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Installer profile

ION Solar Oklahoma

D
D grade. ION Solar has third party verified volume and a published 10 year workmanship guarantee, but a 2024 Utah consumer protection settlement and a 12 citation OSHA history are government enforcement, which caps the grade at D, and no Oklahoma CIB electrical license was found under the names checked.

ION Solar is a national residential installer headquartered in Utah, not a local Oklahoma company, and you should judge it on the national record rather than the local storefront. Its Oklahoma City BBB record is thin and clean, an A rating on a file opened August 20, 2024 with no complaints shown, rated that way purely on length of time in business. The headquarters record is where the history lives: an A+ accredited profile carrying 320 complaints in the last 3 years, 100 closed in the last 12 months, and a government action alert. Recent complaints from July 2026 describe aggressive door-to-door sales, no-soliciting violations, panel-removal delays, service delays, and a $1,500 cancellation fee dispute. One more oddity worth knowing: the ionsolar.com homepage state list omits Oklahoma entirely, even though the company runs a dedicated Oklahoma page, BBB lists Oklahoma in its service area, and Solar Power World verifies Oklahoma installs.

The grade cap comes from two government records. On November 4, 2024, ION Solar settled with the Utah Division of Consumer Protection over 2,999 alleged violations of the Utah Residential Solar Energy Disclosure Act for failing to provide a required disclosure document, agreeing to a $32,000 fine and a cease and desist. Separately, the US Department of Labor reported in June 2023 that ION had been cited 12 times by OSHA since 2018, including a willful fall-protection citation with a $170,992 proposed penalty after inspectors found employees on an icy two-story roof without fall protection. Neither item happened in Oklahoma. Both describe how the company sells and how it runs job sites, which is exactly what an Oklahoma homeowner is buying. Under our rubric, government enforcement caps a grade at D.

The strengths are real and worth stating plainly. ION is the only company on our Oklahoma City track with third party volume evidence: 2026 Solar Power World rank 70 nationally with 56,430.60 kW installed, and rank 6 in Oklahoma with 870.53 kW installed in the state. Its Oklahoma page publishes an actual warranty stack, a 10 year workmanship guarantee covering work performed on your home during installation, 25 year product workmanship and 30 year power output warranties on panels, 25 year inverter coverage, and 10 years on the Tesla Powerwall 3. It also states installs are performed by a 100 percent in-house team. Those published terms beat most of what we see, though they remain company claims until they are in your contract.

On licensing, Oklahoma has no solar-specific license; the credential is the CIB electrical contractor license, held by a company or its qualifying electrician. The complete CIB electrical roster contains no ION SOLAR, no name containing SOLAR, and no entry for owner Jimmy Slemboski. The roster lists people, not companies, so a qualifying electrician under another surname would not surface. No license was found under the names checked. Before signing, ask ION for the name and CIB license number of the electrician of record for your permit, get the disclosure paperwork the Utah settlement was about, and read it before the sales rep leaves.

The evidence

LongevityVerified

The company about page says trusted in solar since 2013 and the US Department of Labor also states the company was founded in 2013, while the BBB headquarters record dates the business start to January 20, 2006; the BBB accreditation date of June 10, 2013 and incorporation date of July 1, 2013 side with 2013. The Oklahoma City operation is much younger, with a local BBB file opened August 20, 2024.

Source: US Department of Labor news release, June 27, 2023

Complaints and enforcementAdverse record

Government enforcement exists on two fronts: a November 4, 2024 settlement with the Utah Division of Consumer Protection over 2,999 alleged Residential Solar Energy Disclosure Act violations, with a $32,000 fine and a cease and desist, and an OSHA record of 12 citations since 2018 including a willful fall-protection citation carrying a $170,992 proposed penalty. The BBB headquarters profile adds 320 complaints in the last 3 years, 100 closed in the last 12 months, with July 2026 complaints describing aggressive door-to-door sales and service delays.

Source: ION Solar BBB government action alert

Verifiable volumeVerified

Solar Power World ranks ION Solar 70th on its 2026 national Top Solar Contractors list with 56,430.60 kW installed, and 6th in Oklahoma with 870.53 kW installed in the state, the only company on this track with any third party volume evidence. The site separately claims 85,000 plus installs across the United States, which is a company figure, not the verified one.

Source: Solar Power World, 2026 Top Oklahoma Solar Contractors

License statusPending verification

Oklahoma licenses the electrical contractor through the CIB; there is no solar-specific license. The complete CIB electrical roster contains no ION SOLAR, zero licensee names containing SOLAR, and no SLEMBOSKI entries, so the qualifying individual for ION's Oklahoma electrical work, if any, is not identifiable from the public roster. The roster is person-name based; no license was found under the names checked, which is not a finding that the company is unlicensed.

Source: Oklahoma CIB licensee search

Warranty termsCompany claim

The company's Oklahoma page publishes a 10 year workmanship guarantee stating all work performed on the home during installation is covered for a full decade, plus 25 year product workmanship and 30 year power output panel warranties, 25 year manufacturer coverage on MLPE inverters, and 10 years on the Tesla Powerwall 3. These are published company terms, not independently verified coverage; confirm they appear in the contract.

Source: ION Solar Oklahoma page

Company facts

Legal entityION Solar, LLC, headquartered at 44 E 800 N, Orem, UT; alternate names ION Developer LLC and Solar Sales LLC; the DOL describes the company as based in Provo, Utah
Oklahoma City operationBranch with its own BBB record, rating A, not accredited, file opened August 20, 2024, no street address or complaint counts shown
CIB electrical licenseNone found under the names checked; no ION SOLAR, no name containing SOLAR, and no Slemboski entries in the CIB electrical roster
Founding2013 per the company site and the US Department of Labor; the BBB business start of January 20, 2006 conflicts
Utah DCP settlementNovember 4, 2024; 2,999 alleged Residential Solar Energy Disclosure Act violations, $32,000 fine, cease and desist; DCP Case No. 141205
OSHA historyCited 12 times since 2018 per the DOL; willful fall-protection citation with a $170,992 proposed penalty in 2023; prior violations in CO, TX, VA, OR, and NC
BBB complaints, national320 complaints in the last 3 years, 100 closed in the last 12 months, on the A+ accredited headquarters profile with a government action alert
Volume record2026 Solar Power World national rank 70 with 56,430.60 kW installed; Oklahoma rank 6 with 870.53 kW installed in the state
Published warranty10 year workmanship guarantee; 25 year product workmanship and 30 year power output panel warranties; 25 year MLPE inverter coverage; 10 year Tesla Powerwall 3
Crew claimSays installations and maintenance are performed by a 100 percent in-house team
Stated service areaBBB lists Utah, Nevada, Colorado, New Mexico, Texas, North Carolina, Virginia, Oregon, Oklahoma, and Arizona; the ionsolar.com homepage state list omits Oklahoma while a dedicated Oklahoma page exists

Data pulled August 30, 2026 from ION Solar BBB headquarters profile, ION Solar BBB complaints, ION Solar BBB government action alert, Utah DCP settlement document, US Department of Labor OSHA release, Oklahoma CIB licensee search, ION Solar Oklahoma page and Solar Power World 2026 Oklahoma list.

How to read this

This D is a rubric cap driven by government enforcement, the Utah consumer protection settlement and the OSHA citation history, sitting on top of a heavy national complaint file. It is not a claim that ION cannot build a working system; the verified Oklahoma volume and the published 10 year workmanship guarantee say it can. If you proceed anyway, do it with the enforcement record in mind: insist on the qualifying electrician's CIB license number, get every disclosure document in writing before signing, and treat the warranty as real only once it is in the contract. Our full rubric, including how our own installation business gets graded on the same scale, is on the methodology page. We are a solar installer and we partner with other solar companies. Grading is structurally separated from revenue; see disclosures.