WA State Sales Tax Exemption

As of July 1, 2019 the purchase and installation of a solar system in Washington (size 1 KW to 100 KW) is exempt from state sales tax. We will not charge the customer sales tax and there is no need for the customer to apply for a rebate of the sales tax. This incentive was passed by the Washington Legislature in 2019 in a continuing effort to spur the growth of clean renewable electricity in our state. Installation must be completed by Dec. 31, 2029 to qualify for the sales and use tax exemption for labor charges.


Learn more about the sales tax exemption for solar installations along with other “Renewable Energy/Green Incentives” on the State Dept of Revenue website at https://dor.wa.gov/find-taxes-rates/tax-incentives/incentive-programs#1133.  See E2SSB 5116, sections 18 and 19 (Chapter 288, Laws of 2019) for further details. 


WA State Renewable Energy System Incentive Program (RESIP)

RESIP was enacted by the state legislature in July 2017 as the Solar Jobs Bill, SB 5939. It is administered by the WSU Energy Program in Olympia. The goal was to spur continued adoption of clean energy while preserving and growing jobs in renewable energy. It rewards four categories of solar system owners with an annual payment for each kilowatt hour (kWh) the solar system produces as measured on a Production Meter.


Why go solar? Solar systems are long lasting, they will produce clean electricity for more than 25 years.

The state legislature capped total incentive program funding at $110 million (over time) and it appears that maximum has been obligated which means that future applicants are not guaranteed to receive any payments. Utility participation is voluntary and not all utilities participate. Learn more at the WSU Energy Program website which also explains the caps on each utility. 

Although RESIP was designed to help consumers go solar over a 4 year period (2018 through 2021), it was so popular that funds were obligated before the end of the second year. NWES cannot guarantee that current applicants will receive certification nor that future funding will become available to expand the program. Contact WSU Energy Program if you have questions. 

Even without RESIP, the cost of going solar continues to fall. If you are curious about what solar will do for you, get a free estimate today. 

If your solar system was installed after September 30, 2017 and certified by WSU Energy Program, then the following program description applies to you:


Payment year is the state’s fiscal year of July 1 through June 30.


Annual Payment is made to you through your utility.


Payment rate is based on system size, Made in WA content, date inspected and utility participation. [See chart below.]


Maximum annual payment for residential is $5,000/year and for commercial is $25,000/year. 


Payment is made annually until you earn back 50% of the solar system cost or for 8 years (92 months), whichever occurs first.

WA State Renewable Energy System Incentive Program

Residential size is 1 to 12 kW (regardless of type of facility). Commercial size is over 12 kW. A bonus is paid for using Made in Washington solar panels. Shared Commercial and Community Solar are systems with more than one owner and the location’s utility must be involved in the planning and bill credits.

Example System: 10 KW solar that generates 11,000 kWh/year using Made in WA solar modules and installed during year one of the program would earn $.21/kwh which would be  $2,310 for a whole year.



System Certified by: Base Rate: Residential or Community Solar (per KWH) Base Rate: Commercial or Shared Commercial Solar (per KWH) Bonus for Modules (solar panels) Made in WA
6-30-2018 $.16 $.06 $.05
6-30-2019 $.14 $.04 $.04
6-30-2020 $.12 $.02 $.03
6-30-2021 $.10 $.02 $.02

Two Meters Measure Two Different Incentives


This diagram shows the difference between the two metered incentives.


With Net Metering your electricity bill goes down (avoided cost of electricity) because solar electricity is meeting your needs. Furthermore your excess power earns bill credits to bring down your bill at a later date.


In RESIP, the State Incentive Program, you earn a payment for every kilowatt hour generated by solar as measured on a Production Meter for 8 years or until you earn back 50% of your cost, whichever occurs first. NOTE: unless or until new state funds are allocated to this program, payments to new applicants are not guaranteed.

WA State Renewable Energy System Incentive Program


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