30% Federal Tax Credit
The federal government offers a tax credit (not a deduction) for 30% of the total installation cost. If you do not have the tax liability in one year to take advantage of this credit, you can roll it over for multiple years to take full advantage of the credit.
WA State Production Incentive
WA state will pay you for every kWh produced, even if you use the energy in your own home or building. The rate depends on which fiscal year the system is placed into service and that set rate will be paid for 8 years. Customers will receive a bonus amount per kWh if they elect to install panels that are manufactured in Washington. For residential systems, this incentive will cover 40%-50% of the total cost. Commercial systems can receive up to $25,000 per year.