A typical home solar installation in the US costs roughly $23,000 to $35,000 before any incentives, based on 2025 installation data. The median price was about $3.60 per watt for homeowner-owned systems, and the median system was 7.7 kilowatts. Your own quote can land well above or below that, because roof, location, installer and batteries all move the number.
One big change for 2026: the 30% federal tax credit for homeowners is gone for systems finished after December 31, 2025. So the price you are quoted now is much closer to the price you actually pay.
Solar panel installation cost per watt in 2026
Installers price solar by the watt of panel capacity. That makes quotes for different system sizes easy to compare. The best public data comes from Lawrence Berkeley National Laboratory, which tracks millions of real installations. Its 2026 distributed solar and storage data update covers about 450,000 systems installed in 2025.
Here is what homeowners paid in 2025, before incentives, in 2025 dollars:
| Measure (2025 installs) | Median price per watt | Price for a 7.7 kW system |
|---|---|---|
| All homeowner-owned systems | about $3.60/W | about $27,700 |
| Paid in cash | about $3.00/W | about $23,100 |
| Financed with a loan | about $4.50/W | about $34,700 |
| Solar plus battery (cash) | about $2.10/W more than solar alone | roughly $16,000 more |
Loan-financed systems look pricier partly because lenders often fold fees into the upfront price. Those figures also leave out interest paid over the life of the loan. In practice, a loan can cost far more in total than the table shows.
Prices also vary a lot between companies. Among the 100 largest residential installers in 2025, median prices ran from about $2.40 to $6.30 per watt. About a quarter charged under $3 per watt, while roughly one in ten charged over $5. That spread is the main reason to get several quotes.
Typical system size and total price
The median US home system in 2025 was 7.7 kW, and most fell between about 5 and 12 kW. The right size for you depends on how much electricity you use, how much sun your roof gets, and how much roof space faces the right way. If you plan to add an electric car or heat pump later, your installer may suggest a larger system.
| System size | At $3.00/W | At $3.60/W | At $4.50/W |
|---|---|---|---|
| 5 kW | $15,000 | $18,000 | $22,500 |
| 7.7 kW | $23,100 | $27,700 | $34,650 |
| 10 kW | $30,000 | $36,000 | $45,000 |
| 12 kW | $36,000 | $43,200 | $54,000 |
These are simple multiplications of the 2025 medians, not quotes. Treat them as a sanity check when an offer arrives.
Price per panel
Many residential panels today are rated at roughly 400 to 450 watts. At $3.60 per watt, each panel in a finished system works out to about $1,400 to $1,600 installed. However, the panel itself is only a small slice of that. Berkeley Lab estimates that soft costs and other non-module equipment made up roughly 80% of the installed price in 2025. So a quote per panel mostly reflects labor, wiring, permits and sales costs, not the glass on your roof.
What drives the price of solar panels for home
Two homes on the same street can get very different quotes. These are the usual reasons:
- Roof. Steep, complex or tile roofs take longer to work on. If your roof is near the end of its life, it may need replacing first, which adds to the total.
- Equipment. Panel brand, inverter type and mounting hardware all matter. Microinverters and optimizers cost more than a single central inverter.
- Labor and soft costs. Customer acquisition, installation labor, financing fees, taxes and profit make up most of the bill. That is why prices fell only $0.10 to $0.20 per watt a year, on average, over the past decade.
- Permits and interconnection. Local permit fees and utility approval add cost and time. Berkeley Lab found permit timelines varied widely from project to project in 2025.
- Batteries. A battery is the biggest single add-on. The median home battery paired with solar in 2025 held 13.5 kWh.
- Financing. Cash buyers paid the lowest median prices. Loans and leases shift costs into monthly payments.
The federal solar tax credit ended for 2026 installs
For years, homeowners could claim the Residential Clean Energy Credit under Section 25D, worth 30% of system cost. The July 2025 budget law, known as the One Big Beautiful Bill Act, ended it for expenditures made after December 31, 2025.
Timing is set by installation, not payment. According to the IRS FAQ on the 2025 law changes, an expenditure counts as made when the original installation is completed. That means a system paid for in 2025 but finished in 2026 does not qualify. The IRS Residential Clean Energy Credit page confirms the credit is not available for property placed in service after 2025.
So for a system installed in 2026, there is no federal homeowner credit. If your system was completed in 2025, you claim the credit on your 2025 return using Form 5695. Some states, cities and utilities still run their own rebates, so check locally before you sign.
California: net billing and why batteries matter more
California homeowners face different math. Since April 15, 2023, new customers of PG&E, SCE and SDG&E take service under the Net Billing Tariff, often called NEM 3.0. The utilities market it as the Solar Billing Plan.
Under the old rules, power you sent to the grid earned credits close to the retail rate. Under net billing, exports are credited at values from the CPUC’s Avoided Cost Calculator instead. According to the California Public Utilities Commission, those values are usually lower than what you pay for grid power. The exception is some late summer evenings, when they can run higher.
That is why batteries matter more in California. Instead of exporting midday power cheaply, a battery stores it for use in the evening, when grid power costs the most. The CPUC says adding storage is the main way to get the most bill value under net billing. The data reflects this: storage attachment rose from 25% of US home installs in 2024 to 37% in 2025, with California driving much of the increase.
A few other details apply. The original customer locks in net billing terms for nine years. Also, PG&E and SCE residential customers who connect before the end of 2027 get a small extra export credit, but SDG&E customers do not.
How to estimate your payback period
The payback period is how long your bill savings take to cover the system’s net cost. The basic method is simple:
- Start with the total installed price, minus any state or local rebates.
- Estimate yearly production from your installer’s quote or a public tool. Production depends on sun, roof angle and shading.
- Value that production. Power you use yourself is worth your retail rate. Power you export is worth whatever your utility credits for it.
- Divide net cost by yearly savings.
For example, take a $23,100 cash system that offsets electricity worth $1,800 a year. That simple payback would be just under 13 years. For context, the EIA’s October 2026 outlook puts the 2026 US average residential price at about 18.2 cents per kWh. Still, rates differ widely by state, and they change over time.
Treat any estimate as a range, not a promise. Your real savings depend on usage, rate plans, export credits, maintenance and future price changes. In California, export credits are low, so payback depends heavily on how much solar power you use at home. This is general information, not financial advice.
Leasing vs buying
Buying, with cash or a loan, usually gives the lowest lifetime cost, and the system is yours. Leases and power purchase agreements let you pay little or nothing upfront. Instead, the solar company owns the system and you pay a monthly fee or a rate per kWh.
Lease companies claim business energy credits rather than the homeowner credit. Those credits run on a separate schedule. Under IRS guidance, solar projects generally need to start construction by July 4, 2026, or be placed in service by the end of 2027. So lease pricing may change as those deadlines pass. Also, read lease terms closely, including escalators and what happens if you sell the house.
Solar is also part of a wider shift toward renewable power, from projects such as the Rock Falls wind project to rooftop systems. And if you plan to charge an electric car at home, factor that load into your system size. Charging tech keeps evolving, as early wireless EV charging deals showed. For more explainers on energy and technology, see our science and technology guides.
Frequently asked questions
How much do solar panels cost for an average house?
For a median 7.7 kW system, expect roughly $23,000 to $35,000 before incentives, based on 2025 data. Cash purchases sit at the lower end. Loan-financed systems sit higher.
What is the cost per watt for solar panels?
The 2025 median was about $3.60 per watt for homeowner-owned systems. Cash buyers paid about $3.00 per watt, and loan buyers about $4.50.
Can I still get the 30% federal solar tax credit in 2026?
No, not for a homeowner-owned system. The Section 25D credit does not apply to installations completed after December 31, 2025, even if you paid earlier.
Do I need a battery with solar in California?
It is not required, but it often matters more under net billing. A battery lets you use cheap midday solar during expensive evening hours instead of exporting it for a low credit.
How much does one solar panel cost?
In a finished system, each 400 to 450 watt panel works out to roughly $1,400 to $1,600 installed. Most of that covers labor, wiring and other soft costs rather than the panel itself.
