Solar installations in Waldo County, ME
36 recorded installations in Waldo County, Maine — capacity, prices and the installers doing the work.
At a glance
Waldo County, Maine has 36 recorded solar installations totalling 66.3 MW of capacity — the 10th-highest count among the 16 Maine counties with records, and under 1% of the state total. That is about 0.16% of the county's 22,118 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 1.4 hail and 0 high-wind NOAA storm events — a regional inspection/maintenance signal (proximity, not confirmed damage).
Search every recorded installation in Waldo County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 267 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 13% of that (this county is under-reported in public program data). A yardstick, not dated records.
Most active
Top installers in Waldo County
No resolved installers recorded in this county.
Growth
Installations by year
How does Waldo County compare with the rest of Maine?
The median recorded system in Waldo County is 94.4 kW, about 11 times the state median of 8.4 kW. By share of housing units with a recorded system, Waldo County ranks 3rd 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 Waldo County?
The earliest recorded installation in Waldo County dates to 2002. The busiest year on record is 2021, with 8 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 Waldo County?
PanelCensus records 36 solar installations in Waldo County, Maine (66.3 MW of capacity) — about 0.16% of the county's 22,118 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 Waldo County?
The median recorded system in Waldo County is 94.4 kW, against 8.4 kW for Maine as a whole.
More solar data near Waldo County
- Solar in Maine· 22,412 installations
- Solar installers in Maine
- Solar in Aroostook County· 38 installations
- Solar in Knox County· 36 installations
- Solar in Oxford County· 36 installations
- Solar in Penobscot County· 24 installations
- Solar in Franklin County· 23 installations
- Solar in Sagadahoc County· 19 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 Waldo County, Maine”, https://panelcensus.com/solar/maine/waldo-county (data as of October 10, 2026).