Data approachEIA rates · NREL sun hours · 2026 federal policy · methodology
In 2026, solar panels cost about $2.60 per watt installed before incentives, according to EnergySage marketplace data, which works out to roughly $31,135 for a typical 12 kW home system. Broader installed-price data tells a higher story: Lawrence Berkeley National Laboratory (LBNL) reported a 2024 median price of $3.50 per watt for cash purchases. The gap exists because marketplace quotes reflect competing bids, while LBNL tracks prices from a much wider set of installations.
One more change matters for every quote you’ll see this year: the 30% federal tax credit for homeowners (Section 25D) no longer applies to systems completed after December 31, 2025. That means your net cost per watt is now much closer to the sticker price, and state and local incentives carry more weight.
Price per watt is still the best apples-to-apples way to compare quotes. A $18,000 bid for a 6 kW system is $3.00/W. A $19,800 bid for 7.5 kW is $2.64/W, which is a better deal for more capacity. Comparing dollar totals instead of price per watt is how overpriced quotes slip through.
Last reviewed October 2, 2026. Prices are drawn from the sources listed at the end of this guide; always verify against current quotes for your address.
⚡ System Size
What Drives the Solar Panel Price Per Watt
Panels are a smaller part of the bill than most people expect. In EnergySage’s breakdown of a $31,135 12 kW system, solar panels are about 12% of total cost ($3,736). Inverters are about 10%, wiring about 9%, and permitting and interconnection about 8%. The biggest line items are on the installer side: sales and marketing (about 18%), overhead (about 11%) and profit (about 11%). EnergySage notes that its percentage breakdown draws on a 2021 study from the National Laboratory of the Rockies (formerly NREL), so treat the split as a guide rather than an exact figure.
Data visualization
Sales, marketing, overhead and profit total $12,454 of a $31,135 12 kW system, versus $3,736 for panels. Orange bars are installer business costs; blue bars are equipment, labor and permitting. Source: EnergySage cost breakdown, updated June 30, 2026 (percentages based on a 2021 NREL study).
Chart summary: Panels are the second-largest single line item at $3,736 (about 12%), behind sales and marketing at $5,604 (about 18%). Installer overhead and profit add $3,425 each (about 11% each), so business costs outweigh the panels themselves. This is why two quotes with identical equipment can differ by thousands of dollars, and why comparing itemized price per watt is worth the effort.
System size has the clearest effect on price per watt. Installers spread fixed costs over more capacity on larger systems, so the per-watt price falls as the system grows.
Data visualization
Average solar cost per watt falls from $2.89 at 4 kW to $2.47 at 15 kW. Source: EnergySage Marketplace data, updated June 30, 2026.
Chart summary: A 4 kW system averages $2.89/W ($11,560 total), while a 15 kW system averages $2.47/W ($37,050 total). Most of the drop happens between 4 kW and 7 kW; from 8 kW to 14 kW the price stays in a narrow $2.52–$2.62 band. A smaller system can have a higher price per watt and still be the right choice if it matches your usage, so always judge price per watt alongside total cost and expected savings.
Equipment choices also move the number. String inverters cost less and work well on simple, unshaded roofs. Microinverters or power optimizers cost more but are usually worth it on shaded roofs or roofs with several planes, according to EnergySage. If a salesperson insists on premium equipment for a simple, unshaded roof, ask why.
Site conditions add cost that a per-watt figure can hide. EnergySage notes that multi-plane roofs, dormers and skylights require more equipment and labor, and that an electrical panel under 200 amps may need an upgrade that adds a few thousand dollars. An older roof may need replacing first; EnergySage generally recommends replacing an asphalt roof that is more than 5 to 10 years old before installing solar.
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💰 System Cost
Average Solar Cost Per Watt by State
State averages vary widely because of installer competition, permitting, labor costs and system size. EnergySage’s data shows a general pattern of lower per-watt prices in warmer states and higher prices in colder ones, though there are outliers. Because warm states often need larger systems, total system cost can end up similar even when price per watt differs.
Data visualization
Florida averages $2.12/W while Alabama averages $3.82/W. Blue bars are at or below the EnergySage U.S. average of about $2.60/W; orange bars are above it. Source: EnergySage Marketplace data, state table updated September 25, 2026.
Chart summary: Among the states shown, Florida ($2.12/W), Texas ($2.25/W) and Arizona ($2.27/W) have the lowest average quotes, all below the national average of about $2.60/W. California ($2.52/W) and North Carolina ($2.44/W) also sit below it, while Colorado ($2.64/W), New York ($2.75/W) and Massachusetts ($2.90/W) are above. Hawaii ($3.43/W), Tennessee ($3.51/W) and Alabama ($3.82/W) are the highest of the states charted. EnergySage’s state figures can be noisy where marketplace quote volume is small, so use them as a benchmark and not as a guarantee.
State
Avg. $/W
Avg. system cost*
Florida
$2.12
$34,389
Texas
$2.25
$29,250
Arizona
$2.27
$30,499
North Carolina
$2.44
$35,194
California
$2.52
$21,178
Colorado
$2.64
$30,305
New York
$2.75
$33,033
Massachusetts
$2.90
$32,120
*Average system cost before incentives; system sizes differ by state, so compare the $/W column. Source: EnergySage Marketplace data, September 2026. See our average solar panel cost by state guide for all states.
The LBNL figure of $3.50/W (2024 median, cash purchases) is a useful reminder that marketplace averages are a best-case reference. If your quotes come in well above your state’s EnergySage average, get more bids before signing.
💰 System Cost
Federal Tax Credit Status in 2026: What Changed
Many older guides describe a 30% credit lasting through 2032. That is no longer correct. Under the One Big Beautiful Bill Act, signed July 4, 2025, the homeowner residential clean energy credit (Section 25D) ended for expenditures made after December 31, 2025, with no phase-down. Industry analysis and tax counsel indicate that the system effectively needed to be completed by that date.
What this means in practice:
Systems completed in 2026 or later: no 25D credit for homeowners who buy with cash or a loan.
Systems completed by December 31, 2025: eligible for the 30% credit. Unused credit can be carried forward into later tax years.
Leases and PPAs: third-party owners may still claim the commercial 48E credit under the new law, and some projects that began construction by July 4, 2026 have additional years to be placed in service. Rules are complex and include foreign-entity restrictions, so ask any provider whether, and how, savings are passed on to you.
For an 8 kW system at the EnergySage average of $2.62/W, that is a gross and net cost of about $20,960 before any state or local incentives, not the roughly $14,700 the same system would have cost after the old 30% credit.
State and local programs now matter more. EnergySage highlights Maryland, New York, Rhode Island, South Carolina and Washington, D.C. as having strong incentives. Examples include a Massachusetts state tax credit of 15% (up to $1,000), a New York state credit of 25% (up to $5,000) and Florida’s exemptions from sales tax and from property tax increases for solar. Program terms change, so confirm current details with your state energy office or the DSIRE database before relying on them.
Net metering is the other major variable. Where utilities credit exports at or near the retail rate, solar is worth more; where they credit at lower avoided-cost rates, as under California’s NEM 3.0, payback is longer. Check your utility’s current rules before you buy, and use our solar tax credit calculator and net metering calculator to model your situation.
📋 Key Insights
How to Read a Solar Quote and Spot Inflated Pricing
Most quotes show a single total with little detail. A few checks make them comparable:
Ask for price per watt explicitly. Any professional installer can calculate it in a minute. Divide total price by system size in watts to check their number.
Confirm system size in kilowatts, not just panel count. Twenty 400 W panels make an 8 kW system; twenty 350 W panels make 7 kW, which is 12.5% less capacity for the same panel count.
Verify the production estimate. The quote should state expected first-year kilowatt-hours. Compare it with an independent estimate for your address from NREL’s PVWatts calculator. A much higher figure from the installer can make payback look shorter than it will be.
Get the warranty terms in writing. Ask for the product, performance and workmanship warranties separately. EnergySage notes that the best panel brands offer 25-year warranties, so shorter terms on panels are worth questioning.
Compare financing against cash. Loan interest raises your total cost. As an illustration, a $20,000 loan at 7.99% APR over 20 years has a payment of about $167 a month and totals about $40,100, which is about $20,100 in interest. Run your own numbers with our solar loan calculator.
Collect at least three quotes. Competing bids are the most reliable way to find a fair price. Include at least one local installer, and compare itemized price per watt, equipment and warranties side by side.
When you have a quote you like, run it through the solar savings calculator and the solar payback calculator with your actual electricity rate. The U.S. average residential rate was about 18.8¢/kWh in April 2026 according to EIA data, but rates vary a lot by state and utility.
Sources
EnergySage, Solar panel cost in 2026 (national average, state and system-size data, cost breakdown; page updated June 30, 2026; state table updated September 25, 2026)
Lawrence Berkeley National Laboratory, Tracking the Sun (2024 median cash price of $3.50/W, as reported in the October 2025 edition and cited by EnergySage)
Direct answers for US homeowners — sized for a $150/month electric bill.
Solar panels average about $2.60 per watt installed, before incentives, on the EnergySage marketplace in 2026, which makes a typical 12 kW system about $31,135. Lawrence Berkeley National Laboratory's wider dataset is higher: the 2024 median price for cash purchases was $3.50 per watt. Marketplace quotes and national installed-price data measure different things, so expect your own quote to land between them.
Not for most homeowners. The One Big Beautiful Bill Act ended the 30% residential clean energy credit (Section 25D) for expenditures made after December 31, 2025, so systems completed in 2026 do not qualify. Homeowners whose systems were completed by that date, or who carry forward unused 25D credit, can still claim it. Leases and PPAs may use the 48E business credit. Confirm details with a tax professional.
A good price is at or below the average for your state and system size. EnergySage's 2026 data shows most states between roughly $2.25 and $3.10 per watt, with Florida, Texas and Arizona lowest and Hawaii and several Midwest and Southern states higher. Larger systems cost less per watt, from $2.89 at 4 kW to $2.47 at 15 kW. Compare at least three itemized quotes.
Yes. An installed price per watt should cover the full system: panels, inverters, racking, wiring, labor, permitting and interconnection, plus the installer's overhead and profit. EnergySage's breakdown of a $31,135 12 kW system puts panels at about 12% of the total, with sales, marketing, overhead and profit making up a much larger share. Ask for the all-in price in writing.
Multiply price per watt by system size in watts to get gross cost, subtract any upfront incentives, then divide by your yearly electricity savings. For example, an 8 kW system at $2.62 per watt costs $20,960; if it saves $2,000 a year, payback is about 10.5 years. EnergySage reports an average payback of about 10 years, and your electricity rate drives the result.
Same usage, bill-based guide
Your Solar Panel Cost Per Watt target maps to roughly a $150/month electric bill nationally.
18.19¢/kWh — US average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
Solar production
4.5 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
Installed price
$3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
Federal tax credit
$0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
Net metering
National blend — solar assumed to offset 75% of the bill (87% in full-retail net-metering states, 55–70% elsewhere).
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.