Solar installations in Loudoun County, VA
490 recorded installations in Loudoun County, Virginia — capacity, prices and the installers doing the work.
At a glance
Loudoun County, Virginia has 490 recorded solar installations totalling 4.9 MW of capacity — the 5th-highest count among the 108 Virginia counties with records, and 3% of the state total. That is about 0.34% of the county's 144,804 housing units, against 0.51% statewide.
Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Search every recorded installation in Loudoun County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 576 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 85% of that. A yardstick, not dated records.
Most active
Top installers in Loudoun County
No resolved installers recorded in this county.
Growth
Installations by year
How does Loudoun County compare with the rest of Virginia?
The median recorded system in Loudoun County is 9.12 kW, about 22% above the state median of 7.49 kW. By share of housing units with a recorded system, Loudoun County ranks 37th of 93 Virginia 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 Loudoun County?
The earliest recorded installation in Loudoun County dates to 2003. The busiest year on record is 2019, with 220 installations. 2024 has 1 recorded installation so far. The county's cumulative total rose from 487 at the end of 2019 to 490 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 Loudoun County?
PanelCensus records 490 solar installations in Loudoun County, Virginia (4.9 MW of capacity) — about 0.34% of the county's 144,804 housing units (U.S. Census ACS). Coverage depends on Virginia's public reporting, so the true total is likely higher.
How big is a typical solar system in Loudoun County?
The median recorded system in Loudoun County is 9.1 kW, against 7.5 kW for Virginia as a whole.
More solar data near Loudoun County
- Solar in Virginia· 18,447 installations
- Solar installers in Virginia
- Solar in Virginia Beach city· 3,914 installations
- Solar in Fairfax County· 1,201 installations
- Solar in Albemarle County· 1,008 installations
- Solar in Augusta County· 478 installations
- Solar in Henrico County· 414 installations
- Solar in Arlington County· 368 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 Loudoun County, Virginia”, https://panelcensus.com/solar/virginia/loudoun-county (data as of October 10, 2026).