Roof-mounted solar panel installation is about $18,000 for a 7 kW system and about $31,000 for a 12 kW system before local rebates or other incentives. EnergySage reports an average installed price of approximately $2.60 per watt in 2026.
Solar Panel Installation Cost at a Glance
| Solar system size | Approximate cost before incentives | Suitable for |
|---|---|---|
| 5 kW | About $13,000 | Smaller home or lower electricity use |
| 7 kW | About $18,340 | Small to medium home |
| 8 kW | About $20,800 | Medium home |
| 10 kW | About $26,000 | Larger home or higher electricity use |
| 12 kW | About $31,135 average | High electricity use or larger home |
The 5 kW through 10 kW figures use the 2026 average of approximately $2.60 per watt as a planning estimate. Actual prices depend on location, roof design, equipment and the installer. The 7 kW and 12 kW figures come from current installation data.
What Is Included in the Installation Price?
A professional solar quote normally includes the panels, electrical equipment, roof hardware, labor and project administration. Common line items include:
- Solar modules
- Inverter or microinverters
- Roof mounting and racking
- Electrical wiring, conduit and disconnects
- Labor and roof work
- Permits and inspections
- Utility interconnection
- System monitoring
- Installer overhead and warranties
The U.S. Department of Energy divides residential solar costs into hardware, fieldwork, office work and other project overhead. Hardware includes modules, inverters, storage, structural components and electrical components.
The panels are only one part of the project. EnergySage estimates that they account for about 12% of the total installation cost, so comparing panel prices alone will not show the full cost of going solar.
What Makes Roof-Mounted Solar More Expensive?
A larger system, difficult roof, aging roofing materials and higher local labor costs can all raise the price.
System size A home that uses more electricity needs more panels. Larger systems may have a lower price per watt, but the total project cost will usually be higher.
Roof complexity Multiple roof sections, steep pitches, dormers and difficult access increase labor and mounting costs.
Roof condition Replace an aging roof before installing solar if it will need work soon. Solar panels commonly remain in service for 25 to 30 years. Installing them on an older roof can lead to removal and reinstallation costs later.
Shade and roof orientation South-facing roofs with little shade are generally easier to design around. East- and west-facing roofs can also work, but shading and roof layout affect system size and energy production.
Local labor and permitting Labor rates, inspection requirements, permit fees and utility rules vary between states and cities.
Equipment selection Premium panels, microinverters and enhanced monitoring can increase the upfront price. They may be useful on shaded roofs or roofs with limited usable space, but they are not automatically the best financial choice.
How Much Does a Solar Battery Add?
A home solar battery typically adds about $15,000 before incentives, according to EnergySage. A battery may make sense if you want backup power, face frequent outages, use time-of-use electricity rates or receive limited compensation for sending excess electricity to the grid.
A battery is not required for a standard grid-connected solar system. If lowering the installation price is the priority, ask for a solar-only quote and a separate solar-plus-battery quote.
Is There Still a 30% Federal Solar Tax Credit?
No. For a U.S. residential solar system placed in service after December 31, 2025, the IRS states that the Residential Clean Energy Credit is no longer available. The former credit applied to qualifying systems installed from 2022 through December 31, 2025.
State, local and utility incentives may still be available in 2026, so check them separately.
For systems installed during an eligible year, qualifying expenses could include solar equipment, installation labor, onsite preparation and wiring that connects the system to the home.
What Is a Reasonable Solar Quote?
For a standard roof with no major repairs, approximately $2.60 per watt is a reasonable national 2026 planning benchmark. A quote may be higher when the roof is steep, shaded or complicated, or when the property is in a high-cost labor market.
Before signing, ask each installer to show:
- Total cash price
- System size in kW
- Estimated annual electricity production
- Panel and inverter brands
- Roof repair or removal costs
- Permit and interconnection fees
- Labor and workmanship warranty
- Expected completion date
- Battery price as a separate option
- Loan interest rate and total repayment cost, if financing
Paying cash generally produces a lower total cost than using a solar loan, lease or power purchase agreement. Financing can still reduce the upfront payment.
Bottom Line
Compare at least three itemized proposals after checking the roof condition, system output, financing terms and utility rules. Treat the battery as a separate purchase decision, and judge the quote by its total installed cost rather than the price of the panels alone.