Solar installations in Washington County, WI
307 recorded installations in Washington County, Wisconsin — capacity, prices and the installers doing the work.
At a glance
Washington County, Wisconsin has 307 recorded solar installations totalling 8.9 MW of capacity — the 17th-highest count among the 72 Wisconsin counties with records, and 1% of the state total. That is about 0.52% of the county's 58,766 housing units, against 0.83% statewide. The median installed price is $3.79/W before incentives, roughly in line with 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 5.5 hail (0.5 severe) and 1.5 high-wind NOAA storm events — a regional inspection/maintenance signal (proximity, not confirmed damage).
Search every recorded installation in Washington County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 209 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 147% of that. A yardstick, not dated records.
Most active
Top installers in Washington County
| # | Installer | Installs here |
|---|---|---|
| 1 | Arch Electric | 57 |
| 2 | Everlight Solar | 38 |
| 3 | Sun Badger Solar | 26 |
| 4 | All Energy Solar | 22 |
| 5 | Home Team Energy | 21 |
| 6 | Elevated Solar Performance | 12 |
| 7 | Endries Solar Electric | 11 |
| 8 | Solcius | 10 |
| 9 | Sunvest Solar | 10 |
| 10 | Sunrun | 10 |
Growth
Installations by year
How does Washington County compare with the rest of Wisconsin?
The median recorded system in Washington County is 8.2 kW, about 11% above the state median of 7.4 kW. By share of housing units with a recorded system, Washington County ranks 44th of 70 Wisconsin counties with at least 10 installations.
How has solar adoption changed in Washington County?
The earliest recorded installation in Washington County dates to 2003. The busiest year on record is 2025, with 63 installations. The county's cumulative total rose from 96 at the end of 2020 to 307 today. Recent years fill in as state programs and permit offices report, so the latest counts are provisional.
Who installs solar in Washington County?
Arch Electric has the most recorded installations in Washington County (57, 19% of the county's records). Other active installers here include Everlight Solar, Sun Badger Solar and All Energy Solar. Installers based anywhere in Wisconsin are listed in the state installer directory.
Frequently asked questions
How many homes have solar in Washington County?
PanelCensus records 307 solar installations in Washington County, Wisconsin (8.9 MW of capacity) — about 0.52% of the county's 58,766 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 Washington County?
The median installed price for recorded systems in Washington County is $3.79/W before incentives; the median system is 8.2 kW. The Wisconsin median is $3.52/W.
Who installs solar in Washington County?
The most active recorded installers in Washington County are Arch Electric (57), Everlight Solar (38) and Sun Badger Solar (26).
How big is a typical solar system in Washington County?
The median recorded system in Washington County is 8.2 kW, against 7.4 kW for Wisconsin as a whole.
More solar data near Washington County
- Solar in Wisconsin· 22,775 installations
- Solar installers in Wisconsin
- Solar in Pierce County· 314 installations
- Solar in Iowa County· 311 installations
- Solar in Ozaukee County· 309 installations
- Solar in St. Croix County· 302 installations
- Solar in Winnebago County· 302 installations
- Solar in Columbia County· 301 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 Washington County, Wisconsin”, https://panelcensus.com/solar/wisconsin/washington-county (data as of October 10, 2026).