The six lines that decide a solar quote (updated for 2026)
To read a solar quote, judge it on six lines: the total price and the price per watt, the system size in kW with the exact panel, inverter, and battery models, the year-one production estimate and how it was calculated, the equipment and workmanship warranties, and the financing terms. The single most useful move is to compare quotes on price per watt, not on sticker price.
- Price per watt is the apples-to-apples number. Divide the gross cash price by the system size in watts. A fair 2026 range runs from about $2.58 per watt (EnergySage marketplace quoted average) to a national median near $3.50 per watt for cash-purchased systems (EnergySage, as of June 2026; Lawrence Berkeley National Laboratory, 2024 installs, published October 2025).
- System size and equipment set the value. Look for the panel wattage (about 400 to 500 W residential), efficiency, an annual degradation rate near 0.5% or lower, the inverter type, and any battery’s kWh and kW rating, plus four separate warranties (NREL, as of 2026; EnergySage, as of 2026).
- Sanity-check the production estimate. Run your address through NREL’s free PVWatts model. Realistic U.S. rooftop output is roughly 1,400 to 1,700 kWh per kW of panels per year; a quote promising more without a reason is inflated (NREL PVWatts, as of 2026).
- Financing is where the price hides. A solar loan’s buried dealer fee can add 10% to 30% to the price. The CFPB’s own example turns a $30,000 cash system into a $39,000 loan. Leases and PPAs often carry a 1% to 3% annual payment escalator (CFPB, August 2024; EnergySage, as of 2026).
- Any 30% federal tax credit line on a 2026 quote is wrong. The residential Section 25D credit ended for expenditures made after December 31, 2025, so a quote that still leans on it overstates your savings (IRS, as of 2026).
The numbers that anchor a fair quote (2026)
- $2.58 per watt EnergySage marketplace quoted average, before incentives (EnergySage, as of June 2026); a $3.50 per watt national median for cash-purchased systems installed in 2024 (Lawrence Berkeley National Laboratory, published October 2025).
- $4.70 per watt median for loan-financed systems in that same 2024 dataset, about 34% higher than cash, because dealer fees ride inside the price (Lawrence Berkeley National Laboratory, October 2025).
- 1,400 to 1,700 kWh per kW per year realistic U.S. rooftop production range to check any estimate against (NREL PVWatts methodology, as of 2026).
- 1% to 3% per year typical lease or PPA payment escalator; at 2.9% the payment roughly doubles over 25 years (EnergySage, as of 2026).
- December 31, 2025 the date the 30% federal residential solar tax credit (Section 25D) ended (IRS, as of 2026).
What actually matters on a solar quote, and what is just decoration
A solar quote is a sales document, so the design is built to make the monthly payment look small and the savings look huge. Your job as the buyer is to ignore the artwork and read the six lines that actually determine what you pay and what you get: the total price, the price per watt, the system size and equipment, the production estimate, the warranties, and the financing terms. Everything else on the page, the stock photos of a happy family, the “you could save $50,000” banner, the countdown to a discount, is there to move you, not to inform you.
The quotes that look cheapest up front are often the most expensive once you read them. Two proposals for the same roof can differ by thousands of dollars for reasons that never appear on the front page: a financed price padded with a hidden dealer fee, an optimistic production estimate that inflates the promised savings, a headline warranty that turns out to cover only defects and not output, or an escalator clause that quietly raises a lease payment every year. This guide walks each of those six lines in the order they matter, and gives you a checklist you can hold any quote to. For the wider picture on system pricing, see our guide to how much solar panels cost, part of our solar cost and savings guide.
Price per watt: the one number that lets you compare two quotes fairly
Price per watt is the great equalizer, because it strips a quote down to what you actually pay for capacity. You calculate it by dividing the gross cash price by the system size in watts: a $21,000 system rated at 7,000 watts (7 kW) works out to $3.00 per watt. Because a bigger system naturally costs more in total, the sticker price tells you almost nothing on its own. Price per watt lets you line up a 6 kW quote against an 8 kW quote and see which one is genuinely priced better (EnergySage, as of June 2026).
Use the gross price before any incentives, because that is the only figure every quote shares. Some proposals show you a “net” price that already subtracts incentives or an assumed tax credit, which makes the number look smaller and is not comparable across companies. Always find the gross cash price first, then compute price per watt from it. Below is what a fair range looks like in 2026, from two independent datasets. They measure different things, so read them as two reference points, not one blended number.
| Benchmark | Price per watt | What it measures | As of |
|---|---|---|---|
| EnergySage marketplace average | about $2.58 per watt | Quoted price from competing installers, before incentives | June 2026 |
| LBNL national median, cash purchase | about $3.50 per watt | Actual installed price of cash-bought systems | 2024 installs, published Oct 2025 |
| LBNL national median, loan financed | about $4.70 per watt | Actual installed price of loan-financed systems | 2024 installs, published Oct 2025 |
Sources: EnergySage quoted-price data (June 2026) and Lawrence Berkeley National Laboratory, Tracking the Sun / Distributed Solar and Storage 2025 Data Update (installs through 2024, published October 2025). EnergySage strips out excess sales cost, which is one reason its quoted average sits below LBNL’s installed median. The cash-versus-loan gap is the dealer fee at work, covered below.
Here is how the same-size system reads at three price points, so the number stops being abstract. The table below holds the system at 7 kW (7,000 watts) and simply divides each quoted total by that wattage. It is our own illustration to show the pattern, not a quote for your roof.
| Quoted total (7 kW system) | Price per watt | How it reads in 2026 |
|---|---|---|
| $18,900 | $2.70 per watt | Competitive, near the low end of fair |
| $22,400 | $3.20 per watt | Middle of the road, worth comparing on equipment |
| $28,000 | $4.00 per watt | High; ask what justifies it or look for a hidden finance fee |
SolarFY estimate, illustrative only. Price per watt = quoted total divided by 7,000 watts. Real systems vary by size, equipment, roof, and region, so use this to see the pattern, not as a price for your home. Fair-range inputs from EnergySage and LBNL (2026).
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System size and equipment: what the kW number and the spec lines really tell you
The system size in kilowatts is the headline capacity, and the equipment lines tell you how good that capacity actually is. System size (for example 7 kW) is the sum of the panel wattages, and it drives both the price and the production estimate. But two 7 kW systems are not equal. What separates them sits in the spec lines: the panel make, model, and wattage, its efficiency and annual degradation rate, the inverter type, and, if a battery is included, its usable kWh and its kW power rating. A quote that will not name the exact equipment is hiding something (EnergySage, as of 2026).
The four warranties are four different promises, and a headline “25-year warranty” can mean any one of them. A well-built residential system carries a panel product warranty, a panel performance warranty, a workmanship or installation warranty, and an inverter warranty, each with its own term. The performance warranty is the one that guarantees output over time, and it is the one weak quotes blur into a single big number. NREL field data puts median panel degradation near 0.5% per year for crystalline silicon, so a good performance warranty still guarantees roughly 85% or more of rated output at year 25 (NREL, as of 2026).
| Warranty on the quote | What it actually promises | Good in 2026 |
|---|---|---|
| Panel product (defect) | The panel is free of manufacturing defects | 15 to 25 years |
| Panel performance (output) | The panel still makes a stated share of rated power over time | 25 years, 85% or more retained at year 25 |
| Workmanship / installation | The installer’s labor, roof penetrations, and wiring | 10 years or more |
| Inverter | The inverter hardware | 10 to 25 years, longer for microinverters |
Typical U.S. residential terms as of 2026; exact coverage varies by brand and installer, so read each certificate. Sources: EnergySage and NREL degradation data. For how to weigh the panel specs themselves, see our guide to choosing solar panels.
Good to know: A 25-year performance warranty is only as good as the manufacturer standing behind it in year 20. That is a fair reason to favor an established maker, but it is a stability check, not a reason to accept a vague spec line. Get the exact panel and inverter model numbers in writing so you can read their real spec sheets before you sign.
How do you sanity-check a solar quote’s production estimate?
Sanity-check the production estimate by running your own address through NREL’s free PVWatts calculator and comparing. The estimate, usually shown as year-one kWh, is what every savings claim on the quote is built on, so an inflated estimate inflates the promised savings. PVWatts is the federal government’s own production model, it is free, and it lets you enter your ZIP, roof tilt, and direction to get an independent number (NREL PVWatts, as of 2026). If the installer’s estimate is far above what PVWatts gives for a similar system, ask them to explain the gap.
Know the realistic yield range so you can spot an estimate that is too good. Across the United States, a rooftop system produces roughly 1,400 to 1,700 kWh per kW of panels per year, with about 1,500 kWh per kW a common national benchmark, varying with sun, tilt, and shading (NREL PVWatts, as of 2026). PVWatts applies a default system-loss stack of about 14% to account for shading, soiling, wiring, inverter conversion, and more. A quote that quietly assumes almost no losses, or ignores the roughly 0.5% per year the panels degrade, will promise more electricity than the system delivers.
| Year-one estimate on a 7 kW system | Specific yield (kWh per kW) | How to read it |
|---|---|---|
| about 9,800 kWh | 1,400 per kW | Conservative, common in cloudier or shaded sites |
| about 10,500 kWh | 1,500 per kW | Realistic national benchmark |
| about 11,900 kWh | 1,700 per kW | Realistic only in very sunny, well-oriented sites |
| about 13,300 kWh | 1,900 per kW | Suspect; ask what justifies it or suspect an inflated estimate |
SolarFY estimate, illustrative only. Specific yield = year-one kWh divided by system size in kW. Realistic-range inputs from NREL PVWatts (2026). Your real number depends on your ZIP, roof, and shading, so run PVWatts for your address rather than trusting a round figure.
Cash, loan, lease, or PPA: how to read the financing on a solar quote
How you pay changes the true price more than almost any other line on the quote, and the differences are easy to miss. The same physical system can be a cash purchase, a loan, a lease, or a power purchase agreement (PPA), and each is priced and disclosed differently. Cash is the simplest and usually the cheapest per watt. A loan lets you own the system with no money down but often carries a hidden fee. A lease or PPA is “no up-front cost” where you qualify, but you do not own the system and the payment can climb every year. For a deeper comparison, see our guides to solar loan vs lease vs cash and solar lease vs PPA.
The loan dealer fee is the most expensive thing most buyers never see. To offer a low advertised interest rate, many solar lenders bake a fee into the amount you finance, labeled a dealer fee, platform fee, or original issue discount. The Consumer Financial Protection Bureau found these fees are often not disclosed as a separate line and typically run 10% to 30% of the cash price, with some products higher. In the CFPB’s own worked example, a system with a $30,000 cash price carries a $9,000 hidden fee, so you sign a $39,000 loan while the installer still only receives $30,000 (CFPB, August 2024). The defense is simple: ask for the cash price and the financed amount, both in writing. The gap is the fee.
Watch for this: A very low advertised APR (for example 0.99% or 2.99%) on a solar loan is usually paid for by a larger dealer fee inside the price. A higher-rate loan with no dealer fee can cost less overall. Compare the total amount financed and the total of all payments, not just the interest rate.
On a lease or PPA, the escalator clause is the line that quietly erases your savings. Most leases and PPAs raise your payment by a fixed percentage every year, commonly 1% to 3%, sometimes up to 3.9% (EnergySage, as of 2026). That compounds. A payment that starts at $150 a month with a 2.9% escalator grows to about $257 by year 25, roughly double, and your savings only hold up if your utility’s rates rise faster than the escalator. The table below shows the neutral trade-offs; there is no single winner, because the right choice depends on whether owning the system and its incentives matters to you.
| How you pay | Up-front cost | Who owns it | The line to scrutinize |
|---|---|---|---|
| Cash | Full price | You | Price per watt versus the fair range |
| Loan | Often $0 down | You (lender has a lien) | The hidden dealer fee and the total amount financed |
| Lease | $0 up front where eligible | The provider | The annual escalator and the buy-out and transfer terms |
| PPA | $0 up front where eligible | The provider | The per-kWh rate and its annual escalator |
Neutral comparison of standard 2026 structures. “No up-front cost” refers to qualifying lease or PPA financing where eligible; these agreements typically run 20 to 25 years and total payments may exceed a cash purchase. Escalator data: EnergySage (2026). Solar panels are not free.
| Lease or PPA payment at a 2.9% escalator | Monthly payment | Increase vs year 1 |
|---|---|---|
| Year 1 | $150 | baseline |
| Year 10 | about $194 | +29% |
| Year 20 | about $258 | +72% |
| Year 25 | about $298 | +99% |
SolarFY estimate, illustrative only. Payment in year N = $150 times 1.029 raised to the power of (N minus 1). Uses a $150 year-one payment purely to show how a 2.9% escalator compounds; your contract’s starting payment and escalator rate will differ, so read the exact figures on your agreement. Escalator range: EnergySage (2026).
The tax-credit trap: older quotes still show a “30% federal credit” line that is gone
The federal residential solar tax credit (Section 25D) ended for expenditures made after December 31, 2025, so most homeowners buying in 2026 cannot claim it. This matters when you read a quote because many proposals, and the sales pitches around them, were written when the 30% credit was still law and still show a line that subtracts 30% from your price or your payback math (IRS, as of 2026; IRS OBBBA FAQ, as of 2026). A quote that still relies on that credit overstates your savings, sometimes by thousands of dollars.
Treat any “buy now to lock in the 30% credit” line as a red flag, not an incentive. The One Big Beautiful Bill Act (Public Law 119-21) accelerated the credit’s old 2034 sunset to the end of 2025, and an expenditure counts when installation is complete, so a system finished in 2026 does not qualify even if you signed in 2025. A separate commercial credit (Section 48E) can apply to third-party-owned lease or PPA systems, but the provider claims it, not you, and it is not a homeowner tax credit. State and utility incentives, net metering, and no-up-front-cost lease or PPA financing where eligible can still improve the math. MySolarFY does not provide tax advice; confirm your situation with a tax professional. For the full picture, see what changed with the federal solar tax credit.
The SolarFY solar quote checklist: line item, what good looks like, and the red flag
This is the scorecard we built so you can hold any quote to the same standard, line by line. Run each proposal through the rows below. Every “what good looks like” figure is a published number or a documented practice you can verify, so none of it requires trusting a sales pitch. If a quote cannot fill in a row, that blank is itself information.
| Line item on the quote | What good looks like in 2026 | Red flag |
|---|---|---|
| Gross cash price | Stated clearly, before any incentives | Only a “net” or “after-credit” price is shown |
| Price per watt | Roughly $2.58 to $3.50 per watt for cash (compare on this) | Well above the fair range with no explanation, or not computable |
| System size (kW) | Matches your usage; sum of named panels | Oversized to inflate savings, or vague |
| Panel make, model, wattage | Exact model named; efficiency and degradation on the spec sheet | “Premium panels” with no model number |
| Inverter and battery | Named model; battery kWh and kW stated | Type or capacity left blank |
| Year-one production (kWh) | Near a PVWatts check; about 1,400 to 1,700 kWh per kW | Implies a specific yield well above 1,700 with no reason |
| Warranties | Four listed: product, performance, workmanship, inverter | One headline “25-year” number covering everything |
| Financing terms | Cash price and amount financed both shown | Only a monthly payment; dealer fee not disclosed |
| Lease or PPA escalator | Rate stated; you can see the year-25 payment | Escalator buried or unstated |
| Federal tax credit line | No 30% federal credit assumed for a 2026 install | A 30% Section 25D credit still applied to your price |
SolarFY checklist, compiled from EnergySage, LBNL, CFPB, NREL, and IRS guidance (as of 2026). The 30% federal residential Section 25D credit ended for expenditures made after December 31, 2025, so no 2026 quote should assume it. Use this as a screening tool, not a substitute for reading the full contract.
Red flags: when to slow down before you sign
The strongest signal in solar sales is pressure, because a genuinely good deal survives a night of sleep and a second quote. The U.S. Department of Energy’s Homeowner’s Guide to Solar tells buyers plainly not to give in to pushy sales tactics and to talk to certified installers before deciding (U.S. Department of Energy, as of 2026). Federal consumer agencies have issued repeated alerts about solar-specific scams, so the warning signs below are worth taking seriously.
- Same-day signing or a “today only” discount. High-pressure, act-now tactics are the number-one warning sign regulators name (DOE, as of 2026).
- Guaranteed or inflated savings. Promises like “never pay an electric bill again” or “the government pays for it” are classic solar-scam lines (FTC, September 2024).
- A misrepresented tax credit or fake government affiliation. No one is offering free, government-funded solar, and the 30% federal credit ended after 2025 (Treasury, CFPB, and FTC advisory, August 2024).
- A hidden dealer fee inflating a financed price. If the amount financed is well above the cash price, an undisclosed fee is likely riding inside it (CFPB, August 2024).
- Vague equipment or an unlicensed installer. A refusal to name the exact panel and inverter models, or to show licensing and certification, is a reason to pause (DOE, as of 2026).
- No written production guarantee and a large deposit. Watch for a big up-front deposit paired with only a verbal promise about output; get the production guarantee in writing (FTC, August 2024).
None of this means solar is a bad deal, only that a quote deserves the same scrutiny as any major purchase. The way to answer the market is not to trust one salesperson but to compare. Getting more than one quote is the single best defense, and comparing installers on objective criteria, licensing, warranties, reviews, and price per watt, beats reacting to a pitch. See our neutral guides to how to compare solar installers, national vs local solar companies, and the questions to ask a solar installer.
Questions to ask before you sign a solar quote
Bring this short list to any sales conversation; the answers, or the dodges, tell you most of what you need.
- What is the gross cash price, and what is the price per watt on this system?
- What is the exact panel make, model, and wattage, and the inverter and battery models?
- How did you calculate the year-one production estimate, and does it match PVWatts for my address?
- Which four warranties apply, for how many years each, and what output does the performance warranty guarantee at year 25?
- If this is a loan, what is the cash price versus the amount I finance, and what is the dealer fee?
- If this is a lease or PPA, what is the annual escalator, and what will my payment be in year 25?
- Does this quote assume the 30% federal tax credit that ended on December 31, 2025, and if so, on what basis for a 2026 install?
- Will you put the production estimate and the equipment specs in writing before I pay a deposit?
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Frequently asked questions
How do you read a solar quote? Read it on six lines and ignore the marketing. Check the gross cash price and the price per watt (gross price divided by system watts, a fair 2026 range of about $2.58 to $3.50 per watt for cash), the system size in kW with the exact panel, inverter, and battery models, the year-one production estimate (sanity-checked against NREL’s free PVWatts calculator), the four warranties, and the financing terms (EnergySage, as of 2026; NREL PVWatts, as of 2026). Compare competing quotes on price per watt, and always get the equipment specs and production estimate in writing before you pay a deposit.
What is a good price per watt for solar in 2026? For a cash purchase, roughly $2.58 to $3.50 per watt is a fair range, with EnergySage’s marketplace quoted average near $2.58 per watt and Lawrence Berkeley National Laboratory’s national median for cash-bought systems near $3.50 per watt (EnergySage, June 2026; LBNL, 2024 installs). Loan-financed systems ran a median near $4.70 per watt in the same dataset because dealer fees ride inside the price. Compute price per watt from the gross price before incentives, since that is the only figure every quote shares, and treat a number well above the range as something to question.
Is a solar quote legitimate, or is it a scam? Most quotes are legitimate, but the pressure around them is the tell. Federal agencies warn that same-day signing, guaranteed savings, a misrepresented tax credit, and undisclosed financing fees are the common red flags (FTC, September 2024; CFPB, August 2024). A legitimate quote names the exact equipment, shows the cash price and the amount financed, explains how the production estimate was calculated, and survives you taking it home to compare against a second quote. Refusal to do any of those is a reason to slow down.
How big a deposit should a solar quote ask for? Treat a large up-front deposit as a caution sign. Federal consumer guidance warns homeowners to be wary of paying substantial money before work is done (FTC, August 2024), and some states legally cap home-improvement down payments low, for example California limits them to 10% of the price or $1,000, whichever is less (California Contractors State License Board, as of 2026). As a common guideline, many advisors suggest keeping any deposit to a small share of the total. Before you pay, get the equipment specs and the production estimate in writing, confirm the installer’s license and certification, and make sure the contract says what happens to your deposit if the project falls through.
How do I check if a solar production estimate is realistic? Run your address through NREL’s free PVWatts calculator and compare its year-one kWh to the installer’s number (NREL PVWatts, as of 2026). A U.S. rooftop system typically produces about 1,400 to 1,700 kWh per kW of panels per year, so divide the quote’s estimate by the system size in kW to get its specific yield and see where it lands. PVWatts also applies about 14% in default system losses for shading, soiling, and wiring. If the quote implies a yield well above 1,700 per kW, or ignores the roughly 0.5% per year the panels degrade, the estimate, and the savings built on it, are likely inflated.
Why is a 30% federal tax credit on my 2026 quote a red flag? Because that credit is gone. The federal residential solar tax credit (Section 25D) ended for expenditures made after December 31, 2025, so a system placed in service in 2026 does not qualify, even if the quote still shows a 30% credit line (IRS, as of 2026). A quote that subtracts that credit from your price or payback overstates your savings. State and utility incentives, net metering, and no-up-front-cost lease or PPA financing where eligible may still help. A separate commercial credit (Section 48E) can apply to a leased or PPA system, but the provider claims it, not you. MySolarFY does not provide tax advice; consult a tax professional.
What is a dealer fee on a solar loan? A dealer fee is a charge a solar lender bakes into the amount you finance in exchange for offering a low advertised interest rate. The CFPB found these fees, sometimes labeled a platform fee or original issue discount, are often not disclosed separately and typically run 10% to 30% of the cash price; in the CFPB’s example a $30,000 cash system becomes a $39,000 loan (CFPB, August 2024). To catch it, ask for the cash price and the amount financed in writing. A very low APR paired with a large gap between the two is the fee at work, and a higher-rate loan without one can cost less overall.
Reviewed by the SolarFY Editor, last reviewed July 2026. The price-per-watt, financing, production, warranty, and tax-credit figures on this page were verified against EnergySage, Lawrence Berkeley National Laboratory, the Consumer Financial Protection Bureau, NREL, the U.S. Department of Energy, the FTC, and the IRS as of July 2026; prices, incentives, financing terms, and rules change, so confirm current details before you sign. Learn more about our data and methodology.
MySolarFY is a free service that matches homeowners with licensed solar installers. We are not an installer, financing company, tax advisor, or government program, and we do not provide tax or financial advice. This page is neutral educational guidance and does not rank, endorse, or recommend any specific installer, lender, or product. The federal residential solar tax credit (Section 25D) ended for expenditures made after December 31, 2025, and most homeowners who install in 2026 cannot claim it, so confirm your tax situation with a professional. “No up-front cost” refers to qualifying lease or PPA financing where eligible; these agreements typically run 20 to 25 years, may include an annual escalator, and total payments may exceed the cost of a cash purchase. Solar panels are not free and monthly payments apply. Prices, incentives, savings, and financing terms vary, change over time, and are not guaranteed. See our full disclaimer.
