Solar installations in Knox County, ME
36 recorded installations in Knox County, Maine — capacity, prices and the installers doing the work.
At a glance
Knox County, Maine has 36 recorded solar installations totalling 30.6 MW of capacity — the 8th-highest count among the 16 Maine counties with records, and under 1% of the state total. That is about 0.15% of the county's 24,428 housing units, against 3.0% statewide.
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 0 hail and 1 high-wind NOAA storm events — a regional inspection/maintenance signal (proximity, not confirmed damage).
Search every recorded installation in Knox County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 203 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 18% of that (this county is under-reported in public program data). A yardstick, not dated records.
Most active
Top installers in Knox County
No resolved installers recorded in this county.
Growth
Installations by year
How does Knox County compare with the rest of Maine?
The median recorded system in Knox County is 52.25 kW, about 6.2 times the state median of 8.4 kW. By share of housing units with a recorded system, Knox County ranks 4th of 13 Maine counties with at least 10 installations. Fewer than 30 systems here report an installed price, so no county price median is published.
How has solar adoption changed in Knox County?
The earliest recorded installation in Knox County dates to 2000. The busiest year on record is 2023, with 7 installations. 2025 has 1 recorded installation so far. The county's cumulative total rose from 17 at the end of 2020 to 36 today. Recent years fill in as state programs and permit offices report, so the latest counts are provisional.
Frequently asked questions
How many homes have solar in Knox County?
PanelCensus records 36 solar installations in Knox County, Maine (30.6 MW of capacity) — about 0.15% of the county's 24,428 housing units (U.S. Census ACS). Coverage depends on Maine's public reporting, so the true total is likely higher.
How big is a typical solar system in Knox County?
The median recorded system in Knox County is 52.3 kW, against 8.4 kW for Maine as a whole.
More solar data near Knox County
- Solar in Maine· 22,412 installations
- Solar installers in Maine
- Solar in Lincoln County· 45 installations
- Solar in Somerset County· 41 installations
- Solar in Aroostook County· 38 installations
- Solar in Oxford County· 36 installations
- Solar in Waldo County· 36 installations
- Solar in Penobscot County· 24 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 Knox County, Maine”, https://panelcensus.com/solar/maine/knox-county (data as of October 10, 2026).