By The Roofing Brief Team. Last reviewed: October 2026.
A solar system installer in 2026 falls into one of three business models (national dealer-installer, regional integrated installer, or EPC-only specialist), and the company that knocks on your door, the company that quotes the system, and the company that puts panels on your roof may be three different entities. The national dealer-installers like Sunrun, Sunnova, and Trinity Solar use armies of 1099 sales reps to source customers and then route the actual install to subcontracted EPC (engineering, procurement, construction) crews. Regional installers like Freedom Forever, GreenHome Systems, and Ion Solar handle sales and install in-house within a defined geography. Local EPC-only specialists never knock on a door but show up at the end of a referral chain to install whatever the dealer sold. Each model has a different cost structure and warranty path, and a different chance that someone answers the phone when a panel fails in year 11.
The three business models
The national dealer-installer model is what most homeowners encounter first. Sunrun is the largest by installed base, with approximately 1 million customers under contract as of mid-2026 and a national footprint covering 22 states plus DC. Sunnova reorganized under Chapter 11 in 2025 and emerged with a leaner cost structure, refocused on solar-plus-storage in markets with high time-of-use rate spreads. Palmetto operates as a software-and-marketplace model that connects homeowners with vetted installers, taking a referral spread. Trinity Solar runs an integrated sales-and-install model in the Northeast corridor. Momentum Solar covers California, Texas, Florida, and the Northeast. ADT Solar (formerly Sunpro) was wound down by ADT in 2024, and the customer base was sold off to other installers in 2025.
Regional installers are the middle tier. Freedom Forever operates as a hybrid dealer and installer across roughly 25 states. GreenHome Systems works in the Southwest and Mountain West. Ion Solar runs in Utah, Idaho, Arizona, Nevada, and a handful of additional states. Suntuity covers the Mid-Atlantic and Florida. These companies typically have a defined service area where they handle the full sales-design-install cycle in-house, which means the install quality is correlated with the company brand rather than dispersed across subcontractors.
EPC-only specialists are the third model. These are the crews that show up to install when a dealer has sold the job. Most do not market directly to homeowners and instead operate as B2B installation partners for the dealer networks. A homeowner working with an EPC-only specialist usually arrives by referral from a roofer, an electrician, or a local energy advisor. Going direct to an EPC can cut cost because the dealer markup and sales commission are stripped out (see the 10 to 25 percent range below). The downside is that the homeowner is responsible for the financing, the equipment selection, and the permit coordination that a dealer would normally handle.
What the EPC model actually means
EPC stands for engineering, procurement, construction. An EPC installer does the engineering on your specific roof (panel layout, structural review, electrical design), procures the equipment from distributors, and performs the construction. An EPC-only operator does not sell financing, does not run lead generation, and does not market directly to homeowners. They install for dealers, for residential energy companies, and for direct-to-consumer customers who have done their own homework.
The benefit of working with an EPC directly: you can usually shave 10 to 25 percent off the dealer price, because the dealer’s overhead (sales rep commission, marketing spend, financing markup) is stripped out. The cost: you handle the equipment decisions, the financing arrangement (cash, HELOC, solar loan from a credit union), the utility interconnection paperwork, and any state incentive filings. If you are comfortable with the homework, the EPC route saves real money. If you want a single point of contact for sales-to-service, the integrated regional installer is the better fit.
NABCEP and what certifications actually mean
The North American Board of Certified Energy Practitioners (NABCEP) is the residential solar industry’s primary certification body. The PV Installation Professional (PVIP) certification requires documented field experience plus an exam. The PV Installer Specialist is the lower-tier credential. The PV Design Specialist covers the design side rather than the install side. The PV Commissioning and Maintenance Specialist covers ongoing service.
When you ask whether an installer is NABCEP-certified, the right follow-up question is whether the lead installer on your specific project will be NABCEP-certified, not just whether the company has any certified employees on payroll. National dealers often advertise NABCEP certification on their corporate website while the actual installer crew may not include a NABCEP-certified lead. Insist on naming the lead installer in writing and verifying their certification in the NABCEP certificant directory on nabcep.org. Our detailed framework for vetting solar installers is in how to choose solar installer.
State licensing: the other gating credential
Every state with meaningful solar volume requires either a specific solar contractor license or a general electrical contractor license with solar endorsement. California requires a C-46 Solar Contractor license or a C-10 Electrical license (the C-10 covers systems below specific thresholds). Florida requires an Electrical Contractor (EC) or Electrical Class C (ECC) license, with a Solar Contractor license required for some installations. Arizona requires a CR-11 Solar/Wind license. Texas requires a licensed Master Electrician sign-off on the electrical work but does not have a separate solar license. New York requires an electrical contractor license issued at the municipality level (NYC is different from Buffalo is different from Albany).
Check the license number on the state contractor license board database (California’s is the CSLB) before signing. The license should be in the company name, not an employee’s name, with active status and no suspensions. A 2-minute search on the state board website confirms the license class, status and any disciplinary history.
The financing structure trap
Most national dealer-installers in 2026 push three financing options: a cash purchase, a solar loan, or a Power Purchase Agreement (PPA) or lease. The cash purchase is the simplest. You pay the system cost up front, you own the system, and you receive all the production from the system. The math is straightforward and the ownership question is settled. There is no federal credit to claim on a purchased system installed in 2026: the 30 percent federal residential clean energy credit (section 25D) ended for systems installed after December 31, 2025 (Public Law 119-21; see the IRS residential clean energy credit page).
The solar loan is the next step. A 20-year solar loan at 6 to 9 percent was typically structured around the assumption that the homeowner would use the 30 percent federal credit as a year-one principal paydown. That credit is not available for homeowner-owned systems installed after December 31, 2025 (Public Law 119-21), so a loan that still assumes a credit-funded paydown can leave you with a higher monthly payment than the sales presentation showed. Ask for the payment schedule with no federal credit applied, and confirm your situation with a tax professional before signing.
The PPA or lease is where the dealer-installer model makes most of its margin. The homeowner pays nothing up front and instead pays a monthly fee for the electricity the system produces, with annual escalators of 1.99 to 2.99 percent baked into the contract. Over 25 years, the escalators compound, and the dealer or third-party owner keeps the SREC value and any state-level incentives. A PPA provider may be able to claim a commercial federal credit under section 48E if the deadlines in Public Law 119-21 are met (construction begun by July 4, 2026, or the system placed in service by December 31, 2027), and any benefit would show up only in the contract rate. With a lease, the leasing company, not you, may claim the commercial section 48E credit if the Public Law 119-21 deadlines (construction begun by July 4, 2026 or placed in service by December 31, 2027) are met, and any benefit shows up only in the lease price. As enacted, the law’s new leasing bar names solar water heating and small wind property, not rooftop panels. The PPA can still make sense for homeowners with no cash to deploy, but the long-run economics favor the dealer. Our breakdown of the contract structure is in solar installation companies vetting.
What 2026 per-watt pricing actually looks like
Residential solar in 2026 ranges from $2.50 to $3.50 per watt installed. A 7 kilowatt system (about 17 to 18 panels at 410W each) lands at $17,500 to $24,500 before incentives. For a homeowner-owned system installed in 2026, there is no federal credit to subtract: the 30 percent 25D credit ended for systems installed after December 31, 2025. State incentives, utility rebates, and the SREC market in your state may still lower the effective cost. The detailed cost model is in solar installation cost 2026.
Pricing below $2.50 per watt usually means cut corners somewhere. The racking may be a discount steel system instead of name-brand IronRidge or Unirac. The inverter may be a string inverter with no panel-level monitoring instead of Enphase microinverters or SolarEdge optimizers. The workmanship warranty may be 1 year instead of 10 or 25. Pricing above $3.50 per watt usually means commission stacking. The dealer markup, the sales rep commission, and the financing finance charge are layered onto a base install cost that the EPC crew is delivering for $1.80 to $2.20 per watt.
Equipment selection: panels, inverters, and racking
Panel brands are compared in our piece on best solar panel brands. The short version: Q CELLS Q.PEAK DUO BLK is the volume default for good reason. REC Alpha Pure-R and SunPower Maxeon 6 are the premium options. Silfab Prime is the US-assembled option, which matters mainly to PPA providers and commercial owners pursuing the section 48E domestic content bonus; homeowner-owned systems have no federal credit to boost after 2025. Ask any installer quoting a brand outside this list who handles warranty claims in the US.
The inverter decision is between microinverters and string inverters. Enphase IQ8 microinverters install one per panel and convert DC to AC at the panel. SolarEdge HD-Wave uses a centralized string inverter with per-panel DC optimizers. Both deliver panel-level monitoring. Microinverters handle shading and panel-level failure more gracefully. String inverters are slightly cheaper. Our detailed comparison is in microinverter vs string inverter.
Racking attaches the array to the roof and has to last as long as the panels. IronRidge and Unirac are common on shingle roofs and S-5! clamps on standing-seam metal. Ask for the racking brand and model in writing; discount racking that flexes in wind or corrodes in coastal salt air can become a repair within 10 years. For installations on metal roofs, the racking choice is different than asphalt and the breakdown is in solar panels on metal roof.
The federal solar tax credit after 2025
The 30 percent federal residential clean energy credit (section 25D), which covered homeowner-owned solar including panels, inverter, racking, labor, and battery storage, ended for expenditures made after December 31, 2025. Public Law 119-21 (signed July 4, 2025, section 70506) replaced the old schedule, which had held 30 percent through 2032 before stepping down. IRS guidance (FS-2025-05) treats the expenditure as made when installation is completed, so a system installed in 2026 does not qualify even if it was paid for in 2025. Systems installed by December 31, 2025 are claimed on Form 5695 for the year of installation; the credit is non-refundable, and unused credit can carry forward.
PPAs are different. The company that owns a PPA system may be able to claim a commercial credit under section 48E if construction began by July 4, 2026 or the system is placed in service by December 31, 2027 (Public Law 119-21, section 70513), subject to foreign-entity restrictions in the same law; any benefit would show up only in the contract rate. Leases work the same way: the leasing company may claim section 48E under those deadlines. As enacted, the law’s new leasing bar names solar water heating and small wind property, not rooftop panels, though Congress could still clarify that. The 48E domestic content bonus remains for owners who do qualify; it is a project-level test, with a US-manufactured content threshold of 50 percent for projects that begin construction in 2026 and 55 percent after 2026. The current status is in solar roof tax credit 2026. Check current IRS guidance and a tax professional before relying on any federal credit.
Warranty structure: panel, inverter, workmanship
A residential solar system in 2026 carries three warranty layers. The panel warranty from the manufacturer runs 25 years on product, with a separate 25-to-40-year performance warranty guaranteeing minimum production output (typically 86 to 92 percent at year 25). The inverter warranty runs 10 to 25 years depending on manufacturer (Enphase IQ8 is 25 years standard, SolarEdge is 12 years standard with 25-year extension available). The workmanship warranty from the installer covers labor on warranty repairs and ranges from 1 year (the dealer minimum) to 25 years (the integrated regional installer best practice).
The workmanship warranty is the warranty that matters most over time. Panel failures are rare and the manufacturer handles the panel cost. The labor to remove the failed panel, identify the replacement, and reinstall is the real cost, and that is what the workmanship warranty covers. A 1-year workmanship warranty leaves the homeowner with the labor bill for the next 24 years. A 25-year workmanship warranty matches the panel warranty term. Insist on the longer term and verify the installer has the company longevity to honor it.
Monitoring and post-installation support
Every solar system in 2026 should include panel-level monitoring through the Enphase Enlighten platform or the SolarEdge mySolarEdge platform. The homeowner sees production data per panel, alerts on panel-level failures, and historical performance trends. Most dealer-installers provide monitoring for the first year and then expect the homeowner to manage their own monitoring after that. The integrated regional installers typically include ongoing monitoring as part of a 10-or-25-year service contract.
Ask every installer who watches the production data after year 1 and how the homeowner is alerted when a panel underperforms. Acceptable: the installer’s service team monitors the system and calls when a panel-level alert fires. Not acceptable: monitoring is the homeowner’s job and the installer responds only to tickets.
The 2026 net metering landscape
Net metering is the utility-side policy that determines how the homeowner is credited for excess solar production exported to the grid. California’s net billing tariff (NEM 3.0) applies to customers who submitted an interconnection application on or after April 15, 2023, per the California Public Utilities Commission, and reduced export compensation enough to push the economics toward solar-plus-storage rather than solar-only. Massachusetts, New York, New Jersey, and several other states maintain full retail net metering for now, but the policy direction across the country is toward reduced export credit and increased time-of-use rate structures. Our detailed coverage is in net metering explained 2026.
The right installer for your market knows the local utility’s net metering policy in detail and designs the system size to optimize against it. Under NEM 3.0 export rates, size the array closer to daytime self-consumption; under full retail net metering, a larger array can pay. Ask the installer to model your utility’s current tariff and show the assumptions.
Solar plus storage: when batteries make sense
Adding battery storage to a solar system runs $10,000 to $20,000 installed for a Tesla Powerwall 3, Enphase IQ Battery 5P, or Franklin aPower 2. The battery makes economic sense in markets with NEM 3.0 export rates that disincentivize grid export, in markets with high time-of-use rate spreads where the homeowner can charge the battery on cheap off-peak power and discharge during peak hours, or for homeowners with backup power requirements where grid outages are routine.
The dealer-installer push toward solar-plus-storage in 2026 is partly economic (battery margin is higher than panel margin) and partly policy-driven (NEM 3.0 changed the math in California). If your installer is pushing storage in a market with full retail net metering and infrequent outages, the economics may not pencil. Run the math before signing.
Comparing companies on the same job
The right way to compare solar installers is to get three written quotes on the same system size, the same panel and inverter brand, the same warranty terms, and the same financing structure. Most homeowners get three quotes that differ on all four dimensions and then try to compare. The dealer who quoted a PPA with Q CELLS panels is not comparable to the EPC who quoted cash purchase with REC Alpha. Force the apples-to-apples by asking each installer to quote the same equipment and financing terms. Our deep dive on comparing the top installers is in solar install companies comparison and the quote-request framework is in solar system quotes.
Watching for the door-knocker scam
If a solar sales rep showed up at your door this month, you are talking to a 1099 dealer rep, not an installer. The door-knocker is incentivized to close the contract and move on. The follow-up work (design, permitting, install, service) lands on someone else. The dealer-installer model is not inherently fraudulent, but the high-pressure same-day-close sales tactics are correlated with PPA contracts that lock the homeowner into 20-25 year escalators. Do not sign on the first visit. A contract signed at your home is a door-to-door sale under the FTC Cooling-Off Rule, which requires written notice that you may cancel until midnight of the third business day (16 CFR 429.1). Get two additional quotes before committing. Our piece on roofing scams covers the broader pattern of high-pressure sales tactics, and many of the same patterns apply to solar.
The installer-and-roof question
Your solar system installs on your roof, and the roof has to outlast the system or you are paying to detach and reset the array when the roof fails. If your roof is more than 10 years into its service life, replace it before going solar. Our broader coverage on roof-and-solar interaction is in our piece on the broader solar service category at solar panel installation services, and the types of solar systems available is covered in types of solar energy. Roof warranty implications of solar installation are addressed in solar roof warranty 2026.
Decision table: which installer model fits
| If you | Then |
|---|---|
| Want one point of contact from sale to year-11 service | Regional integrated installer with a written 10 to 25 year workmanship warranty |
| Can handle equipment, financing and interconnection paperwork yourself | Go direct to an EPC and ask for the 10 to 25 percent dealer-markup saving |
| Were quoted under $2.50 per watt | Ask for the racking, inverter and workmanship warranty in writing |
| Were quoted over $3.50 per watt | Ask for the dealer markup, commission and finance charge itemized |
| Have a roof more than 10 years into its service life | Replace the roof before going solar |
| Signed at your door | Cancel in writing by midnight of the third business day if you change your mind |
The bottom line
The right solar system installer in 2026 is the company that designs for your specific roof and your specific utility’s net metering policy, holds state contractor licensing and NABCEP certification on the actual lead installer for your project, provides panel-level monitoring as a multi-year service rather than a year-one add-on, delivers a 10-to-25-year workmanship warranty matching the panel and inverter warranties, and prices the system between $2.50 and $3.50 per watt installed. Get three written quotes on matching specs. Verify the licensing and certifications. Read the financing contract before signing. Match the installer to your situation, whether that is a national dealer, a regional integrated installer, or a direct EPC engagement. The system is on your roof for 25 years. The installer relationship should be designed to last at least as long.