SolarData USA

Solar Energy in Washington - Installation Data & Costs

Total Installations
6,327
Total Capacity
92 MW
Average Cost
$3.61/W

Median: $3.48/W

National Rank
#24

96% residential

10.69¢
Electricity Rate (kWh)
3.5h
Peak Sun Hours/Day
23.1 yrs
Est. Payback Period
$1,584
Est. Annual Savings

Environmental & Community Impact

CO₂ Offset/Year
102,628 tons
CO₂ Offset/System/Year
10.5 tons
Installations per 10K Residents
8.2
State Population
7,688,549
Est. Annual Production/System
14,819 kWh

Estimates based on average system size, 3.5h peak sun hours/day, 80% derating factor, and 30% federal ITC. Sources: NREL, EIA, EPA eGRID (0.709 metric tons CO₂/MWh).

System Overview

Avg System Size
14.5 kW

Cost Trend ($/W)

Avg Cost per Watt

2012201320142015201620172018

Installation Growth (Last 5 Years)

Top Solar Installers in Washington

InstallerInstallations
-16,327

Most Popular Panel Brands in Washington

BrandInstallations
Itek Energy LLC4,124
Silfab Solar Inc.632
SunPower369
LG Electronics Inc.254
Qcells North America219
CSI Solar Co., Ltd.178
SolarWorld177
SolarCity Corp91
Heliene62
REC Solar54

Solar by County - Washington

CountyInstallationsCapacity
King1,38512.1 MW
Clark5725.2 MW
Snohomish4685.3 MW
Spokane4333.6 MW
Benton3974.3 MW
Pierce3683.1 MW
Yakima3445.3 MW
Whatcom3412.9 MW
Kittitas2283.1 MW
Franklin1871.9 MW
Thurston1571.5 MW
Skagit1461.9 MW
Kitsap1371.2 MW
Walla Walla1201.2 MW
Clallam1050.9 MW

Washington Solar Incentives

Tax credits, rebates & programs

Is Solar Worth It in Washington?

Data-backed analysis

Source: