As of 2025, the average cost of solar panels in Washington is $3. 19 per watt, making a typical 7. 2 kilowatt (kW) solar system $16,078 after claiming the 30% federal solar tax credit now available.
As of January 2025, the average solar panel system costs $2.58/W including installation in Washington. For a 5 kW installation, this comes out to about $12,901 before incentives, though prices range from $10,966 to $14,836. After the federal tax credit, the average price drops by 30%. You'll probably pay even less than what we show here.
While a 5 kW system will only cost you $12,901 in Washington, doubling the system size effectively doubles the price, so you'll pay about twice that for a 10 kW system. The higher the price tag, though, the more you'll get back as a credit towards your federal tax bill. Are solar panels worth it in Washington?
How much does solar cost in Seattle WA?
As of July 2024, the average solar panel cost in Seattle, WA is $2.84/W. If you install a 5 kW system it will cost you between $12,076 to $16,338, with an average cost of $14,207. What incentives are available for solar in Seattle, WA?
You'll pay an average of $14,207 to install a 5 kilowatt solar panel system in Seattle, WA, before incentives. The federal investment tax credit (ITC) lowers that price by 30% of all your solar equipment and installation costs. Compare multiple offers and save up to 20% How much do solar panels cost in Seattle, WA in 2024?
Do solar panels pay off in Washington?
Based on feedback from dozens of solar customers in Washington, the consensus is that solar panel investments pay off over time. On average, Washington homeowners with solar panels avoid $59,116 in total utility costs over 25 years. The average solar panel installation costs $2.68 per watt in Washington.
How much do solar panels cost?
The cost of solar panels in Washington is lower than the average price of $3.00 per watt for residential solar power systems across the United States. The size of a solar panel system influences the installation cost, as larger installations can benefit from bulk pricing, resulting in a lower cost per watt.