PanelCensus

Solar installations in Washington

8,324 recorded installations — prices, growth by year, county breakdown and the installers doing the work.

Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.

Installations
8,324
Total capacity
358.0 MW
Median price
$3.26/W
pre-incentive
Third-party owned
0%
lease / PPA

Most active

Top installers in Washington

#InstallerInstalls in WA

Washington installer directory →

Growth

Installations by year

2006
4$2.46/W
2007
2$2.70/W
2008
5$2.62/W
2011
1
2012
6$4.96/W
2013
4$3.03/W
2014
7$3.99/W
2015
17$3.00/W
2016
96$3.67/W
2017
1,074$3.56/W
2018
4,294$3.45/W
2019
984$3.37/W
2020
32$1.96/W
2021
109$1.93/W
2022
389$1.20/W
2023
459$1.20/W
2024
317$2.00/W
2025
179$3.07/W
2026
7$1.74/W

Bars: recorded installs · right column: median $/W that year.

By county

Solar by county in Washington

CountyInstallsCapacityMedian $/W
King County1,66115.6 MW$3.42/W
Clark County5416.2 MW$3.58/W
Snohomish County4856.5 MW$3.30/W
Benton County4589.1 MW$3.70/W
Spokane County4484.1 MW$4.11/W
Pierce County4013.8 MW$3.61/W
Whatcom County3903.8 MW$2.97/W
Yakima County3284.8 MW$2.82/W
Kittitas County23744.2 MW$2.61/W
Franklin County1871.9 MW$3.69/W
Thurston County1581.7 MW$3.54/W
Skagit County1461.9 MW$3.00/W
Kitsap County1371.2 MW$3.80/W
Walla Walla County1201.2 MW$3.92/W
Clallam County106944 kW$4.36/W
Jefferson County1021.1 MW$3.97/W
Cowlitz County99926 kW$3.77/W
Island County85833 kW$3.07/W
Lewis County78695 kW$3.74/W
San Juan County62600 kW$3.04/W
Mason County43585 kW$3.68/W
Okanogan County41321 kW$3.90/W
Skamania County38327 kW$3.44/W
Grays Harbor County32272 kW$3.82/W
Klickitat County29234 kW$3.32/W
Stevens County29320 kW$3.28/W
Grant County25304 kW$4.30/W
Whitman County24382 kW$3.99/W
Pacific County18178 kW$3.64/W
Ferry County17251 kW$4.09/W
Lincoln County14126 kW$4.26/W
Adams County1155.9 MW$3.88/W

Counties derived from installation ZIP codes (Census ZCTA crosswalk) — approximate at boundaries. Counties with fewer than 50 recorded installs are shown but not indexed.

Frequently asked questions

How many solar installations are there in Washington?

PanelCensus records 8,324 solar installations in Washington, totalling 358.0 MW of capacity — compiled from LBNL's Tracking the Sun, city permit records, state programs and USGS/EIA utility-scale data. (Coverage depends on what the state publishes, so actual totals are higher.)

How much does solar cost per watt in Washington?

The median installed price across priced systems in Washington is $3.26/W pre-incentive. Year-by-year medians are shown on this page.

Who are the biggest solar installers in Washington?

No resolved installers recorded.