Top Solar Installation Companies in Washington
5.Revolution Solar at Southeast/Anacostia Waterfront
5.0★ (4 reviews)
5.0★ from 4 reviews
Solar Installation Cost in Washington
Local ranges, adjusted for area wage and cost-of-living data.
| Service | Typical range in Washington |
|---|---|
| 6 kW system, installed | $17,429–$24,040/job |
| 8 kW system, installed | $23,199–$32,093/job |
| 10 kW system, installed | $28,968–$40,147/job |
Solar Installation prices in Washington run about 20% above the national average, based on what this trade earns in the metro area — so neighbouring cities in the same metro see similar rates.
Quotes on this page come from 6 companies serving Washington, rated 4.7★ on average across 691 customer reviews.
Washington Climate & Seasonal Timing
What Washington's weather means for scheduling solar installation.
- Last spring frost
- April 1
- First fall frost
- November 2
- Annual precipitation
- 43.53"
- Heating degree days
- 4,178
- Cooling degree days
- 1,533
| Month | Low | High | Precip |
|---|---|---|---|
| Jan | 26.7° | 44.3° | 3.09" |
| Feb | 28.8° | 48° | 2.9" |
| Mar | 36° | 56.4° | 3.72" |
| Apr | 45.3° | 67.5° | 3.51" |
| May | 55.1° | 76.7° | 4.28" |
| Jun | 64.7° | 85.6° | 4.08" |
| Jul | 69.6° | 89.6° | 4.32" |
| Aug | 67.7° | 88.3° | 3.41" |
| Sep | 59.4° | 81.1° | 3.76" |
| Oct | 47° | 69.9° | 3.79" |
| Nov | 38.3° | 59.3° | 3.47" |
| Dec | 30.1° | 48.2° | 3.2" |
NOAA station data 2.57 miles from Washington.
Permits & Regulations in DC
Permit typically required
- Electrical work in the District requires a licensed master electrician through the Board of Industrial Trades
- Electrical contractors also hold a Basic Business License with the appropriate endorsement
- Permits are issued by the Department of Buildings
License required: DC master electrician license (Board of Industrial Trades) and business license
Sources: dlcp.dc.gov
Solar Installation FAQs for Washington
How much does solar cost in Washington?
A 6 kW home solar system in Washington typically runs $17429-$24040 installed, before any incentives.
How many solar installers serve Washington?
We track 6 solar installation companies serving Washington.
Is solar installation in Washington more expensive than average?
Electrical installation labor in Washington runs about +20.2% versus the national average.
Do I need a permit for solar panels in Washington, DC?
In DC, Electrical work in the District requires a licensed master electrician through the Board of Industrial Trades. Rooftop solar in Washington needs a building and electrical permit plus a utility interconnection agreement.
Is there a federal solar tax credit in 2026?
No for homeowners buying a system: the residential federal credit ended December 31, 2025, so a Washington quote of $17429-$24040 is close to the out-of-pocket cost unless a state or utility rebate applies.
How much does air conditioning drive solar savings in Washington?
Washington sees about 1,533 cooling degree days a year; the more air conditioning a home runs, the more of a solar systems output it uses directly.
How many quotes should I get for solar in Washington?
At least three; with 6 installers serving Washington, compare the price per watt, panel and inverter models, and the workmanship warranty.
Does heat reduce solar output in Washington?
Slightly; panels lose efficiency on days near 90F, so Washington quotes should use temperature-adjusted production estimates.
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