As of January 2026, the average solar panel system costs $2. 75/W including installation in Seattle, WA. 02 kW system (the average system size in Seattle, WA), this comes out to about $35,866 before any available incentives, though prices range from $30,486 to. . Solar energy systems convert sunlight into electricity to power your home. When you have solar panels on your home, you typically purchase less electricity from us because you are producing some or all the power your home needs. When you generate more electricity than you need, City Light credits. . If you live in Seattle, you've likely noticed higher electricity bills from Seattle City Light and Puget Sound Energy (PSE). And when winter storms roll in, power outages leave your home in the dark. 19 per watt, making a typical 7. 2 kilowatt (kW) solar system $16,078 after claiming the 30% federal solar tax credit now available. This is. . You'll pay an average of $35,866 to install a 13.
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