How Much Does a 7 kW Solar System Cost in 2026?

A 7 kW solar system costs about $18,340 before incentives, according to EnergySage marketplace data updated July 21, 2026. That is about $2.62 per watt. It is also close to the typical U.S. home system: Berkeley Lab reports the median residential system installed in 2025 was 7.7 kW.

Key takeaways

• EnergySage's average 7 kW price was $18,340 before incentives in July 2026, with state averages from $14,273 in Texas to $20,785 in Massachusetts.
• 7 kW is a mainstream size, which should make it easier to get several competitive bids.
• A 7 kW system makes about 10,308 kWh a year at the U.S. average location, a little under what the average home buys.
• Price per watt, not total price, is the fair way to compare quotes.
• Buyers cannot claim the federal 25D credit for systems completed after December 31, 2025.

How much does a 7 kW solar system cost in 2026?

EnergySage's 7 kW page gives an average of $18,340. Its cost guide (June 30, 2026) lists 7 kW at $2.62 per watt, and its first-half 2026 market report put the median across all quotes at $2.57 per watt, about 3% above the second half of 2025.

Installed-price data from Berkeley Lab runs higher because it includes financed systems. Mercom's summary of Berkeley Lab's August 2026 update puts the inflation-adjusted 2025 median for host-owned home systems at $3.60 per watt, down from $4.10 in 2024. At that median, 7 kW would be about $25,200 (our math). The DOE's 2025Q1 benchmark, a cost model rather than a survey, put an 8 kW solar-only system at $2.95 per watt in 2024 dollars.

7 kW solar system cost by state

EnergySage's state averages for a 7 kW system in July 2026, before any incentives, with our per-watt division alongside.

State	Average 7 kW price	Per watt
Texas	$14,273	$2.04
Florida	$14,832	$2.12
Arizona	$15,977	$2.28
California	$17,160	$2.45
New Jersey	$17,872	$2.55
Washington	$18,200	$2.60
Colorado	$18,782	$2.68
New York	$19,350	$2.76
Maryland	$19,435	$2.78
Massachusetts	$20,785	$2.97

Our solar pages by state show local sunshine and electricity rates, which shape your payback.

Is 7 kW a typical home solar system size?

Yes. Berkeley Lab's 2026 data update gives a clear picture of what U.S. homes installed in 2025:

Residential solar in 2025	Berkeley Lab figure
Median system size	7.7 kW, up 0.5 kW from 2024
Typical size range (20th to 80th percentile)	About 5 to 12 kW
Share of new systems with a battery	37%, up from 25% in 2024
Median installer price range (100 largest installers)	About $2.4 to $6.3 per watt

Being typical has advantages. Installers build many systems this size, so you should be able to get several bids, and published averages like EnergySage's state figures are a fair guide to what you should pay. If an installer pushes a much larger design, ask to see the usage behind it.

How much power does a 7 kW system make?

EnergySage's PVWatts-based estimates for a 7 kW system:

• Phoenix: about 12,352 kWh a year
• Austin: about 10,344 kWh a year
• U.S. average location: about 10,308 kWh a year (859 kWh a month)
• Boston: about 9,168 kWh a year
• New York City: about 9,034 kWh a year

Location matters: the same 7 kW array makes about a third more in Phoenix than in Boston (our math from EnergySage's figures). That is why a quote's production estimate for your address matters more than the size on the cover page.

The EIA reports that the average home bought 10,791 kWh in 2022, so 7 kW at an average location covers about 95% of that (our division). The current national average is about 1,152 kWh a month at roughly 18.16¢ per kWh. If you have central air, an EV or above-average use, you may need a larger system. Estimate your size with our solar panel calculator.

What changes the price of a 7 kW system

• Installer. At Berkeley Lab's installer range, 7 kW could cost anywhere from about $16,800 to $44,100 (our math).
• Payment method. The CFPB found in 2024 that dealer fees often add 30% or more above the cash price and often do not appear in the stated APR.
• Battery. EnergySage reported battery pricing of $1,130 per kWh in the first half of 2026. Get prices with and without storage in writing so you can judge each part.
• Equipment. As a rough estimate, 7 kW of 400-watt panels is about 18 panels. Panel and inverter choices change the price.
• Permits and site work. EnergySage estimates permits and fees at about 8% of total cost, and says trimming or removing shade trees can run $300 to $1,500.

To compare, divide each cash price by the watts. $18,900 for 7 kW is $2.70 per watt. A $23,500 quote for 7.2 kW is about $3.26 per watt, or $4,600 more for a slightly larger system. If the higher quote lacks clearly better equipment or warranties, ask why. Read more in what price per watt is too high for solar.

Tax credits and incentives in 2026

Buying a 7 kW system now comes with no federal credit. The IRS explains that the 25D credit is not allowed for expenditures made after December 31, 2025, and that a solar expenditure counts as made when the original installation is completed. On $18,340, the old 30% credit would have been about $5,500 (our math). Some states, cities and utilities still offer rebates, SRECs or net metering, so check what applies locally.

Buying vs leasing a 7 kW system

EnergySage reported that the share of its shoppers choosing leases and PPAs rose from about 14% to roughly 41% during the first half of 2026, and that third-party-owned projects can still qualify for federal incentives through 2027. These deals can mean little or no money upfront, but you do not own the panels. The FTC warns that lease payments may rise over time, that ending a lease early can be costly, and that a future buyer may have to meet credit requirements to take over the contract. Compare the total you would pay over the contract with the cash price of buying. Our guide to solar lease vs buy covers the details.

Getting competitive bids for a 7 kW system

Because 7 kW is such a common size, you have leverage: several local installers should be willing to quote it. The U.S. Treasury's consumer solar guidance says to gather several quotes and compare three things side by side:

1. An itemized list of the work to be done and the materials to be installed
2. An itemized list of costs, including installation, any monthly fees and any increases in fees over time
3. The minimum power the system will produce, and what happens if it falls short

Before you choose, the FTC suggests searching the company's name with words like "complaints" or "reviews," checking its record with state and local consumer protection agencies, and walking away from anyone who pressures you for a quick decision or will not give you time to review the contract. A typical-size system should come with a typical, easy-to-compare quote. If one bid is vague about equipment or production while the others are specific, that tells you something.

Next steps

Collect a few written 7 kW quotes, convert them to cash price per watt and compare expected kWh. Then upload them to our solar quote checker to see whether your price is fair.