The Average Is Already a Range
EnergySage’s cost data lists the average residential system at roughly $2.58 to $2.95 per watt before incentives in early 2026. Notice what that already says: the average, the number people treat as the answer, comes with a spread attached. Individual quotes scatter around it depending on the home, the equipment, the installer, and how the deal is financed.
Per watt is the right yardstick, and also an incomplete one. It lets a homeowner compare a small system with a large one, but it says nothing about production, warranty, roof work, or who stands behind the paperwork if the installer disappears. A cheaper per-watt quote that leaves out a panel upgrade can end up costing more than a pricier one that included it. Our glossary entry on price per watt covers the basics.
What Soft Costs Are, and Why They Differ
Hardware is the part you can photograph: panels, inverters, racking, wiring. Soft costs are everything it takes to put that hardware on your roof and make it legal: finding and selling the customer, designing the system, permits and inspections, utility interconnection paperwork, financing costs, and the installer’s overhead and margin. Two companies can buy identical panels and arrive at very different prices because they run very different businesses.
The business model moves the number. A company that sells door to door carries different acquisition costs than one living on referrals. An installer with its own crews prices differently from one that subcontracts. A dealer network with several layers of commission has more mouths to feed in the same quote. None of that makes a quote wrong. It does mean a low quote and a high quote can both be fair, and the homeowner’s job is to find out what each one includes.
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Book a Solar CallHardware, Roof, and Electrical Details That Move the Price
Panel efficiency tiers, inverter type, roof pitch and material, shade, a main electrical panel that needs upgrading, a ground mount that needs trenching, a battery added to the design: any of these can change the bottom line by a lot. System size matters too, because fixed costs are spread over fewer watts on a small system, which lifts the price per watt. Quotes for different system sizes shouldn’t be ranked by per-watt price alone.
Ask every installer for the production estimate behind the quote and the shading and orientation assumptions inside it. Two quotes at the same price per watt can promise different annual output because one assumed a cleaner roof than the other. If the numbers disagree, the estimate with the more careful shade analysis usually deserves more trust than the more optimistic one.
Financing Is the Hidden Variable
A cash price, a loan price, and a lease or PPA payment aren’t the same kind of number. Loan-financed quotes often carry lender fees built into the loan, so the price of an identical system can differ by payment method; our dealer fee statistics page explains the mechanism. Lease and PPA offers have no purchase price at all, just a payment stream (a monthly lease payment or a per-kilowatt-hour rate) and usually an escalator, so they can’t be compared per watt without converting everything to total cost over the same number of years.
Federal incentives changed the comparison in 2026. Per SEIA’s summary of the One Big Beautiful Bill Act, Section 25D ended for systems installed on or after January 1, 2026, so an owned system gets no homeowner credit, while third-party owners retain 48E access and may reflect it in their pricing. A quote that subtracts a federal credit from an owned system is out of date. A lease quote that looks cheap deserves scrutiny from the other direction: read the escalator and the transfer terms before deciding it is cheap.
How to Compare Quotes, and What Installers Should Do About It
Compare like with like. Same system size, same equipment tier, same production assumptions, same financing path, same warranty terms, and the same list of inclusions and exclusions, in writing. Then compare total cost over a period you actually care about, such as the years you expect to stay in the house. If one quote can’t be lined up against the others, ask the installer to restate it so it can.
Installers should put that breakdown on the table before the homeowner asks, because a household that understands the spread tends to sign with fewer second thoughts. VA Horizon’s solar appointment setting books exclusive, double-confirmed appointments, so your closers spend visits comparing quotes instead of chasing no-shows, which are replaced, never billed.
Sources
The external data in this article draws on the sources below. Figures described in the text as estimates or industry triangulations are directional and are not attributed to a single dataset.
- EnergySage, solar panel cost data
- SEIA, Q2 2026 Solar Market Insight Report
- SEIA, clean energy provisions of the OBBBA