Federal solar credit ended Dec 31, 2025
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Installers · Washington

How to Check a Solar Installer in Washington

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Updated Data verified Nov 5, 2026

We do not rank or rate solar companies, and nobody pays to appear on this site. What we can do is show you how to check any installer in Washington yourself in about ten minutes: the license they must hold, where to look it up, and the consumer rules that protect you when you sign.

On this page [ 5 ]

The license a Washington solar installer needs

Anyone installing or maintaining residential or commercial solar energy systems costing more than $1,000 must hold a Washington L&I electrical contractor license (RCW 19.28.041), and the electrical work must be done by certified electricians.[1]

Official license lookup[2]

A ten-minute installer check

  1. Look up the company's license by number with the official lookup above, and confirm the name and address match the contract.
  2. Ask whether the crew lead holds the NABCEP PV Installation Professional certification (check it in the NABCEP directory[3]). It is voluntary but shows tested experience.
  3. Get at least three written quotes for the same system size, with the price per watt, panel and inverter models and warranty terms spelled out.
  4. Ask who will handle the utility interconnection application and the permit, and who pays if the utility requires a meter or panel upgrade.
  5. Never sign on the first visit; check your cancellation rights and the financing terms, including dealer fees.

Installers we have verified

We only list a company after checking its license record ourselves, and we never show prices or star ratings for installers. No Washington installers are listed yet; use the checks above for any company you are considering.

FAQ

Frequently asked questions

How do I check a solar company's license in Washington?

Use the official lookup: Official license lookup. Search by license number, which should be on the contract and the company's ads.

Can I cancel a solar contract after signing?

Often, yes. For sales made at your home, the FTC's Cooling-Off Rule applies: you can cancel until midnight of the third business day after the sale (Saturdays count) for sales of $25 or more made at your home.[4]

sources

[ 4 ]

Every number on this page links to one of these sources. Dates show when we last checked each one.

  1. Washington contractor licensingapp.leg.wa.gov · checked Nov 5, 2026
  2. Verify a Contractor, Tradesperson or Business - Washington L&Isecure.lni.wa.gov · checked Nov 5, 2026
  3. NABCEP directoriesdirectories.nabcep.org · checked Nov 5, 2026
  4. 16 CFR Part 429, Cooling-Off Ruleecfr.gov · checked Nov 5, 2026