 MW of capacity) — about 0.94% of the county's 70,694 housing units (U.S. Census ACS). Coverage depends on Wisconsin's public reporting, so the true total is likely higher.
How much does solar cost in Rock County?
The median installed price for recorded systems in Rock County is $4.60/W before incentives; the median system is 7.1 kW. The Wisconsin median is $3.52/W.
Who installs solar in Rock County?
The most active recorded installers in Rock County are Everlight Solar (377), Midwest Solar Power (44) and All Energy Solar (25).
How big is a typical solar system in Rock County?
The median recorded system in Rock County is 7.1 kW, against 7.4 kW for Wisconsin as a whole.
More solar data near Rock County
- Solar in Wisconsin· 22,775 installations
- Solar installers in Wisconsin
- Solar in Milwaukee County· 1,664 installations
- Solar in Waukesha County· 1,165 installations
- Solar in La Crosse County· 1,062 installations
- Solar in Sauk County· 565 installations
- Solar in Eau Claire County· 548 installations
- Solar in Brown County· 459 installations
County assignment is derived from installation ZIP codes via the Census 2020 ZCTA↔county crosswalk (primary county by land-area overlap) — approximate at county boundaries. Market penetration = recorded installations ÷ housing units (U.S. Census Bureau ACS 5-Year, Table B25001); it undercounts where dataset coverage is partial. See methodology.
About this data
Source: Lawrence Berkeley National Laboratory's Tracking the Sun, merged with city permit records, state incentive programs and the USGS U.S. Large-Scale Solar Photovoltaic Database / EIA-860 plant registers, as published October 10, 2026 — PanelCensus refreshes it as each source publishes new records. See the methodology for how records are matched, cleaned and scored.
Cite as: PanelCensus, “Solar installations in Rock County, Wisconsin”, https://panelcensus.com/solar/wisconsin/rock-county (data as of October 10, 2026).