Solar Panel Cost in
Washington

Updated 6/8/2019

How much do solar panels cost in Washington in 2019?

As of December 2019, the average solar panel cost in Washington is $2.84/W. Given a solar panel system size of 5 kilowatts (kW), an average solar installation in Washington ranges in cost from $12,070 to $16,330, with the average gross price for solar in Washington coming in at $14,200. After accounting for the 30% Federal Investment Tax Credit (ITC) and other state and local solar incentives, the net price you'll pay for solar can fall by thousands of dollars.

Average solar panel cost by system size in Washington

System Size System Cost System Cost (after ITC)
3 kW $8,520 $5,964
4 kW $11,360 $7,952
5 kW $14,200 $9,940
6 kW $17,040 $11,928
7 kW $19,880 $13,916
8 kW $22,720 $15,904
9 kW $25,560 $17,892
10 kW $28,400 $19,880

2019 average solar panel cost graph in Washington

for a 5kW system

Great Price
$12,070 or less
Market Average
$14,200
Above Market
$16,330 or more

Solar installation costs do not include the 30% Federal Investment Tax Credit or local incentives. Learn more about local WA incentives, tax credits & rebates.

Payback Period

9.27 Years

20-Year Savings

$17,830

Cost per Watt

$2.84

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True Cost of Solar Guide™ for Washington

Download EnergySage’s DIY worksheet to better understand what solar should cost in your state

Don’t get sold on the hype! Find out what solar should actually cost before you talk to your first sales rep. This PDF worksheet will walk you through the simple calculations you can make to determine what size solar PV system you need, and approximately how much it should cost.